default_editor/
lib.rs

1use std::env;
2use std::env::VarError;
3
4/// Get the default editor for the current environment
5pub fn get() -> Result<String, VarError> {
6    match env::var("VISUAL") {
7        Ok(result) => return Ok(result),
8        Err(VarError::NotPresent) => {},
9        Err(error) => return Err(error),
10    }
11
12    match env::var("EDITOR") {
13        Ok(result) => return Ok(result),
14        Err(VarError::NotPresent) => {},
15        Err(error) => return Err(error),
16    }
17
18    Ok("vi".to_string())
19}
20
21#[cfg(test)]
22mod tests {
23    use std::env;
24
25    fn it_falls_back_to_vi() {
26        env::remove_var("VISUAL");
27        env::remove_var("EDITOR");
28
29        assert_eq!(super::get(), Ok("vi".to_string()));
30    }
31
32    fn it_returns_visual() {
33        env::set_var("VISUAL", "test1");
34        env::remove_var("EDITOR");
35
36        assert_eq!(super::get(), Ok("test1".to_string()));
37    }
38
39    fn it_returns_editor() {
40        env::remove_var("VISUAL");
41        env::set_var("EDITOR", "test2");
42
43        assert_eq!(super::get(), Ok("test2".to_string()));
44    }
45
46    fn it_returns_visual_before_editor() {
47        env::set_var("VISUAL", "test3");
48        env::set_var("EDITOR", "test4");
49
50        assert_eq!(super::get(), Ok("test3".to_string()));
51    }
52
53    #[test]
54    fn all_tests() {
55        // Wrap all tests in another function since they cannot be run in parallel
56
57        it_falls_back_to_vi();
58        it_returns_visual();
59        it_returns_editor();
60        it_returns_visual_before_editor();
61    }
62}
default_editor/lib.rs

default_editor/
lib.rs
