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use std::env;
use std::env::VarError;
pub fn get() -> Result<String, VarError> {
match env::var("VISUAL") {
Ok(result) => return Ok(result),
Err(VarError::NotPresent) => {},
Err(error) => return Err(error),
}
match env::var("EDITOR") {
Ok(result) => return Ok(result),
Err(VarError::NotPresent) => {},
Err(error) => return Err(error),
}
Ok("vi".to_string())
}
#[cfg(test)]
mod tests {
use std::env;
fn it_falls_back_to_vi() {
env::remove_var("VISUAL");
env::remove_var("EDITOR");
assert_eq!(super::get(), Ok("vi".to_string()));
}
fn it_returns_visual() {
env::set_var("VISUAL", "test1");
env::remove_var("EDITOR");
assert_eq!(super::get(), Ok("test1".to_string()));
}
fn it_returns_editor() {
env::remove_var("VISUAL");
env::set_var("EDITOR", "test2");
assert_eq!(super::get(), Ok("test2".to_string()));
}
fn it_returns_visual_before_editor() {
env::set_var("VISUAL", "test3");
env::set_var("EDITOR", "test4");
assert_eq!(super::get(), Ok("test3".to_string()));
}
#[test]
fn all_tests() {
it_falls_back_to_vi();
it_returns_visual();
it_returns_editor();
it_returns_visual_before_editor();
}
}