mod apply_environment {    use std::{borrow::Cow, path::Path};     use git_prompt::{Mode, Options};    use git_testtools::Env;    use serial_test::serial;     #[test]    #[serial]    fn git_askpass_overrides_everything_and_ssh_askpass_does_not() {        let _env = Env::new()            .set("GIT_ASKPASS", "override")            .set("SSH_ASKPASS", "does not matter");         assert_eq!(            Options {                askpass: Some(Cow::Borrowed(Path::new("current"))),                ..Default::default()            }            .apply_environment(true, true, false)            .askpass            .expect("set")            .as_ref(),            Path::new("override")        );    }     #[test]    #[serial]    fn git_askpass_is_used_first_and_sets_unset_askpass_values() {        let _env = Env::new()            .set("GIT_ASKPASS", "from-env")            .set("SSH_ASKPASS", "does not matter");         assert_eq!(            Options::default()                .apply_environment(true, true, false)                .askpass                .expect("set")                .as_ref(),            Path::new("from-env")        );    }     #[test]    #[serial]    fn ssh_askpass_is_used_as_fallback() {        let _env = Env::new().set("SSH_ASKPASS", "fallback");         assert_eq!(            Options {                mode: Mode::Visible,                ..Default::default()            }            .apply_environment(true, true, false)            .askpass            .expect("set")            .as_ref(),            Path::new("fallback")        );    }     #[test]    #[serial]    fn ssh_askpass_does_not_override_current_value() {        let _env = Env::new().set("SSH_ASKPASS", "fallback");         assert_eq!(            Options {                askpass: Some(Cow::Borrowed(Path::new("current"))),                ..Default::default()            }            .apply_environment(true, true, false)            .askpass            .expect("set")            .as_ref(),            Path::new("current")        );    }     #[test]    #[serial]    fn mode_is_left_untouched_if_terminal_prompt_is_trueish() {        let _env = Env::new().set("GIT_TERMINAL_PROMPT", "true");         assert_eq!(            Options {                mode: Mode::Hidden,                ..Default::default()            }            .apply_environment(false, false, true)            .mode,            Mode::Hidden        );    }     #[test]    #[serial]    fn mode_is_disabled_if_terminal_prompt_is_falseish() {        let _env = Env::new().set("GIT_TERMINAL_PROMPT", "0");         assert_eq!(            Options {                mode: Mode::Hidden,                ..Default::default()            }            .apply_environment(false, false, true)            .mode,            Mode::Disable        );    }     #[test]    #[serial]    fn mode_is_unchanged_if_git_terminal_prompt_is_not_set() {        assert_eq!(            Options {                mode: Mode::Hidden,                ..Default::default()            }            .apply_environment(false, false, true)            .mode,            Mode::Hidden        );    }}