Move global vars changing tests into run-pass

Should fix race #42795

src/libstd/env.rs

@@ -949,63 +949,9 @@ mod arch {
 mod tests {
     use super::*;
 
-    use iter::repeat;
-    use rand::{self, Rng};
-    use ffi::{OsString, OsStr};
+    use ffi::OsStr;
     use path::{Path, PathBuf};
 
-    fn make_rand_name() -> OsString {
-        let mut rng = rand::thread_rng();
-        let n = format!("TEST{}", rng.gen_ascii_chars().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_self_exe_path() {
@@ -1017,32 +963,6 @@ mod tests {
         assert!(path.is_absolute());
     }
 
-    #[test]
-    #[cfg_attr(target_os = "emscripten", ignore)]
-    fn test_env_set_get_huge() {
-        let n = make_rand_name();
-        let s = repeat("x").take(10000).collect::<String>();
-        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]
     fn test() {
         assert!((!Path::new("test-path").is_absolute()));

src/test/run-pass/env.rs

@@ -0,0 +1,98 @@
+// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// compile-flags: --test
+
+#![feature(rand, std_panic)]
+
+use std::env::*;
+use std::__rand as rand;
+use std::__rand::Rng;
+use std::iter::repeat;
+use std::ffi::{OsString, OsStr};
+
+
+fn make_rand_name() -> OsString {
+    let mut rng = rand::thread_rng();
+    let n = format!("TEST{}", rng.gen_ascii_chars().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 = repeat("x").take(10000).collect::<String>();
+    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"
+    }));
+}