Fix a race condition between remove_from_env and other io::process tests.

Author: eddyb

src/libstd/io/process.rs

@@ -1024,32 +1024,6 @@ mod tests {
                 "didn't find RUN_TEST_NEW_ENV inside of:\n\n{}", output);
     }
 
-    #[test]
-    fn test_remove_from_env() {
-        use os;
-
-        // save original environment
-        let old_env = os::getenv("RUN_TEST_NEW_ENV");
-
-        os::setenv("RUN_TEST_NEW_ENV", "123");
-        let prog = env_cmd().env_remove("RUN_TEST_NEW_ENV").spawn().unwrap();
-        let result = prog.wait_with_output().unwrap();
-        let output = str::from_utf8_lossy(result.output.as_slice()).into_string();
-
-        // restore original environment
-        match old_env {
-            None => {
-                os::unsetenv("RUN_TEST_NEW_ENV");
-            }
-            Some(val) => {
-                os::setenv("RUN_TEST_NEW_ENV", val.as_slice());
-            }
-        }
-
-        assert!(!output.as_slice().contains("RUN_TEST_NEW_ENV"),
-                "found RUN_TEST_NEW_ENV inside of:\n\n{}", output);
-    }
-
     #[cfg(unix)]
     pub fn sleeper() -> Process {
         Command::new("sleep").arg("1000").spawn().unwrap()

src/test/run-pass/process-remove-from-env.rs

@@ -0,0 +1,53 @@
+// Copyright 2014 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.
+
+use std::io::Command;
+use std::os;
+
+#[cfg(all(unix, not(target_os="android")))]
+pub fn env_cmd() -> Command {
+    Command::new("env")
+}
+#[cfg(target_os="android")]
+pub fn env_cmd() -> Command {
+    let mut cmd = Command::new("/system/bin/sh");
+    cmd.arg("-c").arg("set");
+    cmd
+}
+
+#[cfg(windows)]
+pub fn env_cmd() -> Command {
+    let mut cmd = Command::new("cmd");
+    cmd.arg("/c").arg("set");
+    cmd
+}
+
+fn main() {
+    // save original environment
+    let old_env = os::getenv("RUN_TEST_NEW_ENV");
+
+    os::setenv("RUN_TEST_NEW_ENV", "123");
+
+    let mut cmd = env_cmd();
+    cmd.env_remove("RUN_TEST_NEW_ENV");
+
+    // restore original environment
+    match old_env {
+        None => os::unsetenv("RUN_TEST_NEW_ENV"),
+        Some(val) => os::setenv("RUN_TEST_NEW_ENV", val.as_slice())
+    }
+
+    let prog = cmd.spawn().unwrap();
+    let result = prog.wait_with_output().unwrap();
+    let output = String::from_utf8_lossy(result.output.as_slice());
+
+    assert!(!output.as_slice().contains("RUN_TEST_NEW_ENV"),
+            "found RUN_TEST_NEW_ENV inside of:\n\n{}", output);
+}