process: Share init in tests

tests/support/mod.rs

@@ -0,0 +1,43 @@
+extern crate env_logger;
+extern crate futures;
+extern crate tokio_core;
+extern crate tokio_process;
+
+use std::env;
+use std::process::Command;
+use std::sync::{Once, ONCE_INIT};
+use std::thread;
+use std::sync::mpsc::channel;
+
+use self::tokio_core::reactor::Core;
+use self::futures::future;
+use self::tokio_process::CommandExt;
+
+pub fn init() {
+    static INIT: Once = ONCE_INIT;
+
+    INIT.call_once(|| {
+        drop(env_logger::init());
+        let (tx, rx) = channel();
+        thread::spawn(move || {
+            let mut lp = Core::new().unwrap();
+            let mut cmd = cmd("exit");
+            let mut child = cmd.spawn_async(&lp.handle()).unwrap();
+            drop(child.kill());
+            lp.run(child).unwrap();
+            tx.send(()).unwrap();
+            drop(lp.run(future::empty::<(), ()>()));
+        });
+        rx.recv().unwrap();
+    });
+}
+
+pub fn cmd(s: &str) -> Command {
+    let mut me = env::current_exe().unwrap();
+    me.pop();
+    if me.ends_with("deps") {
+        me.pop();
+    }
+    me.push(s);
+    Command::new(me)
+}