Add signal test for each supported signal.

tests/standalone/io/signals_test.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 import "dart:io";
+import "dart:convert";
 
 import "package:expect/expect.dart";
 import "package:async_helper/async_helper.dart";
 
 void testSignals(int usr1Expect,
                  int usr2Expect,
                  [int usr1Send,
                   int usr2Send,
                   bool shouldFail = false]) {
   if (usr1Send == null) usr1Send = usr1Expect;
@@ skipping 19 matching lines @@
           v++;
         }
       });
       process.exitCode.then((exitCode) {
         Expect.equals(shouldFail, exitCode != 0);
         asyncEnd();
       });
     });
 }
 
+void testSignal(ProcessSignal signal) {
+  asyncStart();
+  Process.start(Platform.executable,
+      [Platform.script.resolve('signal_test_script.dart').toFilePath(),
+       signal.toString()])
+    .then((process) {
+      process.stdin.close();
+      process.stderr.transform(UTF8.decoder).listen(print);

[Søren Gjesse, 2014/02/13 10:54:27]

Debug print?

[Anders Johnsen, 2014/02/13 12:08:03]

Done.

+
+      var output = "";
+      process.stdout.transform(UTF8.decoder)
+        .listen((str) {
+          output += str;
+          if (output == 'ready\n') {
+            process.kill(signal);
+          }
+        }, onDone: () {
+          Expect.equals('ready\ngot signal\n', output);
+        });
+      process.exitCode.then((exitCode) {
+        Expect.equals(0, exitCode);
+        asyncEnd();
+      });
+    });
+}
+
 
 void testListenCancel() {
   for (int i = 0; i < 10; i++) {
     ProcessSignal.SIGINT.watch().listen(null).cancel();
   }
 }
 
 void main() {
   testListenCancel();
   if (Platform.isWindows) return;
   testSignals(0, 0);
   testSignals(1, 0);
   testSignals(0, 1);
   testSignals(1, 1);
   testSignals(10, 10);
   testSignals(10, 1);
   testSignals(1, 10);
   testSignals(1, 0, 0, 1, true);
   testSignals(0, 1, 1, 0, true);
+

[Søren Gjesse, 2014/02/13 10:54:27]

Don't you need to skip some of these on Windows?

[Anders Johnsen, 2014/02/13 12:08:03]

Already filtered out, see 10 lines above.

+  testSignal(ProcessSignal.SIGHUP);
+  testSignal(ProcessSignal.SIGINT);
+  testSignal(ProcessSignal.SIGTERM);
+  testSignal(ProcessSignal.SIGUSR1);
+  testSignal(ProcessSignal.SIGUSR2);
+  testSignal(ProcessSignal.SIGWINCH);
 }