diff options
Diffstat (limited to 'library/std/tests/env.rs')
-rw-r--r-- | library/std/tests/env.rs | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/library/std/tests/env.rs b/library/std/tests/env.rs new file mode 100644 index 000000000..b095c2dde --- /dev/null +++ b/library/std/tests/env.rs @@ -0,0 +1,140 @@ +use std::env::*; +use std::ffi::{OsStr, OsString}; + +use rand::distributions::Alphanumeric; +use rand::{thread_rng, Rng}; + +fn make_rand_name() -> OsString { + let rng = thread_rng(); + let n = format!("TEST{}", rng.sample_iter(&Alphanumeric).take(10).collect::<String>()); + let n = OsString::from(n); + assert!(var_os(&n).is_none()); + n +} + +fn eq(a: Option<OsString>, b: Option<&str>) { + assert_eq!(a.as_ref().map(|s| &**s), b.map(OsStr::new).map(|s| &*s)); +} + +#[test] +fn test_set_var() { + let n = make_rand_name(); + set_var(&n, "VALUE"); + eq(var_os(&n), Some("VALUE")); +} + +#[test] +fn test_remove_var() { + let n = make_rand_name(); + set_var(&n, "VALUE"); + remove_var(&n); + eq(var_os(&n), None); +} + +#[test] +fn test_set_var_overwrite() { + let n = make_rand_name(); + set_var(&n, "1"); + set_var(&n, "2"); + eq(var_os(&n), Some("2")); + set_var(&n, ""); + eq(var_os(&n), Some("")); +} + +#[test] +#[cfg_attr(target_os = "emscripten", ignore)] +fn test_var_big() { + let mut s = "".to_string(); + let mut i = 0; + while i < 100 { + s.push_str("aaaaaaaaaa"); + i += 1; + } + let n = make_rand_name(); + set_var(&n, &s); + eq(var_os(&n), Some(&s)); +} + +#[test] +#[cfg_attr(target_os = "emscripten", ignore)] +fn test_env_set_get_huge() { + let n = make_rand_name(); + let s = "x".repeat(10000); + set_var(&n, &s); + eq(var_os(&n), Some(&s)); + remove_var(&n); + eq(var_os(&n), None); +} + +#[test] +fn test_env_set_var() { + let n = make_rand_name(); + + let mut e = vars_os(); + set_var(&n, "VALUE"); + assert!(!e.any(|(k, v)| { &*k == &*n && &*v == "VALUE" })); + + assert!(vars_os().any(|(k, v)| { &*k == &*n && &*v == "VALUE" })); +} + +#[test] +#[cfg_attr(not(any(unix, windows)), ignore, allow(unused))] +#[allow(deprecated)] +fn env_home_dir() { + use std::path::PathBuf; + + fn var_to_os_string(var: Result<String, VarError>) -> Option<OsString> { + match var { + Ok(var) => Some(OsString::from(var)), + Err(VarError::NotUnicode(var)) => Some(var), + _ => None, + } + } + + cfg_if::cfg_if! { + if #[cfg(unix)] { + let oldhome = var_to_os_string(var("HOME")); + + set_var("HOME", "/home/MountainView"); + assert_eq!(home_dir(), Some(PathBuf::from("/home/MountainView"))); + + remove_var("HOME"); + if cfg!(target_os = "android") { + assert!(home_dir().is_none()); + } else { + // When HOME is not set, some platforms return `None`, + // but others return `Some` with a default. + // Just check that it is not "/home/MountainView". + assert_ne!(home_dir(), Some(PathBuf::from("/home/MountainView"))); + } + + if let Some(oldhome) = oldhome { set_var("HOME", oldhome); } + } else if #[cfg(windows)] { + let oldhome = var_to_os_string(var("HOME")); + let olduserprofile = var_to_os_string(var("USERPROFILE")); + + remove_var("HOME"); + remove_var("USERPROFILE"); + + assert!(home_dir().is_some()); + + set_var("HOME", "/home/MountainView"); + assert_eq!(home_dir(), Some(PathBuf::from("/home/MountainView"))); + + remove_var("HOME"); + + set_var("USERPROFILE", "/home/MountainView"); + assert_eq!(home_dir(), Some(PathBuf::from("/home/MountainView"))); + + set_var("HOME", "/home/MountainView"); + set_var("USERPROFILE", "/home/PaloAlto"); + assert_eq!(home_dir(), Some(PathBuf::from("/home/MountainView"))); + + remove_var("HOME"); + remove_var("USERPROFILE"); + + if let Some(oldhome) = oldhome { set_var("HOME", oldhome); } + if let Some(olduserprofile) = olduserprofile { set_var("USERPROFILE", olduserprofile); } + } + } +} |