| use std::env::*; |
| use std::ffi::{OsString, OsStr}; |
| |
| use rand::{thread_rng, Rng}; |
| use rand::distributions::Alphanumeric; |
| |
| fn make_rand_name() -> OsString { |
| let mut 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" |
| })); |
| } |