test: add first tests for pattern matching

src/main.rs

@@ -3,8 +3,10 @@ use std::path::Path;
 
 use anyhow::{Context, Result};
 use model::{Config, FoundMarkers, Line, Marker, MarkerKind};
+use patterns::{issue_pattern, marker_pattern};
 
 mod model;
+mod patterns;
 
 fn main() -> Result<()> {
     println!("Forgejo TODO Checker!");
@@ -17,10 +19,8 @@ fn main() -> Result<()> {
         ))
         .repo(std::env::var("GITHUB_REPOSITORY").context("GITHUB_REPOSITORY")?)
         .server(std::env::var("GITHUB_SERVER_URL").context("GITHUB_SERVER_URL")?)
-        .prefix_pattern(regex::Regex::new(r"(#|//)\s*(TODO|FIXME)").context("prefix regex")?)
-        .issue_pattern(
-            regex::Regex::new(r"( |)(\(|\(#)(?P<ISSUE_NUMBER>\d+)(\))").context("issue regex")?,
-        )
+        .prefix_pattern(marker_pattern()?)
+        .issue_pattern(issue_pattern()?)
         .maybe_auth_token(std::env::var("REPO_TOKEN").ok())
         .build();
 

src/patterns/mod.rs

@@ -0,0 +1,16 @@
+//
+#[cfg(test)]
+mod tests;
+
+use anyhow::{Context as _, Result};
+use regex::Regex;
+
+/// The pattern to find a TODO or FIXME comment
+pub fn marker_pattern() -> Result<Regex> {
+    regex::Regex::new(r"(#|//)\s*(TODO|FIXME)").context("prefix regex")
+}
+
+/// The pattern to find an issue number on an already found TODO or FIXME comment
+pub fn issue_pattern() -> Result<Regex> {
+    regex::Regex::new(r"( |)(\(|\(#)(?P<ISSUE_NUMBER>\d+)(\))").context("issue regex")
+}

src/patterns/tests/issue.rs

@@ -0,0 +1,33 @@
+//
+use super::*;
+
+#[test]
+fn when_issue_should_find_number() -> anyhow::Result<()> {
+    //given
+    let line = " a line with a // TODO: (#13) issue number";
+
+    //when
+    let result = issue_pattern()?.captures(line);
+
+    //then
+    assert!(result.is_some());
+    let captures = result.unwrap();
+    let issue_number = captures.name("ISSUE_NUMBER").unwrap().as_str();
+    assert_eq!(issue_number, "13");
+
+    Ok(())
+}
+
+#[test]
+fn when_no_issue_should_find_nothing() -> anyhow::Result<()> {
+    //given
+    let line = " a line with a // TODO: and no issue number";
+
+    //when
+    let result = issue_pattern()?.captures(line);
+
+    //then
+    assert!(result.is_none());
+
+    Ok(())
+}

src/patterns/tests/marker.rs

@@ -0,0 +1,70 @@
+use super::*;
+
+#[test]
+fn when_todo_find_marker() -> anyhow::Result<()> {
+    //given
+    let line = " a line // TODO: with a marker";
+
+    //when
+    let result = marker_pattern()?.find(line);
+
+    //then
+    assert!(result.is_some());
+
+    Ok(())
+}
+
+#[test]
+fn when_fixme_find_marker() -> anyhow::Result<()> {
+    //given
+    let line = " a line // FIXME: with a marker";
+
+    //when
+    let result = marker_pattern()?.find(line);
+
+    //then
+    assert!(result.is_some());
+
+    Ok(())
+}
+
+#[test]
+fn when_no_marker_find_nothing() -> anyhow::Result<()> {
+    //given
+    let line = " a line with no marker";
+
+    //when
+    let result = marker_pattern()?.find(line);
+
+    //then
+    assert!(result.is_none());
+
+    Ok(())
+}
+
+#[test]
+fn when_invalid_todo_find_nothing() -> anyhow::Result<()> {
+    //given
+    let line = " a line TODO: with no real marker";
+
+    //when
+    let result = marker_pattern()?.find(line);
+
+    //then
+    assert!(result.is_none());
+
+    Ok(())
+}
+#[test]
+fn when_invalid_fixme_find_nothing() -> anyhow::Result<()> {
+    //given
+    let line = " a line FIXME: with no real marker";
+
+    //when
+    let result = marker_pattern()?.find(line);
+
+    //then
+    assert!(result.is_none());
+
+    Ok(())
+}

src/patterns/tests/mod.rs

@@ -0,0 +1,5 @@
+//
+use super::*;
+
+mod issue;
+mod marker;