Allow overriding WebUIFactory when test flag is set.

chrome/browser/ui/webui/test_chrome_web_ui_factory_browsertest.cc

+// Copyright (c) 2011 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 "chrome/browser/ui/webui/test_chrome_web_ui_factory.h"
+#include "chrome/test/in_process_browser_test.h"
+#include "chrome/test/ui_test_utils.h"
+#include "googleurl/src/gurl.h"
+#include "testing/gmock/include/gmock/gmock.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+using ::testing::_;
+using ::testing::Eq;
+using ::testing::StrictMock;
+
+namespace {
+
+// Returns a new WebUI object for the TabContents from |arg0|.
+ACTION(ReturnNewWebUI) {
+  return new WebUI(arg0);
+}
+
+// Mock the TestChromeWebUIFactory::WebUIProvider to prove that we are called as
+// expected.
+class MockWebUIProvider : public TestChromeWebUIFactory::WebUIProvider {
+ public:
+  MOCK_METHOD2(NewWebUI, WebUI*(TabContents* tab_contents, const GURL& url));
+};
+
+// Dummy URL location for us to override.
+const char kChromeTestChromeWebUIFactory[] =
+    "chrome://ChromeTestChromeWebUIFactory/";
+
+// Sets up and tears down the factory override for our url's host. It is
+// necessary to do this here, rather than in the test declaration, which is too
+// late to catch the possibility of an initial browse to about:blank mistakenly
+// going to this handler.
+class TestChromeWebUIFactoryTest : public InProcessBrowserTest {
+ public:
+  virtual void SetUpInProcessBrowserTestFixture() OVERRIDE {
+    InProcessBrowserTest::SetUpInProcessBrowserTestFixture();
+    TestChromeWebUIFactory::AddFactoryOverride(
+        GURL(kChromeTestChromeWebUIFactory).host(), &mock_provider_);
+  }
+
+  virtual void TearDownInProcessBrowserTestFixture() OVERRIDE {
+    TestChromeWebUIFactory::RemoveFactoryOverride(
+        GURL(kChromeTestChromeWebUIFactory).host());
+  }
+
+ protected:
+  StrictMock<MockWebUIProvider> mock_provider_;
+};
+
+}  // namespace
+
+// Test that browsing to our test url causes us to be called once.
+IN_PROC_BROWSER_TEST_F(TestChromeWebUIFactoryTest, TestWebUIProvider) {
+  const GURL kChromeTestChromeWebUIFactoryURL(kChromeTestChromeWebUIFactory);
+  EXPECT_CALL(mock_provider_, NewWebUI(_, Eq(kChromeTestChromeWebUIFactoryURL)))
+      .WillOnce(ReturnNewWebUI());
+  ui_test_utils::NavigateToURL(browser(), kChromeTestChromeWebUIFactoryURL);
+}