overscroll: Add a browser-test for the aura implementation.

content/browser/web_contents/web_contents_view_aura_browsertest.cc

+// 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 "content/browser/web_contents/web_contents_view_aura.h"
+
+#include "base/command_line.h"
+#include "base/run_loop.h"
+#include "base/test/test_timeouts.h"
+#include "base/utf_string_conversions.h"
+#include "content/browser/renderer_host/render_view_host_impl.h"
+#include "content/browser/web_contents/web_contents_impl.h"
+#include "content/public/common/content_switches.h"
+#include "content/public/test/browser_test_utils.h"
+#include "content/public/test/test_utils.h"
+#include "content/shell/shell.h"
+#include "content/test/content_browser_test.h"
+#include "content/test/content_browser_test_utils.h"
+#include "ui/aura/root_window.h"
+#include "ui/aura/test/event_generator.h"
+#include "ui/aura/window.h"
+
+namespace content {
+
+class WebContentsViewAuraTest : public ContentBrowserTest {
+ public:
+  WebContentsViewAuraTest() {}
+
+  virtual void SetUpCommandLine(CommandLine* command_line) {
+    command_line->AppendSwitch(switches::kEnableOverscrollHistoryNavigation);
+  }
+
+  // Executes the javascript synchronously and makes sure the returned value is
+  // freed properly.
+  void ExecuteSyncJSFunction(RenderViewHost* rvh, const std::string& jscript) {
+    scoped_ptr<base::Value> value(rvh->ExecuteJavascriptAndGetValue(
+        string16(), ASCIIToUTF16(jscript)));
+  }
+
+  // Starts the test server and navigates to the given url. Sets a large enough
+  // size to the root window.  Returns after the navigation to the url is
+  // complete.
+  void StartTestWithPage(const std::string& url) {
+    ASSERT_TRUE(test_server()->Start());
+    GURL test_url(test_server()->GetURL(url));
+    NavigateToURL(shell(), test_url);
+    aura::Window* content = shell()->web_contents()->GetContentNativeView();
+    content->GetRootWindow()->SetHostSize(gfx::Size(800, 600));
+  }
+
+  void TestOverscrollNavigation(bool touch_handler) {
+    StartTestWithPage("files/overscroll_navigation.html");

[sky, 2012/11/19 17:14:35]

Sine StartTestWithPage may assert you need to wrap this in
ASSERT_NO_FATAL_FAILURE

[sadrul, 2012/11/19 17:22:00]

Nice! Didn't know about this. Thanks!

+    WebContentsImpl* web_contents =
+        static_cast<WebContentsImpl*>(shell()->web_contents());
+    NavigationController& controller = web_contents->GetController();
+    RenderViewHostImpl* view_host = static_cast<RenderViewHostImpl*>(
+        web_contents->GetRenderViewHost());
+
+    EXPECT_FALSE(controller.CanGoBack());
+    EXPECT_FALSE(controller.CanGoForward());
+    int index = -1;
+    scoped_ptr<base::Value> value;
+    value.reset(view_host->ExecuteJavascriptAndGetValue(string16(),
+        ASCIIToUTF16("get_current()")));
+    ASSERT_TRUE(value->GetAsInteger(&index));
+    EXPECT_EQ(0, index);
+
+    if (touch_handler)
+      ExecuteSyncJSFunction(view_host, "install_touch_handler()");
+
+    ExecuteSyncJSFunction(view_host, "navigate_next()");
+    ExecuteSyncJSFunction(view_host, "navigate_next()");
+    value.reset(view_host->ExecuteJavascriptAndGetValue(string16(),
+        ASCIIToUTF16("get_current()")));
+    ASSERT_TRUE(value->GetAsInteger(&index));
+    EXPECT_EQ(2, index);
+    EXPECT_TRUE(controller.CanGoBack());
+    EXPECT_FALSE(controller.CanGoForward());
+
+    aura::Window* content = web_contents->GetContentNativeView();
+    gfx::Rect bounds = content->GetBoundsInRootWindow();
+    aura::test::EventGenerator generator(content->GetRootWindow(), content);
+
+    {
+      // Do a swipe-right now. That should navigate backwards.
+      string16 expected_title = ASCIIToUTF16("Title: #1");
+      content::TitleWatcher title_watcher(web_contents, expected_title);
+      generator.GestureScrollSequence(
+          gfx::Point(bounds.x() + 2, bounds.y() + 10),
+          gfx::Point(bounds.right() - 10, bounds.y() + 10),
+          base::TimeDelta::FromMilliseconds(20),
+          1);
+      string16 actual_title = title_watcher.WaitAndGetTitle();
+      EXPECT_EQ(expected_title, actual_title);
+      value.reset(view_host->ExecuteJavascriptAndGetValue(string16(),
+            ASCIIToUTF16("get_current()")));
+      ASSERT_TRUE(value->GetAsInteger(&index));
+      EXPECT_EQ(1, index);
+      EXPECT_TRUE(controller.CanGoBack());
+      EXPECT_TRUE(controller.CanGoForward());
+    }
+
+    {
+      // Do a fling-right now. That should navigate backwards.
+      string16 expected_title = ASCIIToUTF16("Title:");
+      content::TitleWatcher title_watcher(web_contents, expected_title);
+      generator.GestureScrollSequence(
+          gfx::Point(bounds.x() + 2, bounds.y() + 10),
+          gfx::Point(bounds.right() - 10, bounds.y() + 10),
+          base::TimeDelta::FromMilliseconds(20),
+          10);
+      string16 actual_title = title_watcher.WaitAndGetTitle();
+      EXPECT_EQ(expected_title, actual_title);
+      value.reset(view_host->ExecuteJavascriptAndGetValue(string16(),
+            ASCIIToUTF16("get_current()")));
+      ASSERT_TRUE(value->GetAsInteger(&index));
+      EXPECT_EQ(0, index);
+      EXPECT_FALSE(controller.CanGoBack());
+      EXPECT_TRUE(controller.CanGoForward());
+    }
+
+    {
+      // Do a swipe-left now. That should navigate forward.
+      string16 expected_title = ASCIIToUTF16("Title: #1");
+      content::TitleWatcher title_watcher(web_contents, expected_title);
+      generator.GestureScrollSequence(
+          gfx::Point(bounds.right() - 10, bounds.y() + 10),
+          gfx::Point(bounds.x() + 2, bounds.y() + 10),
+          base::TimeDelta::FromMilliseconds(20),
+          10);
+      string16 actual_title = title_watcher.WaitAndGetTitle();
+      EXPECT_EQ(expected_title, actual_title);
+      value.reset(view_host->ExecuteJavascriptAndGetValue(string16(),
+            ASCIIToUTF16("get_current()")));
+      ASSERT_TRUE(value->GetAsInteger(&index));
+      EXPECT_EQ(1, index);
+      EXPECT_TRUE(controller.CanGoBack());
+      EXPECT_TRUE(controller.CanGoForward());
+    }
+  }
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(WebContentsViewAuraTest);
+};
+
+IN_PROC_BROWSER_TEST_F(WebContentsViewAuraTest,
+                       OverscrollNavigation) {
+  TestOverscrollNavigation(false);
+}
+
+IN_PROC_BROWSER_TEST_F(WebContentsViewAuraTest,
+                       OverscrollNavigationWithTouchHandler) {
+  TestOverscrollNavigation(true);
+}
+
+}  // namespace content