Add process_spawned_and_wait_in_different_runtime

Signed-off-by: Jiahao XU <[email protected]>

tokio/tests/process_spawned_and_wait_in_different_runtime.rs

@@ -0,0 +1,27 @@
+#![cfg(feature = "process")]
+#![warn(rust_2018_idioms)]
+// This test reveals a difference in behavior of kqueue on FreeBSD. When the
+// reader disconnects, there does not seem to be an `EVFILT_WRITE` filter that
+// is returned.
+//
+// It is expected that `EVFILT_WRITE` would be returned with either the
+// `EV_EOF` or `EV_ERROR` flag set. If either flag is set a write would be
+// attempted, but that does not seem to occur.
+#![cfg(all(unix, not(target_os = "freebsd")))]
+
+use std::process::Stdio;
+use tokio::{process::Command, runtime::Runtime};
+
+#[test]
+fn process_spawned_and_wait_in_different_runtime() {
+ let mut child = Runtime::new().unwrap().block_on(async {
+ Command::new("true")
+ .stdin(Stdio::piped())
+ .stdout(Stdio::null())
+ .spawn()
+ .unwrap()
+ });
+ Runtime::new().unwrap().block_on(async {
+ let _ = child.wait().await.unwrap();
+ });
+}