Cargo.toml

@@ -9,9 +9,26 @@ edition = "2021"
 # logging
 tracing = "0.1"
 
+# network
+async-trait = "0.1"
+http = "0.2"
+reqwest = "0.11"
+secrecy = "0.8"
+serde = { version = "1.0", features = ["derive"] }
+serde_json = "1.0"
+serde-xml-rs = "0.6"
+thiserror = "1.0"
+
 # fs
 tempfile = "3.10"
 
+[dev-dependencies]
+# testing
+assert2 = "0.3"
+pretty_assertions = "1.4"
+test-log = "0.2"
+tokio-test = "0.4"
+
 [package.metadata.bin]
 # Conventional commits githook
 cc-cli = { version = "0.1" }

src/filesystem.rs

@@ -0,0 +1,151 @@
+#![allow(unused)]
+
+use std::{
+    ops::Deref,
+    path::PathBuf,
+    sync::{Arc, Mutex},
+};
+
+use tempfile::{tempdir, TempDir};
+use tracing::info;
+
+#[derive(Clone, Debug)]
+pub enum FileSystem {
+    Real(RealFileSystemEnv),
+    Temp(TempFileSystemEnv),
+}
+impl FileSystem {
+    pub fn new_real(cwd: Option<PathBuf>) -> Self {
+        let cwd = cwd.unwrap_or_default();
+        Self::Real(RealFileSystemEnv::new(cwd))
+    }
+    pub fn new_temp() -> std::io::Result<Self> {
+        TempFileSystemEnv::new().map(Self::Temp)
+    }
+}
+impl Deref for FileSystem {
+    type Target = dyn FileSystemEnv;
+
+    fn deref(&self) -> &Self::Target {
+        match self {
+            Self::Real(env) => env,
+            Self::Temp(env) => env,
+        }
+    }
+}
+
+pub trait FileSystemEnv: Sync + Send + std::fmt::Debug {
+    fn cwd(&self) -> &PathBuf;
+
+    fn in_cwd(&self, name: &str) -> PathBuf {
+        self.cwd().join(name)
+    }
+
+    fn write_file(&self, file_name: &str, content: &str) -> std::io::Result<PathBuf> {
+        use std::fs::File;
+        use std::io::{LineWriter, Write};
+
+        let path = self.in_cwd(file_name);
+        info!("writing to {:?}", path);
+        let file = File::create(path.clone())?;
+        let mut file = LineWriter::new(file);
+        file.write_all(content.as_bytes())?;
+        Ok(path)
+    }
+
+    fn file_exists(&self, name: &PathBuf) -> bool {
+        use std::fs::File;
+        File::open(name).is_ok()
+    }
+
+    fn read_file(&self, file_name: &str) -> std::io::Result<String> {
+        use std::fs::File;
+        use std::io::Read;
+
+        let path = self.in_cwd(file_name);
+        info!("reading from {:?}", path);
+        let mut file = File::open(path)?;
+        let mut content = String::new();
+        file.read_to_string(&mut content)?;
+        Ok(content)
+    }
+}
+
+#[derive(Clone, Debug, Default)]
+pub struct RealFileSystemEnv {
+    cwd: PathBuf,
+}
+
+#[derive(Clone, Debug)]
+pub struct TempFileSystemEnv {
+    cwd: PathBuf,
+    temp_dir: Arc<Mutex<TempDir>>,
+}
+
+impl FileSystemEnv for TempFileSystemEnv {
+    fn cwd(&self) -> &PathBuf {
+        &self.cwd
+    }
+}
+
+impl FileSystemEnv for RealFileSystemEnv {
+    fn cwd(&self) -> &PathBuf {
+        &self.cwd
+    }
+}
+
+impl RealFileSystemEnv {
+    const fn new(cwd: PathBuf) -> Self {
+        Self { cwd }
+    }
+}
+
+impl TempFileSystemEnv {
+    fn new() -> std::io::Result<Self> {
+        let temp_dir = tempdir()?;
+        info!("temp dir: {:?}", temp_dir.path());
+        let cwd = temp_dir.path().to_path_buf();
+        let temp_dir = Arc::new(Mutex::new(temp_dir));
+        Ok(Self { cwd, temp_dir })
+    }
+}
+
+#[cfg(test)]
+mod tests {
+
+    use super::*;
+
+    use std::path::PathBuf;
+
+    #[test_log::test]
+    fn test_cwd() {
+        let cwd = PathBuf::from("/tmp");
+        let env = RealFileSystemEnv::new(cwd.clone());
+        assert_eq!(env.cwd(), &cwd);
+    }
+
+    #[test_log::test]
+    fn test_create_on_temp_fs() -> std::io::Result<()> {
+        let env = TempFileSystemEnv::new()?;
+        assert!(env.cwd().exists());
+        Ok(())
+    }
+
+    #[test_log::test]
+    fn test_create_on_real_fs() {
+        let cwd = PathBuf::from("/tmp");
+        let env = RealFileSystemEnv::new(cwd.clone());
+        assert_eq!(env.cwd(), &cwd);
+    }
+
+    #[test_log::test]
+    fn test_write_and_read_file() -> std::io::Result<()> {
+        let env = TempFileSystemEnv::new()?;
+        let file_name = "test.txt";
+        let content = "Hello, World!";
+        let path = env.write_file(file_name, content)?;
+        assert_eq!(env.read_file(file_name)?, content);
+        assert!(path.exists());
+        Ok(())
+    }
+}

src/lib.rs

@@ -1,3 +1,2 @@
-fn main() {
+pub mod filesystem;
-    println!("Hello, world!");
+pub mod network;
-}

src/network/mock.rs

@@ -0,0 +1,796 @@
+#![cfg(not(tarpaulin_include))]
+
+use serde::de::DeserializeOwned;
+use tracing::{event, Level};
+
+use std::collections::HashMap;
+use std::sync::{Arc, Mutex};
+
+use crate::network::StatusCode;
+
+use super::network_env::NetworkTrait;
+use super::{
+    NetRequest, NetResponse, NetUrl, Network, NetworkError, RequestBody, RequestMethod,
+    ResponseType, SavedRequest,
+};
+
+#[derive(Debug, Clone)]
+pub struct MockNetwork {
+    requests: Arc<Mutex<Vec<SavedRequest>>>,
+    get_responses: HashMap<NetUrl, (StatusCode, String)>,
+    get_errors: HashMap<NetUrl, String>,
+    post_responses: HashMap<NetUrl, (StatusCode, String)>,
+    post_errors: HashMap<NetUrl, String>,
+    put_responses: HashMap<NetUrl, (StatusCode, String)>,
+    put_errors: HashMap<NetUrl, String>,
+    patch_responses: HashMap<NetUrl, (StatusCode, String)>,
+    patch_errors: HashMap<NetUrl, String>,
+    delete_responses: HashMap<NetUrl, (StatusCode, String)>,
+    delete_errors: HashMap<NetUrl, String>,
+    propfind_responses: HashMap<NetUrl, (StatusCode, String)>,
+    propfind_errors: HashMap<NetUrl, String>,
+}
+impl MockNetwork {
+    pub fn new() -> Self {
+        Self {
+            requests: Arc::new(Mutex::new(Vec::new())),
+            get_responses: HashMap::new(),
+            get_errors: HashMap::new(),
+            post_responses: HashMap::new(),
+            post_errors: HashMap::new(),
+            put_responses: HashMap::new(),
+            put_errors: HashMap::new(),
+            patch_responses: HashMap::new(),
+            patch_errors: HashMap::new(),
+            delete_responses: HashMap::new(),
+            delete_errors: HashMap::new(),
+            propfind_responses: HashMap::new(),
+            propfind_errors: HashMap::new(),
+        }
+    }
+    pub fn requests(&self) -> Vec<SavedRequest> {
+        unsafe { self.requests.lock().unwrap_unchecked().clone() }
+    }
+    pub fn add_get_response(&mut self, url: &str, status: StatusCode, body: &str) {
+        let insert = self
+            .get_responses
+            .insert(NetUrl::new(url.to_string()), (status, body.to_string()));
+    }
+    pub fn add_get_error(&mut self, url: &str, error: &str) {
+        self.get_errors
+            .insert(NetUrl::new(url.to_string()), error.to_string());
+    }
+    pub fn add_post_response(&mut self, url: &str, status: StatusCode, body: &str) {
+        self.post_responses
+            .insert(NetUrl::new(url.to_string()), (status, body.to_string()));
+    }
+    pub fn add_post_error(&mut self, url: &str, error: &str) {
+        self.post_errors
+            .insert(NetUrl::new(url.to_string()), error.to_string());
+    }
+    pub fn add_put_response(&mut self, url: &str, status: StatusCode, body: &str) {
+        self.put_responses
+            .insert(NetUrl::new(url.to_string()), (status, body.to_string()));
+    }
+    pub fn add_put_error(&mut self, url: &str, error: &str) {
+        self.put_errors
+            .insert(NetUrl::new(url.to_string()), error.to_string());
+    }
+    pub fn add_patch_response(&mut self, url: &str, status: StatusCode, body: &str) {
+        self.patch_responses
+            .insert(NetUrl::new(url.to_string()), (status, body.to_string()));
+    }
+    pub fn add_patch_error(&mut self, url: &str, error: &str) {
+        self.patch_errors
+            .insert(NetUrl::new(url.to_string()), error.to_string());
+    }
+    pub fn add_delete_response(&mut self, url: &str, status: StatusCode, body: &str) {
+        self.delete_responses
+            .insert(NetUrl::new(url.to_string()), (status, body.to_string()));
+    }
+    pub fn add_delete_error(&mut self, url: &str, error: &str) {
+        self.delete_errors
+            .insert(NetUrl::new(url.to_string()), error.to_string());
+    }
+    pub fn add_propfind_response(&mut self, url: &str, status: StatusCode, body: &str) {
+        self.propfind_responses
+            .insert(NetUrl::new(url.to_string()), (status, body.to_string()));
+    }
+    pub fn add_propfind_error(&mut self, url: &str, error: &str) {
+        self.propfind_errors
+            .insert(NetUrl::new(url.to_string()), error.to_string());
+    }
+    fn save_request(&self, method: RequestMethod, url: &str, body: RequestBody) {
+        unsafe {
+            self.requests
+                .lock()
+                .unwrap_unchecked()
+                .push(SavedRequest::new(method, url, body));
+        }
+    }
+
+    #[tracing::instrument(skip_all)]
+    fn call<Reply: DeserializeOwned>(
+        &self,
+        net_request: NetRequest,
+    ) -> Result<NetResponse<Reply>, NetworkError> {
+        tracing::info!("MockNetworkEnv::call({:?})", net_request);
+        let method = net_request.method();
+        let url = net_request.url();
+        let body = net_request.body();
+        let response_type = net_request.response_type();
+        self.save_request(method, url, body.clone());
+        let errors = match method {
+            RequestMethod::Get => &self.get_errors,
+            RequestMethod::Post => &self.post_errors,
+            RequestMethod::Put => &self.put_errors,
+            RequestMethod::Patch => &self.patch_errors,
+            RequestMethod::Propfind => &self.propfind_errors,
+            RequestMethod::Delete => &self.delete_errors,
+        };
+        if let Some(error) = errors.get(url) {
+            event!(
+                Level::INFO,
+                "MockNetworkEnv::{}({}) -> error: {}",
+                method,
+                **url,
+                error
+            );
+            Err(NetworkError::RequestError(
+                method,
+                StatusCode::INTERNAL_SERVER_ERROR,
+                url.clone(),
+            ))
+        } else {
+            let responses = match method {
+                RequestMethod::Get => &self.get_responses,
+                RequestMethod::Post => &self.post_responses,
+                RequestMethod::Put => &self.put_responses,
+                RequestMethod::Patch => &self.patch_responses,
+                RequestMethod::Propfind => &self.propfind_responses,
+                RequestMethod::Delete => &self.delete_responses,
+            };
+            let (status, response) = responses.get(url).ok_or_else(|| {
+                tracing::error!(?method, ?url, "unexpected request");
+                NetworkError::MockError(method, StatusCode::NOT_IMPLEMENTED, url.clone())
+            })?;
+            if status.is_client_error() || status.is_server_error() {
+                event!(
+                    Level::INFO,
+                    "MockNetworkEnv::{}({}) -> error: {}",
+                    method,
+                    url,
+                    response
+                );
+                Err(NetworkError::RequestError(method, *status, url.clone()))
+            } else {
+                event!(
+                    Level::INFO,
+                    "MockNetworkEnv::{}({}) -> response: {}",
+                    method,
+                    url,
+                    response
+                );
+                let response_body: Option<Reply> = match response_type {
+                    ResponseType::Json => Some(serde_json::from_str(response)?),
+                    ResponseType::Xml => Some(serde_xml_rs::from_str(response)?),
+                    ResponseType::None => None,
+                    ResponseType::Text => {
+                        // use call_string() instead
+                        Err(NetworkError::UnexpectedMockRequest {
+                            method,
+                            request_url: url.clone(),
+                        })?
+                    }
+                };
+                Ok(NetResponse::new(method, url, *status, response_body))
+            }
+        }
+    }
+
+    fn call_string(&self, net_request: NetRequest) -> Result<NetResponse<String>, NetworkError> {
+        let method = net_request.method();
+        let url = net_request.url();
+        let body = net_request.body();
+
+        match body {
+            RequestBody::String(_) => Ok(()),
+            RequestBody::None => Ok(()),
+            _ => Err(NetworkError::InvalidRequestBody),
+        }?;
+
+        self.save_request(method, url, body.clone());
+        event!(Level::INFO, "MockNetworkEnv::{}({})", method, url);
+        self.check_for_error(method, url).map_or_else(
+            || self.as_response(method, url, &net_request),
+            |error| as_server_error(method, url, error),
+        )
+    }
+
+    fn as_response(
+        &self,
+        method: RequestMethod,
+        url: &NetUrl,
+        net_request: &NetRequest,
+    ) -> Result<NetResponse<String>, NetworkError> {
+        event!(Level::INFO, "url: {}", url);
+        let (status, response) = self.check_for_response(method, url).ok_or_else(|| {
+            NetworkError::MockError(method, StatusCode::NOT_IMPLEMENTED, url.clone())
+        })?;
+        event!(Level::INFO, "status: {:?}", status);
+        let response_body = match net_request.response_type() {
+            ResponseType::None => None,
+            _ => {
+                let response_body: String = response.to_string();
+                event!(Level::INFO, "response_body: {:?}", response_body);
+                Some(response_body)
+            }
+        };
+        Ok(NetResponse::new(method, url, *status, response_body))
+    }
+
+    fn check_for_response(
+        &self,
+        method: RequestMethod,
+        url: &NetUrl,
+    ) -> Option<&(StatusCode, String)> {
+        (match method {
+            RequestMethod::Get => &self.get_responses,
+            RequestMethod::Post => &self.post_responses,
+            RequestMethod::Put => &self.put_responses,
+            RequestMethod::Patch => &self.patch_responses,
+            RequestMethod::Propfind => &self.propfind_responses,
+            RequestMethod::Delete => &self.delete_responses,
+        })
+        .get(url)
+    }
+
+    fn check_for_error(&self, method: RequestMethod, url: &NetUrl) -> Option<&String> {
+        (match method {
+            RequestMethod::Get => &self.get_errors,
+            RequestMethod::Post => &self.post_errors,
+            RequestMethod::Put => &self.put_errors,
+            RequestMethod::Patch => &self.patch_errors,
+            RequestMethod::Propfind => &self.propfind_errors,
+            RequestMethod::Delete => &self.delete_errors,
+        })
+        .get(url)
+    }
+}
+
+fn as_server_error(
+    method: RequestMethod,
+    url: &NetUrl,
+    error: &String,
+) -> Result<NetResponse<String>, NetworkError> {
+    event!(
+        Level::INFO,
+        "MockNetworkEnv::{}({}) -> error: {}",
+        method,
+        url,
+        error
+    );
+    Err(NetworkError::RequestError(
+        method,
+        StatusCode::INTERNAL_SERVER_ERROR,
+        url.clone(),
+    ))
+}
+impl Default for MockNetwork {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+impl From<MockNetwork> for Network {
+    fn from(mock: MockNetwork) -> Self {
+        Self::Mock(mock)
+    }
+}
+
+#[async_trait::async_trait]
+impl NetworkTrait for MockNetwork {
+    async fn get<Reply: DeserializeOwned>(
+        &self,
+        net_request: NetRequest,
+    ) -> Result<NetResponse<Reply>, NetworkError> {
+        assert_eq!(
+            net_request.method(),
+            RequestMethod::Get,
+            "get method must be RequestMethod::Get"
+        );
+        self.call(net_request)
+    }
+
+    async fn get_string(
+        &self,
+        net_request: NetRequest,
+    ) -> Result<NetResponse<String>, NetworkError> {
+        assert_eq!(
+            net_request.method(),
+            RequestMethod::Get,
+            "get_string method must be RequestMethod::Get"
+        );
+        assert_eq!(
+            net_request.response_type(),
+            ResponseType::Text,
+            "get_string response_type must be ResponseType::Text"
+        );
+        self.call_string(net_request)
+    }
+
+    async fn post_json<Reply: DeserializeOwned>(
+        &self,
+        net_request: NetRequest,
+    ) -> Result<NetResponse<Reply>, NetworkError> {
+        assert_eq!(
+            net_request.method(),
+            RequestMethod::Post,
+            "post method must be RequestMethod::Post"
+        );
+        assert!(
+            matches!(net_request.body(), RequestBody::Json(_)),
+            "request body must be RequestBody::Json"
+        );
+        self.call(net_request)
+    }
+
+    async fn post_string(
+        &self,
+        net_request: NetRequest,
+    ) -> Result<NetResponse<String>, NetworkError> {
+        assert_eq!(
+            net_request.method(),
+            RequestMethod::Post,
+            "post_string method must be RequestMethod::Post"
+        );
+        assert_eq!(
+            net_request.response_type(),
+            ResponseType::Text,
+            "post_string response_type must be ResponseType::Text"
+        );
+        self.call_string(net_request)
+    }
+
+    async fn put_json<Reply: DeserializeOwned>(
+        &self,
+        net_request: NetRequest,
+    ) -> Result<NetResponse<Reply>, NetworkError> {
+        assert_eq!(
+            net_request.method(),
+            RequestMethod::Put,
+            "put method must be RequestMethod::Put"
+        );
+        assert!(
+            matches!(net_request.body(), RequestBody::Json(_)),
+            "request body must be RequestBody::Json"
+        );
+        self.call(net_request)
+    }
+
+    async fn put_string(
+        &self,
+        net_request: NetRequest,
+    ) -> Result<NetResponse<String>, NetworkError> {
+        assert_eq!(
+            net_request.method(),
+            RequestMethod::Put,
+            "put_string method must be RequestMethod::Put"
+        );
+        assert_eq!(
+            net_request.response_type(),
+            ResponseType::Text,
+            "put_string response_type must be ResponseType::Text"
+        );
+        self.call_string(net_request)
+    }
+
+    async fn patch_json<Reply: DeserializeOwned + std::fmt::Debug>(
+        &self,
+        net_request: NetRequest,
+    ) -> Result<NetResponse<Reply>, NetworkError> {
+        assert_eq!(
+            net_request.method(),
+            RequestMethod::Patch,
+            "patch method must be RequestMethod::Patch"
+        );
+        assert!(
+            matches!(net_request.body(), RequestBody::Json(_)),
+            "request body must be RequestBody::Json"
+        );
+        self.call(net_request)
+    }
+
+    #[tracing::instrument(skip(self))]
+    async fn delete(&self, net_request: NetRequest) -> Result<NetResponse<()>, NetworkError> {
+        assert_eq!(
+            net_request.method(),
+            RequestMethod::Delete,
+            "delete method must be RequestMethod::Delete"
+        );
+        assert_eq!(
+            net_request.response_type(),
+            ResponseType::None,
+            "delete response_type must be ResponseType::None"
+        );
+        self.call(net_request)
+    }
+
+    async fn propfind<Reply: DeserializeOwned + std::fmt::Debug>(
+        &self,
+        net_request: NetRequest,
+    ) -> Result<NetResponse<Reply>, NetworkError> {
+        assert_eq!(
+            net_request.method(),
+            RequestMethod::Propfind,
+            "propfind method must be RequestMethod::Propfind"
+        );
+        assert_eq!(
+            net_request.response_type(),
+            ResponseType::Xml,
+            "propfind response_type must be ResponseType::Xml"
+        );
+        assert_eq!(
+            net_request.body(),
+            &RequestBody::None,
+            "delete body must be RequestBody::None"
+        );
+        self.call(net_request)
+    }
+
+    async fn propfind_string(
+        &self,
+        net_request: NetRequest,
+    ) -> Result<NetResponse<String>, NetworkError> {
+        assert_eq!(
+            net_request.method(),
+            RequestMethod::Propfind,
+            "propfind_string method must be RequestMethod::Propfind"
+        );
+        assert_eq!(
+            net_request.response_type(),
+            ResponseType::Text,
+            "propfind_string response_type must be ResponseType::Text"
+        );
+        assert_eq!(
+            net_request.body(),
+            &RequestBody::None,
+            "delete body must be RequestBody::None"
+        );
+        self.call_string(net_request)
+    }
+}
+
+#[cfg(test)]
+mod tests {
+
+    use crate::network::{NetResponse, NetworkError, RequestMethod};
+
+    use super::*;
+
+    use reqwest::StatusCode;
+
+    use pretty_assertions::assert_eq;
+    use serde_json::json;
+    use tokio_test::block_on;
+
+    #[test_log::test]
+    fn test_mock_network_env_get() -> Result<(), NetworkError> {
+        let mut net = MockNetwork::new();
+        net.add_get_response("https://httpbin.org", StatusCode::OK, r#"{"foo": "bar"}"#);
+        let net_request = NetRequest::get(NetUrl::new("https://httpbin.org".into())).build();
+        let response: NetResponse<HashMap<String, String>> = block_on(net.get(net_request))?;
+        assert_eq!(
+            response
+                .response_body()
+                .and_then(|body| body.get("foo").cloned()),
+            Some("bar".to_string())
+        );
+        assert_eq!(
+            net.requests(),
+            vec![SavedRequest::new(
+                RequestMethod::Get,
+                "https://httpbin.org",
+                RequestBody::None
+            )]
+        );
+        Ok(())
+    }
+
+    #[test_log::test]
+    fn test_mock_network_env_get_error() -> Result<(), NetworkError> {
+        let mut net = MockNetwork::new();
+        net.add_get_error("https://httpbin.org", "error");
+        let net_request = NetRequest::get(NetUrl::new("https://httpbin.org".into())).build();
+        let result: Result<NetResponse<HashMap<String, String>>, NetworkError> =
+            block_on(net.get(net_request));
+        assert!(result.is_err());
+        assert_eq!(
+            net.requests(),
+            vec![SavedRequest::new(
+                RequestMethod::Get,
+                "https://httpbin.org",
+                RequestBody::None
+            )]
+        );
+        Ok(())
+    }
+
+    #[test_log::test]
+    fn test_mock_network_env_get_string() -> Result<(), NetworkError> {
+        let mut net = MockNetwork::new();
+        net.add_get_response("https://httpbin.org", StatusCode::OK, r#"{"foo":"bar"}"#);
+        let net_request = NetRequest::get(NetUrl::new("https://httpbin.org".into()))
+            .response_type(ResponseType::Text)
+            .build();
+        let response: NetResponse<String> = block_on(net.get_string(net_request))?;
+        assert_eq!(
+            response.response_body(),
+            Some(json!({"foo":"bar"}).to_string())
+        );
+        assert_eq!(
+            net.requests(),
+            vec![SavedRequest::new(
+                RequestMethod::Get,
+                "https://httpbin.org",
+                RequestBody::None
+            )]
+        );
+        Ok(())
+    }
+
+    #[test_log::test]
+    fn test_mock_network_env_get_string_error() {
+        let mut net = MockNetwork::new();
+        net.add_get_error("https://httpbin.org", "error");
+        let net_request = NetRequest::get(NetUrl::new("https://httpbin.org".into()))
+            .response_type(ResponseType::Text)
+            .build();
+        let result: Result<NetResponse<String>, NetworkError> =
+            block_on(net.get_string(net_request));
+        assert!(result.is_err());
+        assert_eq!(
+            net.requests(),
+            vec![SavedRequest::new(
+                RequestMethod::Get,
+                "https://httpbin.org",
+                RequestBody::None
+            )]
+        );
+    }
+
+    #[test_log::test]
+    fn test_mock_network_env_post() -> Result<(), NetworkError> {
+        let mut net = MockNetwork::new();
+        net.add_post_response("https://httpbin.org", StatusCode::OK, r#"{"foo": "bar"}"#);
+        let net_request = NetRequest::post(NetUrl::new("https://httpbin.org".into()))
+            .json_body(json!({}))?
+            .build();
+        let response: NetResponse<HashMap<String, String>> = block_on(net.post_json(net_request))?;
+        assert_eq!(
+            response
+                .response_body()
+                .and_then(|body| body.get("foo").cloned()),
+            Some("bar".to_string())
+        );
+        assert_eq!(
+            net.requests(),
+            vec![SavedRequest::new(
+                RequestMethod::Post,
+                "https://httpbin.org",
+                RequestBody::Json(json!({}))
+            )]
+        );
+        Ok(())
+    }
+
+    #[test_log::test]
+    fn test_mock_network_env_post_error() -> Result<(), NetworkError> {
+        let mut net = MockNetwork::new();
+        net.add_post_error("https://httpbin.org", "error");
+        let net_request = NetRequest::post(NetUrl::new("https://httpbin.org".into()))
+            .json_body(json!({}))?
+            .build();
+        let result: Result<NetResponse<HashMap<String, String>>, NetworkError> =
+            block_on(net.post_json(net_request));
+        assert!(result.is_err());
+        assert_eq!(
+            net.requests(),
+            vec![SavedRequest::new(
+                RequestMethod::Post,
+                "https://httpbin.org",
+                RequestBody::Json(json!({}))
+            )]
+        );
+        Ok(())
+    }
+
+    #[test_log::test]
+    fn test_mock_network_env_put_json() -> Result<(), NetworkError> {
+        let mut net = MockNetwork::new();
+        net.add_put_response("https://httpbin.org", StatusCode::OK, r#"{"foo": "bar"}"#);
+        let net_request = NetRequest::put(NetUrl::new("https://httpbin.org".into()))
+            .json_body(json!({}))?
+            .build();
+        let response: NetResponse<HashMap<String, String>> = block_on(net.put_json(net_request))?;
+        assert_eq!(
+            response
+                .response_body()
+                .and_then(|body| body.get("foo").cloned()),
+            Some("bar".to_string())
+        );
+        assert_eq!(
+            net.requests(),
+            vec![SavedRequest::new(
+                RequestMethod::Put,
+                "https://httpbin.org",
+                RequestBody::Json(json!({}))
+            )]
+        );
+        Ok(())
+    }
+
+    #[test_log::test]
+    fn test_mock_network_env_put_json_error() -> Result<(), NetworkError> {
+        let mut net = MockNetwork::new();
+        net.add_put_error("https://httpbin.org", "error");
+        let net_request = NetRequest::put(NetUrl::new("https://httpbin.org".into()))
+            .json_body(json!({}))?
+            .build();
+        let result: Result<NetResponse<HashMap<String, String>>, NetworkError> =
+            block_on(net.put_json(net_request));
+        assert!(result.is_err());
+        assert_eq!(
+            net.requests(),
+            vec![SavedRequest::new(
+                RequestMethod::Put,
+                "https://httpbin.org",
+                RequestBody::Json(json!({}))
+            )]
+        );
+        Ok(())
+    }
+
+    #[test_log::test]
+    fn test_mock_network_env_put_string() -> Result<(), NetworkError> {
+        let mut net = MockNetwork::new();
+        net.add_put_response("https://httpbin.org", StatusCode::OK, r#"{"foo":"bar"}"#);
+        let net_request = NetRequest::put(NetUrl::new("https://httpbin.org".into()))
+            .string_body("PLAIN-TEXT".to_string())
+            .build();
+        let response: NetResponse<String> = block_on(net.put_string(net_request))?;
+        assert_eq!(
+            response.response_body(),
+            Some(json!({"foo":"bar"}).to_string())
+        );
+        assert_eq!(
+            net.requests(),
+            vec![SavedRequest::new(
+                RequestMethod::Put,
+                "https://httpbin.org",
+                RequestBody::String("PLAIN-TEXT".to_string()),
+            )]
+        );
+        Ok(())
+    }
+
+    #[test_log::test]
+    fn test_mock_network_env_put_string_error() {
+        let mut net = MockNetwork::new();
+        net.add_put_error("https://httpbin.org", "error");
+        let net_request = NetRequest::put(NetUrl::new("https://httpbin.org".into()))
+            .string_body("PLAIN-TEXT".to_string())
+            .build();
+        let result: Result<NetResponse<String>, NetworkError> =
+            block_on(net.put_string(net_request));
+        assert!(result.is_err());
+        assert_eq!(
+            net.requests(),
+            vec![SavedRequest::new(
+                RequestMethod::Put,
+                "https://httpbin.org",
+                RequestBody::String("PLAIN-TEXT".to_string())
+            )]
+        );
+    }
+
+    #[derive(Debug, PartialEq, Eq, serde::Deserialize)]
+    struct PropfindTestResponse {
+        pub foo: String,
+    }
+
+    #[test_log::test]
+    fn test_mock_network_env_propfind() -> Result<(), NetworkError> {
+        let mut net = MockNetwork::new();
+        net.add_propfind_response(
+            "https://caldav.org",
+            StatusCode::OK,
+            r#"<container><foo>bar</foo></container>"#,
+        );
+        let net_request = NetRequest::propfind(NetUrl::new("https://caldav.org".into()))
+            .response_type(ResponseType::Xml)
+            .build();
+        let response: NetResponse<PropfindTestResponse> = block_on(net.propfind(net_request))?;
+        assert_eq!(
+            response.response_body().map(|body| body.foo),
+            Some("bar".to_string())
+        );
+        assert_eq!(
+            net.requests(),
+            vec![SavedRequest::new(
+                RequestMethod::Propfind,
+                "https://caldav.org",
+                RequestBody::None
+            )]
+        );
+        Ok(())
+    }
+
+    #[test_log::test]
+    fn test_mock_network_env_propfind_string() -> Result<(), NetworkError> {
+        let mut net = MockNetwork::new();
+        net.add_propfind_response(
+            "https://caldav.org",
+            StatusCode::OK,
+            r#"<container><foo>bar</foo></container>"#,
+        );
+        let net_request = NetRequest::propfind(NetUrl::new("https://caldav.org".into()))
+            .response_type(ResponseType::Text)
+            .build();
+        let response: NetResponse<String> = block_on(net.propfind_string(net_request))?;
+        assert_eq!(
+            response.response_body(),
+            Some("<container><foo>bar</foo></container>".to_string())
+        );
+        assert_eq!(
+            net.requests(),
+            vec![SavedRequest::new(
+                RequestMethod::Propfind,
+                "https://caldav.org",
+                RequestBody::None
+            )]
+        );
+        Ok(())
+    }
+
+    #[test_log::test]
+    fn test_mock_network_env_propfind_error() -> Result<(), NetworkError> {
+        let mut net = MockNetwork::new();
+        net.add_propfind_error("https://caldav.org", "error");
+        let net_request = NetRequest::propfind(NetUrl::new("https://caldav.org".into()))
+            .response_type(ResponseType::Xml)
+            .build();
+        let result: Result<NetResponse<PropfindTestResponse>, NetworkError> =
+            block_on(net.propfind(net_request));
+        assert!(result.is_err());
+        assert_eq!(
+            net.requests(),
+            vec![SavedRequest::new(
+                RequestMethod::Propfind,
+                "https://caldav.org",
+                RequestBody::None
+            )]
+        );
+        Ok(())
+    }
+
+    #[test_log::test]
+    fn test_mock_network_env_propfind_string_error() -> Result<(), NetworkError> {
+        let mut net = MockNetwork::new();
+        net.add_propfind_error("https://caldav.org", "error");
+        let net_request = NetRequest::propfind(NetUrl::new("https://caldav.org".into()))
+            .response_type(ResponseType::Text)
+            .build();
+        let result: Result<NetResponse<String>, NetworkError> =
+            block_on(net.propfind_string(net_request));
+        assert!(result.is_err());
+        assert_eq!(
+            net.requests(),
+            vec![SavedRequest::new(
+                RequestMethod::Propfind,
+                "https://caldav.org",
+                RequestBody::None
+            )]
+        );
+        Ok(())
+    }
+}

src/network/mod.rs

@@ -0,0 +1,36 @@
+mod mock;
+mod net_auth;
+mod net_request;
+mod net_request_headers;
+mod net_response;
+mod network_env;
+mod network_error;
+mod real;
+mod request_body;
+mod request_method;
+mod response_type;
+mod saved_request;
+
+pub use mock::MockNetwork;
+pub use net_auth::NetAuth;
+pub use net_auth::NetAuthPassword;
+pub use net_auth::NetAuthUsername;
+pub use net_request::NetRequest;
+pub use net_request::NetRequestLogging;
+pub use net_request::NetUrl;
+pub use net_request_headers::NetRequestHeaders;
+pub use net_response::NetResponse;
+pub use network_env::Network;
+pub use network_error::NetworkError;
+pub use real::RealNetwork;
+pub use request_body::RequestBody;
+pub use request_method::RequestMethod;
+pub use response_type::ResponseType;
+pub use saved_request::SavedRequest;
+
+pub use reqwest::header::HeaderMap;
+pub use reqwest::Error as ReqwestError;
+pub use reqwest::StatusCode;
+pub use serde_json::json;
+
+pub type NetworkResult<T> = Result<T, NetworkError>;

src/network/net_auth.rs

@@ -0,0 +1,66 @@
+use std::fmt::{Display, Formatter};
+
+#[derive(Debug, Clone)]
+pub struct Password(secrecy::SecretString);
+impl Password {
+    pub fn new(password: String) -> Self {
+        Self(secrecy::SecretString::new(password))
+    }
+    pub fn expose_password(&self) -> &str {
+        secrecy::ExposeSecret::expose_secret(&self.0)
+    }
+}
+
+#[derive(Debug, Clone)]
+pub struct NetAuthUsername(String);
+impl NetAuthUsername {
+    pub fn new(username: String) -> Self {
+        Self(username)
+    }
+    pub fn as_str(&self) -> &str {
+        &self.0
+    }
+}
+impl Display for NetAuthUsername {
+    fn fmt(&self, f: &mut Formatter) -> std::fmt::Result {
+        write!(f, "{}", self.0)
+    }
+}
+
+/// "Password for HTTP authentication");
+#[derive(Debug, Clone)]
+pub struct NetAuthPassword(Password);
+impl NetAuthPassword {
+    pub fn new(password: String) -> Self {
+        Self(Password::new(password))
+    }
+    pub fn expose_password(&self) -> &str {
+        self.0.expose_password()
+    }
+    // pub const fn as_str(&self) -> &str {
+    //     "********"
+    // }
+}
+impl From<Password> for NetAuthPassword {
+    fn from(password: Password) -> Self {
+        Self(password)
+    }
+}
+// new_type_display!(NetAuthPassword);
+
+#[derive(Debug, Clone)]
+pub struct NetAuth {
+    username: NetAuthUsername,
+    password: NetAuthPassword,
+}
+impl NetAuth {
+    pub const fn new(username: NetAuthUsername, password: NetAuthPassword) -> Self {
+        Self { username, password }
+    }
+    pub const fn username(&self) -> &NetAuthUsername {
+        &self.username
+    }
+    pub const fn password(&self) -> &NetAuthPassword {
+        &self.password
+    }
+}

src/network/net_request.rs

@@ -0,0 +1,462 @@
+use std::fmt::Display;
+use std::fmt::Formatter;
+use std::ops::Deref;
+
+use crate::network::HeaderMap;
+use crate::network::NetAuth;
+use crate::network::RequestBody;
+use crate::network::RequestMethod;
+use crate::network::ResponseType;
+
+use super::NetRequestHeaders;
+
+#[derive(Debug, Default, Clone, PartialEq, Eq, Hash)]
+pub struct NetUrl(String);
+impl NetUrl {
+    pub const fn new(url: String) -> Self {
+        Self(url)
+    }
+    pub fn as_str(&self) -> &str {
+        &self.0
+    }
+}
+impl Deref for NetUrl {
+    type Target = String;
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+impl Display for NetUrl {
+    fn fmt(&self, f: &mut Formatter) -> std::fmt::Result {
+        write!(f, "{}", self.0)
+    }
+}
+
+#[derive(Debug, Copy, Clone, PartialEq, Eq)]
+pub enum NetRequestLogging {
+    None,
+    Request,
+    Response,
+    Both,
+}
+impl Default for NetRequestLogging {
+    fn default() -> Self {
+        Self::None
+    }
+}
+
+#[derive(Debug)]
+pub struct NetRequest {
+    method: RequestMethod,
+    url: NetUrl,
+    body: RequestBody,
+    response_type: ResponseType,
+    auth: Option<NetAuth>,
+    headers: NetRequestHeaders,
+    log: NetRequestLogging,
+}
+impl NetRequest {
+    pub fn get(net_url: NetUrl) -> NetRequestBuilder {
+        NetRequestBuilder::default()
+            .url(net_url)
+            .header("Accept", "application/json")
+    }
+    pub fn post(net_url: NetUrl) -> NetRequestBuilder {
+        NetRequestBuilder::default()
+            .method(RequestMethod::Post)
+            .url(net_url)
+    }
+    pub fn put(net_url: NetUrl) -> NetRequestBuilder {
+        NetRequestBuilder::default()
+            .method(RequestMethod::Put)
+            .url(net_url)
+    }
+
+    pub fn patch(net_url: NetUrl) -> NetRequestBuilder {
+        NetRequestBuilder::default()
+            .method(RequestMethod::Patch)
+            .url(net_url)
+    }
+
+    pub fn delete(net_url: NetUrl) -> NetRequestBuilder {
+        NetRequestBuilder::default()
+            .method(RequestMethod::Delete)
+            .response_type(ResponseType::None)
+            .url(net_url)
+    }
+
+    pub fn propfind(net_url: NetUrl) -> NetRequestBuilder {
+        NetRequestBuilder::default()
+            .method(RequestMethod::Propfind)
+            .response_type(ResponseType::None)
+            .url(net_url)
+    }
+
+    const fn new(
+        method: RequestMethod,
+        url: NetUrl,
+        headers: NetRequestHeaders,
+        body: RequestBody,
+        response_type: ResponseType,
+        auth: Option<NetAuth>,
+        log: NetRequestLogging,
+    ) -> Self {
+        Self {
+            method,
+            url,
+            headers,
+            body,
+            response_type,
+            auth,
+            log,
+        }
+    }
+    pub fn as_trace(&self) -> String {
+        format!(
+            "{} {}",
+            self.method,
+            self.url.as_str().chars().take(90).collect::<String>()
+        )
+    }
+    pub const fn method(&self) -> RequestMethod {
+        self.method
+    }
+    pub const fn url(&self) -> &NetUrl {
+        &self.url
+    }
+    pub const fn body(&self) -> &RequestBody {
+        &self.body
+    }
+    pub const fn response_type(&self) -> ResponseType {
+        self.response_type
+    }
+    pub const fn log(&self) -> NetRequestLogging {
+        self.log
+    }
+    pub fn auth(&self) -> Option<NetAuth> {
+        self.auth.clone()
+    }
+    pub fn headers(&self) -> HeaderMap {
+        self.headers
+            .clone()
+            .try_into()
+            .unwrap_or_else(|_| HeaderMap::new())
+    }
+    pub fn as_curl(&self) -> Result<String, serde_json::Error> {
+        let mut curl = format!("curl -X {} {}", self.method, *self.url);
+        if let Some(accept) = &self.response_type.accept() {
+            if self.headers.get("Accept").is_none() {
+                curl.push_str(&format!(" -H 'Accept: {}'", accept));
+            }
+        }
+        let mut headers = vec![];
+        for (key, value) in self.headers.iter() {
+            headers.push(format!(" -H '{}: {}'", key, value));
+        }
+        headers.sort();
+        for header in headers {
+            curl.push_str(&header);
+        }
+        if let Some(auth) = &self.auth() {
+            curl.push_str(&format!(
+                " -u {}:{}",
+                auth.username(),
+                auth.password().expose_password()
+            ));
+        }
+        if self.method == RequestMethod::Post || self.method == RequestMethod::Put {
+            let body = String::try_from(&self.body)?;
+            curl.push_str(&format!(" -d '{}'", body));
+        }
+        Ok(curl)
+    }
+}
+
+#[derive(Default)]
+pub struct NetRequestBuilder {
+    method: RequestMethod,
+    url: NetUrl,
+    headers: NetRequestHeaders,
+    body: RequestBody,
+    response_type: ResponseType,
+    auth: Option<NetAuth>,
+    log: NetRequestLogging,
+}
+impl NetRequestBuilder {
+    pub fn build(self) -> NetRequest {
+        NetRequest::new(
+            self.method,
+            self.url,
+            self.headers,
+            self.body,
+            self.response_type,
+            self.auth,
+            self.log,
+        )
+    }
+
+    pub fn method(mut self, method: RequestMethod) -> Self {
+        assert_ne!(method, RequestMethod::default());
+        self.method = method;
+        if self.method == RequestMethod::Get || self.method == RequestMethod::Delete {
+            self.body = RequestBody::None;
+        }
+        self
+    }
+
+    fn url(mut self, url: NetUrl) -> Self {
+        self.url = url;
+        self
+    }
+
+    pub fn header(mut self, key: &str, value: &str) -> Self {
+        self.headers = self.headers.with(key, value);
+        self
+    }
+
+    pub fn headers(mut self, new_headers: NetRequestHeaders) -> Self {
+        assert_ne!(new_headers, NetRequestHeaders::default());
+        for (key, value) in new_headers.iter() {
+            self.headers = self.headers.with(key, value);
+        }
+        self
+    }
+
+    pub fn body(mut self, body: RequestBody) -> Self {
+        match body {
+            RequestBody::Json(_) => {
+                self.headers = self.headers.with("Content-Type", "application/json")
+            }
+            RequestBody::Xml(_) => {
+                self.headers = self.headers.with("Content-Type", "application/xml")
+            }
+            _ => (),
+        }
+        self.body = body;
+        self
+    }
+
+    pub fn string_body(mut self, body: String) -> Self {
+        self.body = RequestBody::String(body);
+        self.header("Content-Type", "text/plain")
+            .response_type(ResponseType::Text)
+    }
+
+    pub fn json_body<T: serde::Serialize>(mut self, body: T) -> Result<Self, serde_json::Error> {
+        self.body = RequestBody::json(body)?;
+        Ok(self.header("Content-Type", "application/json"))
+    }
+
+    pub fn xml_body(mut self, body: &str) -> Self {
+        self.body = RequestBody::Xml(body.to_string());
+        self.header("Content-Type", "application/xml")
+    }
+
+    pub fn response_type(mut self, response_type: ResponseType) -> Self {
+        assert_ne!(response_type, ResponseType::default());
+        self.response_type = response_type;
+        match response_type.accept() {
+            Some(accept) => self.header("Accept", accept.as_str()),
+            None => {
+                self.headers.remove("Accept");
+                self
+            }
+        }
+    }
+
+    pub fn auth(mut self, auth: NetAuth) -> Self {
+        self.auth = Some(auth);
+        self
+    }
+
+    pub const fn log(mut self, log: NetRequestLogging) -> Self {
+        self.log = log;
+        self
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use assert2::let_assert;
+    use serde_json::json;
+
+    use crate::network::net_auth::{NetAuthPassword, NetAuthUsername};
+
+    use super::*;
+
+    #[test_log::test]
+    fn test_as_curl_no_auth() {
+        let request = NetRequest::get(NetUrl("https://httpbin.org/get".to_string())).build();
+        let_assert!(Ok(curl) = request.as_curl());
+        assert_eq!(
+            curl,
+            "curl -X GET https://httpbin.org/get -H 'Accept: application/json'".to_string()
+        );
+    }
+    #[test_log::test]
+    fn test_as_curl_auth() {
+        let request = NetRequest::get(NetUrl("https://httpbin.org/get".to_string()))
+            .auth(NetAuth::new(
+                NetAuthUsername::new("user".into()),
+                NetAuthPassword::new("pass".into()),
+            ))
+            .build();
+        let_assert!(Ok(curl) = request.as_curl());
+        assert_eq!(
+            curl,
+            "curl -X GET https://httpbin.org/get -H 'Accept: application/json' -u user:pass"
+                .to_string()
+        );
+    }
+    #[test_log::test]
+    fn test_as_curl_no_auth_post_json() -> Result<(), serde_json::Error> {
+        let request = NetRequest::post(NetUrl("https://httpbin.org/post".to_string()))
+            .json_body(json!({
+                "args": {},
+                "url": "https://httpbin.org/post",
+            }))?
+            .build();
+        let_assert!(Ok(curl) = request.as_curl());
+        assert_eq!(
+            curl,
+            "curl -X POST https://httpbin.org/post -H 'Accept: application/json' -H 'Content-Type: application/json' -d '{\"args\":{},\"url\":\"https://httpbin.org/post\"}'".to_string()
+        );
+        Ok(())
+    }
+    #[test_log::test]
+    fn test_as_curl_no_auth_post_text() {
+        let request = NetRequest::post(NetUrl("https://httpbin.org/post".to_string()))
+            .string_body("body".to_string())
+            .build();
+        let_assert!(Ok(curl) = request.as_curl());
+        assert_eq!(
+            curl,
+            "curl -X POST https://httpbin.org/post -H 'Accept: text/plain' -H 'Content-Type: text/plain' -d 'body'".to_string()
+        );
+    }
+
+    #[test_log::test]
+    fn test_as_curl_no_auth_put() -> Result<(), serde_json::Error> {
+        let request = NetRequest::put(NetUrl("https://httpbin.org/put".to_string()))
+            .json_body(json!({
+                "args": {},
+                "url": "https://httpbin.org/put",
+            }))?
+            .build();
+        let_assert!(Ok(curl) = request.as_curl());
+        assert_eq!(
+            curl,
+            "curl -X PUT https://httpbin.org/put -H 'Accept: application/json' -H 'Content-Type: application/json' -d '{\"args\":{},\"url\":\"https://httpbin.org/put\"}'".to_string()
+        );
+        Ok(())
+    }
+
+    #[test_log::test]
+    fn test_as_curl_no_auth_delete() {
+        let request = NetRequest::delete(NetUrl("https://httpbin.org/delete".to_string())).build();
+        let_assert!(Ok(curl) = request.as_curl());
+        assert_eq!(
+            curl,
+            "curl -X DELETE https://httpbin.org/delete".to_string()
+        );
+    }
+
+    #[test_log::test]
+    fn test_as_curl_no_auth_put_xml() {
+        let request = NetRequest::put(NetUrl("https://httpbin.org/put".to_string()))
+            .xml_body("<xml/>")
+            .build();
+        let_assert!(Ok(curl) = request.as_curl());
+        assert_eq!(
+            curl,
+            "curl -X PUT https://httpbin.org/put -H 'Accept: application/json' -H 'Content-Type: application/xml' -d '<xml/>'"
+                .to_string()
+        );
+    }
+
+    #[test_log::test]
+    fn test_as_curl_accept_json() {
+        let request = NetRequest::get(NetUrl("https://httpbin.org/get".to_string())).build();
+        let_assert!(Ok(curl) = request.as_curl());
+        assert_eq!(
+            curl,
+            "curl -X GET https://httpbin.org/get -H 'Accept: application/json'".to_string()
+        );
+    }
+
+    #[test_log::test]
+    fn test_as_curl_accept_xml() {
+        let request = NetRequest::get(NetUrl("https://httpbin.org/get".to_string()))
+            .response_type(ResponseType::Xml)
+            .build();
+        let_assert!(Ok(curl) = request.as_curl());
+        assert_eq!(
+            curl,
+            "curl -X GET https://httpbin.org/get -H 'Accept: application/xml'".to_string()
+        );
+    }
+
+    #[test_log::test]
+    fn test_as_curl_accept_text() {
+        let request = NetRequest::get(NetUrl("https://httpbin.org/get".to_string()))
+            .response_type(ResponseType::Text)
+            .build();
+        let_assert!(Ok(curl) = request.as_curl());
+        assert_eq!(
+            curl,
+            "curl -X GET https://httpbin.org/get -H 'Accept: text/plain'".to_string()
+        );
+    }
+
+    #[test_log::test]
+    fn text_as_curl_accept_none() {
+        let request = NetRequest::get(NetUrl("https://httpbin.org/get".to_string()))
+            .response_type(ResponseType::None)
+            .build();
+        let_assert!(Ok(curl) = request.as_curl());
+        assert_eq!(curl, "curl -X GET https://httpbin.org/get".to_string());
+    }
+
+    #[test_log::test]
+    fn test_as_curl_with_headers() {
+        let request = NetRequest::get(NetUrl("https://httpbin.org/get".to_string()))
+            .header("header1", "value1")
+            .header("header2", "value2")
+            .build();
+        let_assert!(Ok(curl) = request.as_curl());
+        assert!(curl.contains("-H 'header1: value1'"));
+        assert!(curl.contains("-H 'header2: value2'"));
+        assert!(curl.starts_with("curl -X GET https://httpbin.org/get"));
+    }
+
+    #[test_log::test]
+    fn test_net_request_headers() {
+        let request = NetRequest::get(NetUrl("https://httpbin.org/get".to_string()))
+            .header("header1", "value1")
+            .header("header2", "value2")
+            .build();
+        let headers = request.headers();
+        assert!(headers.len() >= 2);
+        let_assert!(Some(value1) = headers.get("header1"));
+        assert_eq!(value1, "value1");
+        let_assert!(Some(value2) = headers.get("header2"));
+        assert_eq!(value2, "value2");
+    }
+
+    #[test_log::test]
+    fn test_as_curl_propfind() {
+        let request =
+            NetRequest::propfind(NetUrl("https://httpbin.org/propfind".to_string())).build();
+        let_assert!(Ok(curl) = request.as_curl());
+        assert_eq!(
+            curl,
+            "curl -X PROPFIND https://httpbin.org/propfind".to_string()
+        );
+    }
+
+    #[test_log::test]
+    fn test_as_trace() {
+        let request = NetRequest::get(NetUrl("https://httpbin.org/get".to_string())).build();
+        assert_eq!(request.as_trace(), "GET https://httpbin.org/get");
+    }
+}

src/network/net_request_headers.rs

@@ -0,0 +1,102 @@
+use std::{
+    collections::HashMap,
+    ops::{Deref, DerefMut},
+};
+
+use crate::network::HeaderMap;
+
+#[derive(Debug, Default, PartialEq, Eq)]
+pub struct NetRequestHeaders(HashMap<String, String>);
+impl NetRequestHeaders {
+    pub fn new() -> Self {
+        Self::default() //(HashMap::new())
+    }
+    pub fn with(mut self, key: &str, value: &str) -> Self {
+        self.0.insert(key.into(), value.into());
+        self
+    }
+}
+impl<T> From<T> for NetRequestHeaders
+where
+    T: Into<HashMap<String, String>>,
+{
+    fn from(x: T) -> Self {
+        Self(x.into())
+    }
+}
+impl TryFrom<NetRequestHeaders> for HeaderMap {
+    type Error = http::Error;
+    fn try_from(x: NetRequestHeaders) -> Result<Self, Self::Error> {
+        Self::try_from(&x.0)
+    }
+}
+impl Deref for NetRequestHeaders {
+    type Target = HashMap<String, String>;
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+impl DerefMut for NetRequestHeaders {
+    fn deref_mut(&mut self) -> &mut Self::Target {
+        &mut self.0
+    }
+}
+
+#[cfg(test)]
+mod tests {
+
+    use assert2::let_assert;
+    use pretty_assertions::assert_eq;
+
+    use super::*;
+
+    #[test_log::test]
+    fn test_net_request_headers_from_hash_map() {
+        let nrh = NetRequestHeaders::from(
+            [("a", "b"), ("c", "d")]
+                .iter()
+                .map(|(k, v)| (k.to_string(), v.to_string()))
+                .collect::<HashMap<_, _>>(),
+        );
+        assert_eq!(nrh.len(), 2);
+        let_assert!(Some(a) = nrh.get("a"));
+        assert_eq!(a, "b");
+        let_assert!(Some(c) = nrh.get("c"));
+        assert_eq!(c, "d");
+    }
+
+    #[test_log::test]
+    fn test_net_request_headers_with_new_entry() {
+        let nrh = NetRequestHeaders::from(
+            [("a", "b"), ("c", "d")]
+                .iter()
+                .map(|(k, v)| (k.to_string(), v.to_string()))
+                .collect::<HashMap<_, _>>(),
+        )
+        .with("e", "f");
+        assert_eq!(nrh.len(), 3);
+        let_assert!(Some(a) = nrh.get("a"));
+        assert_eq!(a, "b");
+        let_assert!(Some(c) = nrh.get("c"));
+        assert_eq!(c, "d");
+        let_assert!(Some(e) = nrh.get("e"));
+        assert_eq!(e, "f");
+    }
+
+    #[test_log::test]
+    fn test_net_request_headers_try_into_header_map() {
+        let result: Result<HeaderMap, ReqwestError> = NetRequestHeaders::from(
+            [("a", "b"), ("c", "d")]
+                .iter()
+                .map(|(k, v)| (k.to_string(), v.to_string()))
+                .collect::<HashMap<_, _>>(),
+        )
+        .try_into();
+        let_assert!(Ok(hm) = result);
+        assert_eq!(hm.len(), 2);
+        let_assert!(Some(a) = hm.get("a"));
+        assert_eq!(a, "b");
+        let_assert!(Some(c) = hm.get("c"));
+        assert_eq!(c, "d");
+    }
+}

src/network/net_response.rs

@@ -0,0 +1,38 @@
+use crate::network::StatusCode;
+
+use super::{net_request::NetUrl, RequestMethod};
+
+#[derive(Debug)]
+pub struct NetResponse<T> {
+    method: RequestMethod,
+    request_url: NetUrl,
+    status_code: StatusCode,
+    response_body: Option<T>,
+}
+impl<T> NetResponse<T> {
+    pub fn new(
+        method: RequestMethod,
+        request_url: &NetUrl,
+        status_code: StatusCode,
+        response_body: Option<T>,
+    ) -> Self {
+        Self {
+            method,
+            request_url: request_url.clone(),
+            status_code,
+            response_body,
+        }
+    }
+    pub const fn method(&self) -> &RequestMethod {
+        &self.method
+    }
+    pub const fn request_url(&self) -> &NetUrl {
+        &self.request_url
+    }
+    pub const fn status_code(&self) -> StatusCode {
+        self.status_code
+    }
+    pub fn response_body(self) -> Option<T> {
+        self.response_body
+    }
+}

src/network/network_env.rs

@@ -0,0 +1,174 @@
+use async_trait::async_trait;
+use serde::de::DeserializeOwned;
+
+use crate::network::{MockNetwork, NetRequest, NetworkError, RealNetwork, SavedRequest};
+
+use super::NetResponse;
+
+#[derive(Debug, Clone)]
+pub enum Network {
+    Mock(MockNetwork),
+    Real(RealNetwork),
+}
+impl Network {
+    pub fn new_mock() -> Self {
+        Self::Mock(MockNetwork::default())
+    }
+
+    pub fn new_real() -> Self {
+        Self::Real(RealNetwork::default())
+    }
+
+    pub async fn get<T: DeserializeOwned + std::fmt::Debug>(
+        &self,
+        net_request: NetRequest,
+    ) -> Result<NetResponse<T>, NetworkError> {
+        match self {
+            Self::Mock(mock) => mock.get(net_request).await,
+            Self::Real(real) => real.get(net_request).await,
+        }
+    }
+
+    pub async fn get_string(
+        &self,
+        net_request: NetRequest,
+    ) -> Result<NetResponse<String>, NetworkError> {
+        match self {
+            Self::Mock(mock) => mock.get_string(net_request).await,
+            Self::Real(real) => real.get_string(net_request).await,
+        }
+    }
+
+    pub async fn post_json<Reply: DeserializeOwned + std::fmt::Debug>(
+        &self,
+        net_request: NetRequest,
+    ) -> Result<NetResponse<Reply>, NetworkError> {
+        match self {
+            Self::Mock(mock) => mock.post_json(net_request).await,
+            Self::Real(real) => real.post_json(net_request).await,
+        }
+    }
+
+    pub async fn post_string(
+        &self,
+        net_request: NetRequest,
+    ) -> Result<NetResponse<String>, NetworkError> {
+        match self {
+            Self::Mock(mock) => mock.post_string(net_request).await,
+            Self::Real(real) => real.post_string(net_request).await,
+        }
+    }
+
+    pub async fn put_json<Reply: DeserializeOwned + std::fmt::Debug>(
+        &self,
+        net_request: NetRequest,
+    ) -> Result<NetResponse<Reply>, NetworkError> {
+        match self {
+            Self::Mock(mock) => mock.put_json(net_request).await,
+            Self::Real(real) => real.put_json(net_request).await,
+        }
+    }
+
+    pub async fn put_string(
+        &self,
+        net_request: NetRequest,
+    ) -> Result<NetResponse<String>, NetworkError> {
+        match self {
+            Self::Mock(mock) => mock.put_string(net_request).await,
+            Self::Real(real) => real.put_string(net_request).await,
+        }
+    }
+
+    pub async fn patch_json<Reply: DeserializeOwned + std::fmt::Debug>(
+        &self,
+        net_request: NetRequest,
+    ) -> Result<NetResponse<Reply>, NetworkError> {
+        match self {
+            Self::Mock(mock) => mock.patch_json(net_request).await,
+            Self::Real(real) => real.patch_json(net_request).await,
+        }
+    }
+
+    pub async fn delete(&self, net_request: NetRequest) -> Result<NetResponse<()>, NetworkError> {
+        match self {
+            Self::Mock(mock) => mock.delete(net_request).await,
+            Self::Real(real) => real.delete(net_request).await,
+        }
+    }
+
+    pub async fn propfind<Reply: DeserializeOwned + std::fmt::Debug>(
+        &self,
+        net_request: NetRequest,
+    ) -> Result<NetResponse<Reply>, NetworkError> {
+        match self {
+            Self::Mock(mock) => mock.propfind(net_request).await,
+            Self::Real(real) => real.propfind(net_request).await,
+        }
+    }
+
+    pub async fn propfind_string(
+        &self,
+        net_request: NetRequest,
+    ) -> Result<NetResponse<String>, NetworkError> {
+        match self {
+            Self::Mock(mock) => mock.propfind_string(net_request).await,
+            Self::Real(real) => real.propfind_string(net_request).await,
+        }
+    }
+
+    pub fn mocked_requests(&self) -> Option<Vec<SavedRequest>> {
+        match self {
+            Self::Mock(mock) => Some(mock.requests()),
+            Self::Real(_) => None,
+        }
+    }
+}
+#[async_trait]
+pub(super) trait NetworkTrait: Sync + Send + Clone + std::fmt::Debug {
+    async fn get<T: DeserializeOwned + std::fmt::Debug>(
+        &self,
+        net_request: NetRequest,
+    ) -> Result<NetResponse<T>, NetworkError>;
+
+    async fn get_string(
+        &self,
+        net_request: NetRequest,
+    ) -> Result<NetResponse<String>, NetworkError>;
+
+    async fn post_json<Reply: DeserializeOwned + std::fmt::Debug>(
+        &self,
+        net_request: NetRequest,
+    ) -> Result<NetResponse<Reply>, NetworkError>;
+
+    async fn post_string(
+        &self,
+        net_request: NetRequest,
+    ) -> Result<NetResponse<String>, NetworkError>;
+
+    async fn put_json<Reply: DeserializeOwned + std::fmt::Debug>(
+        &self,
+        net_request: NetRequest,
+    ) -> Result<NetResponse<Reply>, NetworkError>;
+
+    async fn put_string(
+        &self,
+        net_request: NetRequest,
+    ) -> Result<NetResponse<String>, NetworkError>;
+
+    async fn patch_json<Reply: DeserializeOwned + std::fmt::Debug>(
+        &self,
+        net_request: NetRequest,
+    ) -> Result<NetResponse<Reply>, NetworkError>;
+
+    async fn delete(&self, net_request: NetRequest) -> Result<NetResponse<()>, NetworkError>;
+
+    async fn propfind<Reply: DeserializeOwned + std::fmt::Debug>(
+        &self,
+        net_request: NetRequest,
+    ) -> Result<NetResponse<Reply>, NetworkError>;
+
+    async fn propfind_string(
+        &self,
+        net_request: NetRequest,
+    ) -> Result<NetResponse<String>, NetworkError>;
+}

src/network/network_error.rs

@@ -0,0 +1,56 @@
+#[derive(thiserror::Error, Debug)]
+pub enum NetworkError {
+    #[error(transparent)]
+    Reqwest(#[from] crate::network::ReqwestError),
+
+    #[error(transparent)]
+    SerdeJson(#[from] serde_json::Error),
+
+    #[error(transparent)]
+    SerdeXml(#[from] serde_xml_rs::Error),
+
+    #[error(transparent)]
+    HttpMethod(#[from] http::method::InvalidMethod),
+
+    #[error(transparent)]
+    Http(#[from] http::Error),
+
+    #[error("{0} failed: {1} ({2})")]
+    RequestFailed(super::RequestMethod, super::StatusCode, super::NetUrl),
+
+    #[error("{0} failed: {1} ({2})")]
+    MockError(super::RequestMethod, super::StatusCode, super::NetUrl),
+
+    #[error("missing response body")]
+    MissingResponseBody,
+
+    #[error("unexpected mock request: {method:?} {request_url}")]
+    UnexpectedMockRequest {
+        method: super::RequestMethod,
+        request_url: super::NetUrl,
+    },
+
+    #[error("{0} failed: {1} ({2})")]
+    RequestError(super::RequestMethod, super::StatusCode, super::NetUrl),
+
+    #[error("invalid response type")]
+    InvalidResponseType,
+
+    #[error("invalid request body")]
+    InvalidRequestBody,
+
+    #[error("response body is empty")]
+    EmptyResponseBody,
+}
+
+#[cfg(test)]
+mod tests {
+    use super::NetworkError;
+
+    #[test]
+    const fn test_network_error_is_send() {
+        const fn assert_send<T: Send>() {}
+        assert_send::<NetworkError>();
+        assert_send::<Result<(), NetworkError>>();
+    }
+}

src/network/real.rs

@@ -0,0 +1,612 @@
+use reqwest::RequestBuilder;
+use serde::de::DeserializeOwned;
+use tracing::{event, Level};
+
+use super::{
+    network_env::NetworkTrait, NetAuth, NetRequest, NetRequestLogging, NetResponse, Network,
+    NetworkError, RequestMethod, ResponseType, StatusCode,
+};
+
+trait WithAuthentiction {
+    fn auth(self, auth: Option<NetAuth>) -> reqwest::RequestBuilder;
+}
+impl WithAuthentiction for reqwest::RequestBuilder {
+    fn auth(self, auth: Option<NetAuth>) -> reqwest::RequestBuilder {
+        if let Some(auth) = auth {
+            self.basic_auth(
+                auth.username().to_string(),
+                Some(auth.password().expose_password()),
+            )
+        } else {
+            self
+        }
+    }
+}
+
+trait WithResponseType {
+    fn response_type(self, response_type: ResponseType) -> Self;
+}
+impl WithResponseType for reqwest::RequestBuilder {
+    fn response_type(self, response_type: ResponseType) -> Self {
+        match response_type {
+            ResponseType::Json => self.header(reqwest::header::ACCEPT, "application/json"),
+            ResponseType::Xml => self.header(reqwest::header::ACCEPT, "application/xml"),
+            ResponseType::Text => self.header(reqwest::header::ACCEPT, "text/plain"),
+            ResponseType::None => self,
+        }
+    }
+}
+
+#[derive(Debug, Clone)]
+pub struct RealNetwork {
+    client: reqwest::Client,
+}
+impl RealNetwork {
+    #[cfg(not(tarpaulin_include))]
+    pub fn new() -> Self {
+        Self {
+            client: reqwest::Client::new(),
+        }
+    }
+
+    async fn send<T: DeserializeOwned + std::fmt::Debug>(
+        &self,
+        request: RequestBuilder,
+        net_request: NetRequest,
+    ) -> Result<NetResponse<T>, NetworkError> {
+        let response = request.send().await?;
+        let status_code = response.status();
+        let text = response.text().await?;
+        if status_code.is_success() {
+            tracing::trace!(status = ?status_code);
+        } else {
+            tracing::error!("Request failed");
+            self.log_request(&net_request);
+            self.log_response(&net_request, &status_code, text.as_str());
+            return Err(NetworkError::RequestFailed(
+                net_request.method(),
+                status_code,
+                net_request.url().clone(),
+            ));
+        }
+        match net_request.response_type() {
+            ResponseType::Json => serde_json::from_str(text.as_str())
+                .map(Some)
+                .map_err(NetworkError::from),
+            ResponseType::Xml => serde_xml_rs::from_str(text.as_str())
+                .map(Some)
+                .map_err(NetworkError::from),
+            ResponseType::Text => {
+                panic!("text response type not implemented - use send_for_text(...) instead")
+            }
+            ResponseType::None => Ok(None),
+        }
+        .map(|response_body| {
+            match net_request.log() {
+                NetRequestLogging::None => (),
+                NetRequestLogging::Request => self.log_request(&net_request),
+                NetRequestLogging::Response => {
+                    self.log_response(&net_request, &status_code, text.as_str());
+                }
+                NetRequestLogging::Both => {
+                    self.log_request(&net_request);
+                    self.log_response(&net_request, &status_code, text.as_str());
+                }
+            };
+            NetResponse::new(
+                net_request.method(),
+                net_request.url(),
+                status_code,
+                response_body,
+            )
+        })
+    }
+
+    async fn send_for_text(
+        &self,
+        request: RequestBuilder,
+        net_request: NetRequest,
+    ) -> Result<NetResponse<String>, NetworkError> {
+        let response = request.send().await?;
+        let status_code = response.status();
+        if status_code.is_success() {
+            tracing::trace!(status = ?status_code);
+        } else {
+            tracing::error!(status = ?status_code, request = ?net_request);
+        }
+        match net_request.response_type() {
+            ResponseType::Text => {
+                let text = response.text().await?;
+                Ok(Some(text))
+            }
+            _ => panic!("text response type not implemented - use send(...) instead"),
+        }
+        .map(|response_body| {
+            NetResponse::new(
+                net_request.method(),
+                net_request.url(),
+                status_code,
+                response_body,
+            )
+        })
+    }
+
+    fn log_request(&self, net_request: &NetRequest) {
+        tracing::info!(?net_request, "RealNetworkEnv::request");
+    }
+
+    fn log_response(
+        &self,
+        net_request: &NetRequest,
+        status_code: &StatusCode,
+        response_body: &str,
+    ) {
+        tracing::info!(
+            ?net_request,
+            status = ?status_code,
+            ?response_body,
+            "RealNetworkEnv::response"
+        );
+    }
+}
+
+impl Default for RealNetwork {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+impl From<RealNetwork> for Network {
+    fn from(real: RealNetwork) -> Self {
+        Self::Real(real)
+    }
+}
+
+#[cfg(not(tarpaulin_include))]
+#[async_trait::async_trait]
+impl NetworkTrait for RealNetwork {
+    #[tracing::instrument(skip_all, fields(request = %net_request.as_trace()), level = "trace")]
+    async fn get<T: DeserializeOwned + std::fmt::Debug>(
+        &self,
+        net_request: NetRequest,
+    ) -> Result<NetResponse<T>, NetworkError> {
+        tracing::info!("RealNetworkEnv::get({:?})", net_request);
+        let url = net_request.url();
+        let auth = net_request.auth();
+        let response_type = net_request.response_type();
+        let headers = net_request.headers();
+
+        let request = self
+            .client
+            .get(url.to_string())
+            .auth(auth)
+            .response_type(response_type)
+            .headers(headers);
+        self.send(request, net_request).await
+    }
+
+    #[tracing::instrument(skip_all, fields(request = %net_request.as_trace()), level = "trace")]
+    async fn post_json<Reply: DeserializeOwned + std::fmt::Debug>(
+        &self,
+        net_request: NetRequest,
+    ) -> Result<NetResponse<Reply>, NetworkError> {
+        // event!(Level::INFO, "RealNetworkEnv::post_json({:?})", net_request);
+        let url = net_request.url();
+        let body = net_request.body();
+        let auth = net_request.auth();
+        let response_type = net_request.response_type();
+        let headers = net_request.headers();
+
+        let body = String::try_from(body)?;
+
+        let request = self
+            .client
+            .post(url.to_string())
+            .body(body)
+            .auth(auth)
+            .response_type(response_type)
+            .headers(headers);
+        self.send(request, net_request).await
+    }
+
+    #[tracing::instrument(skip_all, fields(request = %net_request.as_trace()), level = "trace")]
+    async fn post_string(
+        &self,
+        net_request: NetRequest,
+    ) -> Result<NetResponse<String>, NetworkError> {
+        // event!(Level::INFO, "RealNetworkEnv::post_string({:?})", net_request);
+        let url = net_request.url();
+        let body = net_request.body();
+        let auth = net_request.auth();
+        let response_type = net_request.response_type();
+        let headers = net_request.headers();
+
+        let body = String::try_from(body)?;
+
+        let request = self
+            .client
+            .post(url.to_string())
+            .body(body)
+            .auth(auth)
+            .response_type(response_type)
+            .headers(headers);
+
+        self.send_for_text(request, net_request).await
+    }
+
+    #[tracing::instrument(skip_all, fields(request = %net_request.as_trace()), level = "trace")]
+    async fn put_json<Reply: DeserializeOwned + std::fmt::Debug>(
+        &self,
+        net_request: NetRequest,
+    ) -> Result<NetResponse<Reply>, NetworkError> {
+        // event!(Level::INFO, "RealNetworkEnv::put_json({:?})", net_request);
+        let url = net_request.url();
+        let body = net_request.body();
+        let auth = net_request.auth();
+        let response_type = net_request.response_type();
+        let headers = net_request.headers();
+
+        let body = String::try_from(body)?;
+
+        let request = self
+            .client
+            .put(url.to_string())
+            .body(body)
+            .auth(auth)
+            .response_type(response_type)
+            .headers(headers);
+
+        self.send(request, net_request).await
+    }
+
+    #[tracing::instrument(skip_all, fields(request = %net_request.as_trace()), level = "trace")]
+    async fn put_string(
+        &self,
+        net_request: NetRequest,
+    ) -> Result<NetResponse<String>, NetworkError> {
+        // event!(Level::INFO, "RealNetworkEnv::put_string({:?})", net_request);
+        let url = net_request.url();
+        let body = net_request.body();
+        let auth = net_request.auth();
+        let response_type = net_request.response_type();
+        let headers = net_request.headers();
+
+        let body = String::try_from(body)?;
+
+        let request = self
+            .client
+            .put(url.to_string())
+            .body(body)
+            .auth(auth)
+            .response_type(response_type)
+            .headers(headers);
+
+        self.send_for_text(request, net_request).await
+    }
+
+    #[tracing::instrument(skip_all, fields(request = %net_request.as_trace()), level = "trace")]
+    async fn patch_json<Reply: DeserializeOwned + std::fmt::Debug>(
+        &self,
+        net_request: NetRequest,
+    ) -> Result<NetResponse<Reply>, NetworkError> {
+        // event!(Level::INFO, "RealNetworkEnv::put_json({:?})", net_request);
+        let url = net_request.url();
+        let body = net_request.body();
+        let auth = net_request.auth();
+        let response_type = net_request.response_type();
+        let headers = net_request.headers();
+
+        let body = String::try_from(body)?;
+
+        let request = self
+            .client
+            .patch(url.to_string())
+            .body(body)
+            .auth(auth)
+            .response_type(response_type)
+            .headers(headers);
+
+        self.send(request, net_request).await
+    }
+
+    #[tracing::instrument(skip_all, fields(request = %net_request.as_trace()), level = "trace")]
+    async fn delete(&self, net_request: NetRequest) -> Result<NetResponse<()>, NetworkError> {
+        // event!(Level::INFO, "RealNetworkEnv::delete({:?})", net_request);
+        let url = net_request.url();
+        let auth = net_request.auth();
+        let response_type = net_request.response_type();
+        let headers = net_request.headers();
+
+        let request = self
+            .client
+            .delete(url.to_string())
+            .auth(auth)
+            .response_type(response_type)
+            .headers(headers);
+
+        self.send(request, net_request).await
+    }
+
+    #[tracing::instrument(skip_all, fields(request = %net_request.as_trace()), level = "trace")]
+    async fn propfind<Reply: DeserializeOwned + std::fmt::Debug>(
+        &self,
+        net_request: NetRequest,
+    ) -> Result<NetResponse<Reply>, NetworkError> {
+        // event!(Level::INFO, "RealNetworkEnv::propfind({:?})", net_request);
+        let url = net_request.url();
+        let auth = net_request.auth();
+        let response_type = net_request.response_type();
+        let headers = net_request.headers();
+
+        let request = self
+            .client
+            .request(reqwest::Method::from_bytes(b"PROPFIND")?, url.to_string())
+            .auth(auth)
+            .response_type(response_type)
+            .headers(headers);
+
+        let response = request.send().await?;
+
+        let status_code = response.status();
+        event!(Level::TRACE, status = %status_code);
+        let body = match response_type {
+            ResponseType::Xml => serde_xml_rs::from_str(response.text().await?.as_str()),
+            _ => Err(NetworkError::InvalidResponseType)?,
+        };
+        body.map_err(Into::into).map(|response_body| {
+            NetResponse::new(RequestMethod::Propfind, url, status_code, response_body)
+        })
+    }
+
+    #[tracing::instrument(skip_all, fields(request = %net_request.as_trace()), level = "trace")]
+    async fn get_string(
+        &self,
+        net_request: NetRequest,
+    ) -> Result<NetResponse<String>, NetworkError> {
+        // event!(Level::INFO, "RealNetworkEnv::get_string({:?})", net_request);
+        let url = net_request.url();
+        let auth = net_request.auth();
+        let response_type = net_request.response_type();
+        let headers = net_request.headers();
+
+        let request = self
+            .client
+            .get(url.to_string())
+            .auth(auth)
+            .response_type(response_type)
+            .headers(headers);
+
+        self.send_for_text(request, net_request).await
+    }
+
+    #[tracing::instrument(skip_all, fields(request = %net_request.as_trace()), level = "trace")]
+    async fn propfind_string(
+        &self,
+        net_request: NetRequest,
+    ) -> Result<NetResponse<String>, NetworkError> {
+        // event!(Level::INFO, "RealNetworkEnv::propfind_string({:?})", net_request);
+        let url = net_request.url();
+        let auth = net_request.auth();
+        let response_type = net_request.response_type();
+        let headers = net_request.headers();
+
+        let request = self
+            .client
+            .request(reqwest::Method::from_bytes(b"PROPFIND")?, url.to_string())
+            .auth(auth)
+            .response_type(response_type)
+            .headers(headers);
+
+        self.send_for_text(request, net_request).await
+    }
+}
+
+#[cfg(test)]
+mod tests {
+
+    use super::*;
+
+    use crate::network::{
+        net_auth::{NetAuthPassword, NetAuthUsername},
+        NetUrl, NetworkError, StatusCode,
+    };
+
+    use assert2::let_assert;
+    use pretty_assertions::assert_eq;
+    use std::collections::HashMap;
+    use tokio_test::block_on;
+
+    #[derive(Debug, PartialEq, Eq, serde::Deserialize)]
+    pub struct GetResponse {
+        pub args: HashMap<String, String>,
+        pub url: String,
+    }
+
+    #[derive(Debug, PartialEq, Eq, serde::Deserialize)]
+    pub struct PostResponse {
+        pub args: HashMap<String, String>,
+        pub url: String,
+        pub data: String,
+    }
+
+    #[derive(Debug, PartialEq, Eq, serde::Deserialize)]
+    pub struct PutResponse {
+        pub args: HashMap<String, String>,
+        pub url: String,
+        pub data: String,
+    }
+
+    #[test_log::test]
+    fn test_with_authentication_none() {
+        let client = reqwest::Client::new();
+        let request = client.get("https://httpbin.org/get").auth(None);
+        let_assert!(Ok(build) = request.build());
+        assert!(build.headers().is_empty());
+    }
+
+    #[test_log::test]
+    fn test_with_authentication_some() {
+        let client = reqwest::Client::new();
+        let request = client
+            .get("https://httpbin.org/get")
+            .auth(Some(NetAuth::new(
+                NetAuthUsername::new("user".into()),
+                NetAuthPassword::new("pass".into()),
+            )));
+        let_assert!(Ok(build) = request.build());
+        let headers = build.headers();
+        let_assert!(Some(authorization) = headers.get(reqwest::header::AUTHORIZATION));
+        assert_eq!(authorization, "Basic dXNlcjpwYXNz");
+    }
+
+    #[test_log::test]
+    fn test_with_response_type_json() {
+        let client = reqwest::Client::new();
+        let request = client
+            .get("https://httpbin.org/get")
+            .response_type(ResponseType::Json);
+        let_assert!(Ok(request) = request.build());
+        let headers = request.headers();
+        let_assert!(Some(accept) = headers.get(reqwest::header::ACCEPT));
+        assert_eq!(accept, "application/json");
+    }
+
+    #[test_log::test]
+    fn test_with_response_type_xml() {
+        let client = reqwest::Client::new();
+        let request = client
+            .get("https://httpbin.org/get")
+            .response_type(ResponseType::Xml);
+        let_assert!(Ok(request) = request.build());
+        let headers = request.headers();
+        let_assert!(Some(accept) = headers.get(reqwest::header::ACCEPT));
+        assert_eq!(accept, "application/xml");
+    }
+
+    #[test_log::test]
+    fn test_with_response_type_text() {
+        let client = reqwest::Client::new();
+        let request = client
+            .get("https://httpbin.org/get")
+            .response_type(ResponseType::Text);
+        let_assert!(Ok(request) = request.build());
+        let headers = request.headers();
+        let_assert!(Some(accept) = headers.get(reqwest::header::ACCEPT));
+        assert_eq!(accept, "text/plain");
+    }
+
+    #[test_log::test]
+    fn test_with_response_type_none() {
+        let client = reqwest::Client::new();
+        let request = client
+            .get("https://httpbin.org/get")
+            .response_type(ResponseType::None);
+        let_assert!(Ok(request) = request.build());
+        let headers = request.headers();
+        assert!(headers.get(reqwest::header::ACCEPT).is_none());
+    }
+
+    #[test_log::test]
+    #[ignore]
+    fn test_real_network_env_get() -> Result<(), NetworkError> {
+        let env = RealNetwork::new();
+        let net_request =
+            NetRequest::get(NetUrl::new("https://httpbin.org/get?arg=baz".into())).build();
+        let response: NetResponse<GetResponse> = block_on(env.get(net_request))?;
+        let_assert!(Some(body) = response.response_body());
+        assert_eq!(
+            body.args.get("arg"),
+            Some(&"baz".to_string()),
+            "args from body"
+        );
+        Ok(())
+    }
+
+    #[test_log::test]
+    #[ignore]
+    fn test_real_network_env_get_error() {
+        let env = RealNetwork::new();
+        let net_request =
+            NetRequest::get(NetUrl::new("https://httpbin.org/status/400".into())).build();
+        let result: Result<NetResponse<String>, NetworkError> = block_on(env.get(net_request));
+        assert!(result.is_err(), "response is not a String");
+    }
+
+    #[test_log::test]
+    #[ignore]
+    fn test_real_network_env_post_json() -> Result<(), NetworkError> {
+        let env = RealNetwork::new();
+        let body = serde_json::json!({"foo":"bar"});
+        let net_request = NetRequest::post(NetUrl::new("https://httpbin.org/post?arg=baz".into()))
+            .json_body(body)?
+            .build();
+        let response: NetResponse<PostResponse> = block_on(env.post_json(net_request))?;
+        let_assert!(Some(body) = response.response_body());
+        assert_eq!(
+            body.args.get("arg"),
+            Some(&"baz".to_string()),
+            "args from body"
+        );
+        assert_eq!(body.data, "{\"foo\":\"bar\"}".to_string(), "data from body");
+        Ok(())
+    }
+
+    #[test_log::test]
+    #[ignore]
+    fn test_real_network_env_post_json_error() -> Result<(), NetworkError> {
+        let env = RealNetwork::new();
+        let net_request =
+            NetRequest::post(NetUrl::new("https://httpbin.org/status/400".into())).build();
+        let response: Result<NetResponse<PostResponse>, NetworkError> =
+            block_on(env.post_json(net_request));
+        match response {
+            Ok(_) => panic!("expected error"),
+            Err(e) => match e {
+                NetworkError::MockError(method, status, _url) => {
+                    assert_eq!(method, RequestMethod::Post);
+                    assert_eq!(status, StatusCode::BAD_REQUEST)
+                }
+                _ => panic!("unexpected error type"),
+            },
+        }
+        Ok(())
+    }
+
+    #[test_log::test]
+    #[ignore]
+    fn test_real_network_env_put() -> Result<(), NetworkError> {
+        let env = RealNetwork::new();
+        let body = serde_json::json!({"foo":"bar"});
+        let net_request = NetRequest::put(NetUrl::new("https://httpbin.org/put?arg=baz".into()))
+            .json_body(body)?
+            .build();
+        let response: NetResponse<PutResponse> = block_on(env.put_json(net_request))?;
+        let_assert!(Some(body) = response.response_body());
+        assert_eq!(
+            body.args.get("arg"),
+            Some(&"baz".to_string()),
+            "args from body"
+        );
+        assert_eq!(body.data, "{\"foo\":\"bar\"}".to_string(), "data from body");
+        Ok(())
+    }
+
+    #[test_log::test]
+    #[ignore]
+    fn test_real_network_env_put_error() {
+        let env = RealNetwork::new();
+        let net_request =
+            NetRequest::put(NetUrl::new("https://httpbin.org/status/400".into())).build();
+        let result: Result<NetResponse<String>, NetworkError> = block_on(env.put_json(net_request));
+        assert!(result.is_err(), "response is not a String");
+    }
+
+    #[test_log::test]
+    #[ignore]
+    fn test_real_network_env_delete() {
+        let env = RealNetwork::new();
+        let net_request =
+            NetRequest::delete(NetUrl::new("https://httpbin.org/delete?arg=baz".into())).build();
+        let result = block_on(env.delete(net_request));
+        assert!(result.is_ok());
+    }
+}

src/network/request_body.rs

@@ -0,0 +1,86 @@
+use serde::Serialize;
+
+#[derive(Clone, Debug, PartialEq, Eq)]
+pub enum RequestBody {
+    None,
+    String(String),
+    Json(serde_json::Value),
+    Xml(String), // no separate type for XML, so store as string
+}
+impl Default for RequestBody {
+    fn default() -> Self {
+        Self::None
+    }
+}
+impl TryFrom<&RequestBody> for String {
+    type Error = serde_json::Error;
+    fn try_from(value: &RequestBody) -> Result<Self, Self::Error> {
+        match value {
+            RequestBody::None => Ok("".to_string()),
+            RequestBody::String(s) => Ok(s.to_string()),
+            RequestBody::Json(json) => serde_json::to_string(&json),
+            RequestBody::Xml(s) => Ok(s.to_string()),
+        }
+    }
+}
+impl RequestBody {
+    pub fn json<T: Serialize>(source: T) -> Result<Self, serde_json::Error> {
+        serde_json::to_value(source).map(Self::Json)
+    }
+    pub fn content_type(&self) -> Option<String> {
+        match self {
+            Self::None => None,
+            Self::String(_) => Some("text/plain".to_string()),
+            Self::Json(_) => Some("application/json".to_string()),
+            Self::Xml(_) => Some("application/xml".to_string()),
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+
+    use assert2::let_assert;
+    use pretty_assertions::assert_eq;
+    use serde_json::json;
+
+    use super::*;
+
+    #[test_log::test]
+    fn test_request_body_json() {
+        let_assert!(Ok(json) = RequestBody::json("hello"));
+        assert_eq!(
+            json,
+            RequestBody::Json(serde_json::Value::String("hello".to_string()))
+        );
+    }
+
+    #[test_log::test]
+    fn test_request_body_content_type() {
+        assert_eq!(RequestBody::None.content_type(), None);
+        assert_eq!(
+            RequestBody::String("".to_string()).content_type(),
+            Some("text/plain".to_string())
+        );
+        assert_eq!(
+            RequestBody::Json(json!("")).content_type(),
+            Some("application/json".to_string())
+        );
+        assert_eq!(
+            RequestBody::Xml("".to_string()).content_type(),
+            Some("application/xml".to_string())
+        );
+    }
+
+    #[test_log::test]
+    fn test_request_body_try_from() {
+        let_assert!(Ok(value) = String::try_from(&RequestBody::None));
+        assert_eq!(value, "");
+        let_assert!(Ok(value) = String::try_from(&RequestBody::String("hello".to_string())));
+        assert_eq!(value, "hello");
+        let_assert!(Ok(value) = String::try_from(&RequestBody::Json(json!("hello"))));
+        assert_eq!(value, "\"hello\"");
+        let_assert!(Ok(value) = String::try_from(&RequestBody::Xml("hello".to_string())));
+        assert_eq!(value, "hello");
+    }
+}

src/network/request_method.rs

@@ -0,0 +1,26 @@
+#[derive(Debug, PartialEq, Eq, Clone, Copy)]
+pub enum RequestMethod {
+    Get,
+    Post,
+    Put,
+    Patch,
+    Delete,
+    Propfind,
+}
+impl Default for RequestMethod {
+    fn default() -> Self {
+        Self::Get
+    }
+}
+impl std::fmt::Display for RequestMethod {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            Self::Get => write!(f, "GET"),
+            Self::Post => write!(f, "POST"),
+            Self::Put => write!(f, "PUT"),
+            Self::Patch => write!(f, "PATCH"),
+            Self::Delete => write!(f, "DELETE"),
+            Self::Propfind => write!(f, "PROPFIND"),
+        }
+    }
+}

src/network/response_type.rs

@@ -0,0 +1,22 @@
+#[derive(Debug, PartialEq, Eq, Clone, Copy)]
+pub enum ResponseType {
+    Json,
+    Xml,
+    None,
+    Text,
+}
+impl ResponseType {
+    pub fn accept(&self) -> Option<String> {
+        match self {
+            Self::Json => Some("application/json".to_string()),
+            Self::Text => Some("text/plain".to_string()),
+            Self::Xml => Some("application/xml".to_string()),
+            Self::None => None,
+        }
+    }
+}
+impl Default for ResponseType {
+    fn default() -> Self {
+        Self::Json
+    }
+}

src/network/saved_request.rs

@@ -0,0 +1,113 @@
+use super::{RequestBody, RequestMethod};
+
+#[derive(Clone, Debug, PartialEq, Eq)]
+pub struct SavedRequest {
+    method: RequestMethod,
+    url: String,
+    body: RequestBody,
+}
+impl SavedRequest {
+    pub fn new(method: RequestMethod, url: &str, body: RequestBody) -> Self {
+        Self {
+            method,
+            url: url.to_string(),
+            body,
+        }
+    }
+    pub const fn method(&self) -> RequestMethod {
+        self.method
+    }
+    pub fn url(&self) -> &str {
+        &self.url
+    }
+    pub const fn body(&self) -> &RequestBody {
+        &self.body
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use assert2::let_assert;
+
+    use super::*;
+
+    #[test_log::test]
+    fn test_saved_request() {
+        let request =
+            SavedRequest::new(RequestMethod::Get, "https://httpbin.org", RequestBody::None);
+        assert_eq!(request.method, RequestMethod::Get);
+        assert_eq!(request.url, "https://httpbin.org");
+        assert_eq!(request.body, RequestBody::None);
+    }
+
+    #[test_log::test]
+    fn test_saved_request_body() {
+        let request = SavedRequest::new(
+            RequestMethod::Get,
+            "https://httpbin.org",
+            RequestBody::String("body".to_string()),
+        );
+        let_assert!(RequestBody::String(body) = request.body());
+        assert_eq!(body, "body");
+    }
+
+    #[test_log::test]
+    fn test_saved_request_eq() {
+        let request1 = SavedRequest::new(
+            RequestMethod::Get,
+            "https://httpbin.org",
+            RequestBody::String("body".to_string()),
+        );
+        let request2 = SavedRequest::new(
+            RequestMethod::Get,
+            "https://httpbin.org",
+            RequestBody::String("body".to_string()),
+        );
+        assert_eq!(request1, request2);
+    }
+
+    #[test_log::test]
+    fn test_saved_request_ne_method() {
+        let request1 = SavedRequest::new(
+            RequestMethod::Get,
+            "https://httpbin.org",
+            RequestBody::String("body".to_string()),
+        );
+        let request2 = SavedRequest::new(
+            RequestMethod::Post,
+            "https://httpbin.org",
+            RequestBody::String("body".to_string()),
+        );
+        assert_ne!(request1, request2);
+    }
+
+    #[test_log::test]
+    fn test_saved_request_ne_url() {
+        let request1 = SavedRequest::new(
+            RequestMethod::Get,
+            "https://httpbin.org",
+            RequestBody::String("body".to_string()),
+        );
+        let request2 = SavedRequest::new(
+            RequestMethod::Get,
+            "https://httpbin.org2",
+            RequestBody::String("body".to_string()),
+        );
+        assert_ne!(request1, request2);
+    }
+
+    #[test_log::test]
+    fn test_saved_request_ne_body() {
+        let request1 = SavedRequest::new(
+            RequestMethod::Get,
+            "https://httpbin.org",
+            RequestBody::String("body".to_string()),
+        );
+        let request2 = SavedRequest::new(
+            RequestMethod::Get,
+            "https://httpbin.org",
+            RequestBody::String("body2".to_string()),
+        );
+        assert_ne!(request1, request2);
+    }
+}