Add "checked" parameter to Isolate.spawnUri.

tests/isolate/checked_test.dart

+// Copyright (c) 2014, 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:isolate";
+import "dart:async";
+import "package:expect/expect.dart";
+import "package:async_helper/async_helper.dart";
+
+void main([args, message]) {

[kevmoo, 2015/06/02 17:42:55]

How will this be marked in the status file for dart2js? Expect a failure?

[Lasse Reichstein Nielsen, 2015/06/03 06:55:25]

Yes, thanks for reminding me :)

+  if (message != null) return isolateMain(message);
+
+  bool isChecked = false;
+  assert((isChecked = true));
+  if (isChecked) return;  // Skip this test in checked mode.

[kevmoo, 2015/06/02 17:42:55]

should this 'check' happen in the status file?

[Lasse Reichstein Nielsen, 2015/06/03 06:55:25]

I'd prefer to not have it at all, but that requires the VM to change its
behavior so the command line flag doesn't override the isolate parameter.
Until we agree to doing that, the test is neutered.

+
+  var responses = {};
+  var port = new RawReceivePort();
+  port.handler = (pair) {
+    responses[pair[0]] = pair[1];
+    if (responses.length == 3) {
+      port.close();
+      Expect.isTrue(responses[true], "true @ $isChecked");
+      Expect.isTrue(responses[false], "false @ $isChecked");
+      Expect.isTrue(responses[null], "null @ $isChecked");
+    }
+  };
+  test(checked) {
+    Isolate.spawnUri(Uri.parse("checked_test.dart"), [],
+                     [checked, isChecked, port.sendPort],
+                     checked: checked)
+           .catchError(print);
+  }
+  test(true);
+  test(false);
+  test(null);
+}
+
+
+void isolateMain(args) {
+  var checkedFlag = args[0];
+  var parentIsChecked = args[1];
+  var responsePort = args[2];
+  bool isChecked = false;
+  assert((isChecked = true));
+  bool expected = checkedFlag;
+  if (checkedFlag == null) expected = parentIsChecked;
+  responsePort.send([checkedFlag, expected == isChecked]);
+}