Support an @OnPlatform annotation.

test/runner/browser/runner_test.dart

Index: test/runner/browser/runner_test.dart
diff --git a/test/runner/browser/runner_test.dart b/test/runner/browser/runner_test.dart
index 146c05fd5c7ab90e6d7c54456f4c67944038c112..d4173215416cc380d6ba44c02390d330933190f3 100644
--- a/test/runner/browser/runner_test.dart
+++ b/test/runner/browser/runner_test.dart
@@ -514,7 +514,7 @@ void main() {
     expect(result.stdout, contains("-1: Some tests failed."));
   });
 
-  group("in onPlatform", () {
+  group("with onPlatform", () {
     test("respects matching Skips", () {
       new File(p.join(_sandbox, "test.dart")).writeAsStringSync('''
 import 'dart:async';
@@ -607,6 +607,81 @@ void main() {
       ])));
     });
   });
+
+  group("with an @OnPlatform annotation", () {
+    test("respects matching Skips", () {
+      new File(p.join(_sandbox, "test.dart")).writeAsStringSync('''
+@OnPlatform(const {"chrome": const Skip()})
+
+import 'dart:async';
+
+import 'package:test/test.dart';
+
+void main() {
+  test("fail", () => throw 'oh no');
+}
+''');
+
+      var result = _runUnittest(["-p", "chrome", "test.dart"]);
+      expect(result.stdout, contains("+0 ~1: All tests skipped."));
+    });
+
+    test("ignores non-matching Skips", () {
+      new File(p.join(_sandbox, "test.dart")).writeAsStringSync('''
+@OnPlatform(const {"vm": const Skip()})
+
+import 'dart:async';
+
+import 'package:test/test.dart';
+
+void main() {
+  test("success", () {});
+}
+''');
+
+      var result = _runUnittest(["-p", "chrome", "test.dart"]);
+      expect(result.stdout, contains("+1: All tests passed!"));
+    });
+
+    test("respects matching Timeouts", () {
+      new File(p.join(_sandbox, "test.dart")).writeAsStringSync('''
+@OnPlatform(const {
+  "chrome": const Timeout(const Duration(seconds: 0))
+})
+
+import 'dart:async';
+
+import 'package:test/test.dart';
+
+void main() {
+  test("fail", () => throw 'oh no');
+}
+''');
+
+      var result = _runUnittest(["-p", "chrome", "test.dart"]);
+      expect(result.stdout, contains("Test timed out after 0 seconds."));
+      expect(result.stdout, contains("-1: Some tests failed."));
+    });
+
+    test("ignores non-matching Timeouts", () {
+      new File(p.join(_sandbox, "test.dart")).writeAsStringSync('''
+@OnPlatform(const {
+  "vm": const Timeout(const Duration(seconds: 0))
+})
+
+import 'dart:async';
+
+import 'package:test/test.dart';
+
+void main() {
+  test("success", () {});
+}
+''');
+
+      var result = _runUnittest(["-p", "chrome", "test.dart"]);
+      expect(result.stdout, contains("+1: All tests passed!"));
+    });
+  });
 }
 
 ProcessResult _runUnittest(List<String> args) =>