1 files changed, 54 insertions, 0 deletions
diff --git a/tests/ui/process/process-envs.rs b/tests/ui/process/process-envs.rs
new file mode 100644
index 000000000..f3a469791
--- /dev/null
+++ b/tests/ui/process/process-envs.rs
@@ -0,0 +1,54 @@
+// run-pass
+// ignore-emscripten no processes
+// ignore-sgx no processes
+// ignore-vxworks no 'env'
+// ignore-fuchsia no 'env'
+
+use std::process::Command;
+use std::env;
+use std::collections::HashMap;
+
+#[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 = env::var_os("RUN_TEST_NEW_ENV");
+
+    env::set_var("RUN_TEST_NEW_ENV", "123");
+
+    // create filtered environment vector
+    let filtered_env : HashMap<String, String> =
+        env::vars().filter(|&(ref k, _)| k == "PATH").collect();
+
+    let mut cmd = env_cmd();
+    cmd.env_clear();
+    cmd.envs(&filtered_env);
+
+    // restore original environment
+    match old_env {
+        None => env::remove_var("RUN_TEST_NEW_ENV"),
+        Some(val) => env::set_var("RUN_TEST_NEW_ENV", &val)
+    }
+
+    let result = cmd.output().unwrap();
+    let output = String::from_utf8_lossy(&result.stdout);
+
+    assert!(!output.contains("RUN_TEST_NEW_ENV"),
+            "found RUN_TEST_NEW_ENV inside of:\n\n{}", output);
+}