Implement stub of Blink API to check for enabled experiments

third_party/WebKit/Source/core/experiments/ExperimentsTest.cpp

+// Copyright 2015 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 "config.h"
+#include "core/experiments/Experiments.h"
+
+#include "core/dom/DOMException.h"
+#include "core/dom/ExceptionCode.h"
+#include <gtest/gtest.h>
+
+namespace blink {
+namespace {
+
+const char* kNonExistingAPIName = "This API does not exist";
+
+TEST(ExperimentsTest, EnabledNonExistingAPI)
+{
+    bool isNonExistingApiEnabled = Experiments::isApiEnabled(nullptr, kNonExistingAPIName);
+    EXPECT_FALSE(isNonExistingApiEnabled);
+}
+
+TEST(ExperimentsTest, DisabledException)
+{
+    DOMException* disabledException = Experiments::createApiDisabledException(kNonExistingAPIName);
+    ASSERT_TRUE(disabledException) << "An exception should have been created";
+    EXPECT_EQ(DOMException::getErrorName(NotSupportedError), disabledException->name());
+    EXPECT_TRUE(disabledException->message().contains(kNonExistingAPIName)) << "Message should contain the API name, was: " << disabledException->message();
+}
+
+} // namespace
+} // namespace blink