Make it possible to run gtests on iOS.

base/test/test_listener_ios.mm

Index: base/test/test_listener_ios.mm
diff --git a/base/test/test_listener_ios.mm b/base/test/test_listener_ios.mm
new file mode 100644
index 0000000000000000000000000000000000000000..12cf5bb9ebaaf3a9a5b3a7d719de431e16f3976d
--- /dev/null
+++ b/base/test/test_listener_ios.mm
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+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/test/test_listener_ios.h"
+
+#import <Foundation/Foundation.h>
+
+#include "base/mac/scoped_nsautorelease_pool.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+// The iOS watchdog timer will kill an app that doesn't spin the main event
+// loop often enough. This uses a Gtest TestEventListener to spin the current
+// loop after each test finishes. However, if any individual test takes too
+// long, it is still possible that the app will get killed.
+
+namespace {
+
+class IOSRunLoopListener : public testing::EmptyTestEventListener {
+ public:
+  virtual void OnTestEnd(const testing::TestInfo& test_info);
+};
+
+void IOSRunLoopListener::OnTestEnd(const testing::TestInfo& test_info) {
+  base::mac::ScopedNSAutoreleasePool scoped_pool;
+
+  // At the end of the test, spin the default loop for a moment.
+  NSDate* stop_date = [NSDate dateWithTimeIntervalSinceNow:0.001];
+  [[NSRunLoop currentRunLoop] runUntilDate:stop_date];
+}
+
+}  // namespace
+
+
+namespace base {
+namespace test_listener_ios {
+
+void RegisterTestEndListener() {
+  testing::TestEventListeners& listeners =
+      testing::UnitTest::GetInstance()->listeners();
+  listeners.Append(new IOSRunLoopListener);
+}
+
+}  // namespace test_listener_ios
+}  // namespace base