From 9b6470bf0600b14fce30a769fd373aa29e79b525 Mon Sep 17 00:00:00 2001
From: Paul Campbell <pcampbell@kemitix.net>
Date: Wed, 22 Mar 2023 06:59:25 +0000
Subject: [PATCH] skip until matching tokens seen

---
 src/lib.rs      | 102 +++++++++++++++++++++++++++++++++++++++++++++---
 tests/lorem.txt |   8 ++++
 tests/poem.txt  |   7 ++++
 3 files changed, 112 insertions(+), 5 deletions(-)
 create mode 100644 tests/lorem.txt
 create mode 100644 tests/poem.txt

diff --git a/src/lib.rs b/src/lib.rs
index c9f12be..20ca087 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -27,7 +27,7 @@ pub struct Cli {
     ignore_extras: bool,
 }
 
-pub fn skip<F>(cli: &Cli, mut out: F) -> io::Result<()>
+pub fn skip<F>(cli: &Cli, out: F) -> io::Result<()>
 where
     F: FnMut(String) -> (),
 {
@@ -49,7 +49,6 @@ fn skip_file_lines<F>(cli: &Cli, mut out: F, file: &PathBuf) -> io::Result<()>
 where
     F: FnMut(String) -> (),
 {
-    eprintln!("skip_file_lines");
     let content = fs::read_to_string(file).expect("Could not read file");
     let mut counter = 0usize;
     for current_line in content.lines() {
@@ -65,7 +64,6 @@ fn skip_file_lines_matching<F>(cli: &Cli, mut out: F, file: &PathBuf, line: &str
 where
     F: FnMut(String) -> (),
 {
-    eprintln!("skip_file_lines_matching");
     let content = fs::read_to_string(file).expect("Could not read file");
     let mut counter = 0usize;
     for current_line in content.lines() {
@@ -83,7 +81,6 @@ fn skip_file_tokens<F>(cli: &Cli, mut out: F, file: &PathBuf, token: &str) -> io
 where
     F: FnMut(String) -> (),
 {
-    eprintln!("skip_file_lines_tokens");
     let content = fs::read_to_string(file).expect("Could not read file");
     let mut counter = 0usize;
     for current_line in content.lines() {
@@ -91,7 +88,12 @@ where
             out(String::from(current_line));
         }
         if current_line.contains(&token) {
-            counter += 1;
+            if cli.ignore_extras {
+                counter += 1;
+            } else {
+                let occurances = current_line.matches(&token).count();
+                counter += occurances;
+            }
         }
     }
     Ok(())
@@ -162,4 +164,94 @@ mod tests {
         Ok(())
     }
 
+    #[test]
+    fn skip_three_matching_tokens() -> io::Result<()> {
+        //given
+        let cli = Cli {
+            lines: 3,
+            file: Some(PathBuf::from("tests/poem.txt")),
+            line: None,
+            token: Some(String::from("one")),
+            ignore_extras: false,
+        };
+        let mut lines: Vec<String> = Vec::new();
+
+        //when
+        skip(&cli, |line| lines.push(line))?;
+
+        //then
+        assert_eq!(
+            lines,
+            vec![
+                "Or help one fainting robin",
+                "Unto his nest again,",
+                "I shall not live in vain."
+            ]
+        );
+        Ok(())
+    }
+
+    #[test]
+    fn skip_three_matching_tokens_include_extras() -> io::Result<()> {
+        //given
+        let cli = Cli {
+            lines: 4,
+            file: Some(PathBuf::from("tests/lorem.txt")),
+            line: None,
+            token: Some(String::from("or")),
+            ignore_extras: false,
+        };
+        let mut lines: Vec<String> = Vec::new();
+
+        //when
+        skip(&cli, |line| lines.push(line))?;
+
+        //then
+        assert_eq!(
+            lines,
+            vec![
+                //Lorem ipsum dolor sit amet,        -- +2 = 2
+                //consectetur adipiscing elit,
+                //sed do eiusmod tempor incididunt   -- +1 = 3
+                //ut labore et dolore magna aliqua.  -- +2 = 5
+                "Ut enim ad minim veniam,",
+                "quis nostrud exercitation ullamco",
+                "laboris nisi ut aliquip ex ea",
+                "commodo consequat."
+            ]
+        );
+        Ok(())
+    }
+
+    #[test]
+    fn skip_three_matching_tokens_ignore_extras() -> io::Result<()> {
+        //given
+        let cli = Cli {
+            lines: 4,
+            file: Some(PathBuf::from("tests/lorem.txt")),
+            line: None,
+            token: Some(String::from("or")),
+            ignore_extras: true,
+        };
+        let mut lines: Vec<String> = Vec::new();
+
+        //when
+        skip(&cli, |line| lines.push(line))?;
+
+        //then
+        assert_eq!(
+            lines,
+            vec![
+                //Lorem ipsum dolor sit amet,        -- 1
+                //consectetur adipiscing elit,
+                //sed do eiusmod tempor incididunt   -- 2
+                //ut labore et dolore magna aliqua.  -- 3
+                //Ut enim ad minim veniam,
+                //quis nostrud exercitation ullamco
+                //laboris nisi ut aliquip ex ea      -- 4
+                "commodo consequat."
+            ]
+        );
+        Ok(())
+    }
 }
diff --git a/tests/lorem.txt b/tests/lorem.txt
new file mode 100644
index 0000000..61f2dc3
--- /dev/null
+++ b/tests/lorem.txt
@@ -0,0 +1,8 @@
+Lorem ipsum dolor sit amet,
+consectetur adipiscing elit,
+sed do eiusmod tempor incididunt
+ut labore et dolore magna aliqua.
+Ut enim ad minim veniam,
+quis nostrud exercitation ullamco
+laboris nisi ut aliquip ex ea
+commodo consequat.
diff --git a/tests/poem.txt b/tests/poem.txt
new file mode 100644
index 0000000..5203679
--- /dev/null
+++ b/tests/poem.txt
@@ -0,0 +1,7 @@
+If I can stop one heart from breaking,
+I shall not live in vain;
+If I can ease one life the aching,
+Or cool one pain,
+Or help one fainting robin
+Unto his nest again,
+I shall not live in vain.