[test fixlet] Add tests for the zoom icon in the location bar on GTK.

chrome/browser/ui/gtk/zoom_bubble_gtk_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 <gtk/gtk.h>
+
+#include "base/string_number_conversions.h"
+#include "chrome/browser/ui/browser.h"
+#include "chrome/browser/ui/browser_commands.h"
+#include "chrome/browser/ui/browser_tabstrip.h"
+#include "chrome/browser/ui/browser_window.h"
+#include "chrome/browser/ui/gtk/browser_toolbar_gtk.h"
+#include "chrome/browser/ui/gtk/browser_window_gtk.h"
+#include "chrome/browser/ui/gtk/location_bar_view_gtk.h"
+#include "chrome/browser/ui/gtk/view_id_util.h"
+#include "chrome/browser/ui/gtk/zoom_bubble_gtk.h"
+#include "chrome/test/base/in_process_browser_test.h"
+#include "chrome/test/base/ui_test_utils.h"
+#include "content/public/browser/notification_service.h"
+#include "content/public/browser/notification_types.h"
+#include "content/public/browser/web_contents.h"
+#include "content/public/common/page_zoom.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+// TODO(dbeam): share some testing code with LocationBarViewGtkZoomTest.
+
+namespace {
+
+int GetZoomPercent(content::WebContents* contents) {
+  bool dummy;
+  return contents->GetZoomPercent(&dummy, &dummy);
+}
+
+void AssertZoomedIn(content::WebContents* contents) {
+  ASSERT_GT(GetZoomPercent(contents), 100);
+}
+
+void AssertZoomedOut(content::WebContents* contents) {
+  ASSERT_LT(GetZoomPercent(contents), 100);
+}
+
+void AssertAtDefaultZoom(content::WebContents* contents) {
+  ASSERT_EQ(GetZoomPercent(contents), 100);
+}
+
+}
+
+class ZoomBubbleGtkTest : public InProcessBrowserTest {
+ public:
+  ZoomBubbleGtkTest() {
+  }
+
+  virtual ~ZoomBubbleGtkTest() {
+  }
+
+ protected:
+  ZoomBubbleGtk* GetZoomBubble() {
+    return ZoomBubbleGtk::g_bubble;
+  }
+
+  bool ZoomBubbleIsShowing() {
+    return ZoomBubbleGtk::IsShowing();
+  }
+
+  void ExpectLabelTextContains(int percent) {
+    std::string label(gtk_label_get_text(GTK_LABEL(GetZoomBubble()->label_)));
+    EXPECT_FALSE(label.find(base::IntToString(percent)) == std::string::npos);
+  }
+
+  void ResetZoom() {
+    WaitForZoom(content::PAGE_ZOOM_RESET);
+  }
+
+  content::WebContents* SetUpTest() {
+    content::WebContents* contents = chrome::GetActiveWebContents(browser());
+    ResetZoom();
+    AssertAtDefaultZoom(contents);
+    return contents;
+  }
+
+  void ZoomIn() {
+    WaitForZoom(content::PAGE_ZOOM_IN);
+    MakeTestLessFlakey();
+  }
+
+  void ZoomOut() {
+    WaitForZoom(content::PAGE_ZOOM_OUT);
+    MakeTestLessFlakey();
+  }
+
+ private:
+  void MakeTestLessFlakey() {
+    // Stopping the close timer makes this test less able to accidentally fail
+    // if a bot hangs or IPC takes forever.
+    if (GetZoomBubble())
+      GetZoomBubble()->StopTimerIfNecessary();
+  }
+
+  void WaitForZoom(content::PageZoom zoom_action) {
+    content::WindowedNotificationObserver zoom_observer(
+        content::NOTIFICATION_ZOOM_LEVEL_CHANGED,
+        content::NotificationService::AllSources());
+    chrome::Zoom(browser(), zoom_action);
+    zoom_observer.Wait();
+  }
+
+  DISALLOW_COPY_AND_ASSIGN(ZoomBubbleGtkTest);
+};
+
+IN_PROC_BROWSER_TEST_F(ZoomBubbleGtkTest, BubbleSanityTest) {
+  ResetZoom();
+
+  // The bubble assumes it shows only at non-default zoom levels.
+  ZoomIn();
+
+  ZoomBubbleGtk::Close();
+  DCHECK(!GetZoomBubble());
+  EXPECT_FALSE(ZoomBubbleIsShowing());
+
+  GtkWidget* window = GTK_WIDGET(browser()->window()->GetNativeWindow());
+  GtkWidget* zoom_icon = ViewIDUtil::GetWidget(window, VIEW_ID_ZOOM_BUTTON);
+  DCHECK(zoom_icon);
+
+  TabContents* tab_contents = chrome::GetActiveTabContents(browser());
+  DCHECK(tab_contents);
+
+  // Force show a bubble.
+  ZoomBubbleGtk::Show(zoom_icon, tab_contents, true);
+  DCHECK(GetZoomBubble());
+  EXPECT_TRUE(ZoomBubbleIsShowing());
+}
+
+IN_PROC_BROWSER_TEST_F(ZoomBubbleGtkTest, DefaultToZoomedInAndBack) {
+  content::WebContents* contents = SetUpTest();
+
+  ZoomIn();
+  AssertZoomedIn(contents);
+  EXPECT_TRUE(ZoomBubbleIsShowing());
+  ExpectLabelTextContains(110);
+
+  ZoomOut();
+  AssertAtDefaultZoom(contents);
+  EXPECT_FALSE(ZoomBubbleIsShowing());
+}
+
+IN_PROC_BROWSER_TEST_F(ZoomBubbleGtkTest, ZoomInTwiceAndReset) {
+  content::WebContents* contents = SetUpTest();
+
+  ZoomIn();
+  ZoomIn();
+  AssertZoomedIn(contents);
+  EXPECT_TRUE(ZoomBubbleIsShowing());
+  ExpectLabelTextContains(125);
+
+  ResetZoom();
+  AssertAtDefaultZoom(contents);
+  EXPECT_FALSE(ZoomBubbleIsShowing());
+}
+
+IN_PROC_BROWSER_TEST_F(ZoomBubbleGtkTest, DefaultToZoomedOutAndBack) {
+  content::WebContents* contents = SetUpTest();
+
+  ZoomOut();
+  AssertZoomedOut(contents);
+  EXPECT_TRUE(ZoomBubbleIsShowing());
+  ExpectLabelTextContains(90);

[Evan Stade, 2012/10/02 18:35:59]

I suggested you get rid of these hard-coded values, but you didn't.

What I meant was that after zooming out, you could determine the zoom level Z
(from the zoom controller). Make sure this is less than 100. Then make sure that
the label contains the text Z. That way if we change how much each click zooms,
we don't have to change this test.

[Dan Beam, 2012/10/02 19:34:14]

Ah, OK. Done.

+
+  ZoomIn();
+  AssertAtDefaultZoom(contents);
+  EXPECT_FALSE(ZoomBubbleIsShowing());
+}
+
+IN_PROC_BROWSER_TEST_F(ZoomBubbleGtkTest, ZoomOutTwiceAndReset) {
+  content::WebContents* contents = SetUpTest();
+
+  ZoomOut();
+  ZoomOut();
+  AssertZoomedOut(contents);
+  EXPECT_TRUE(ZoomBubbleIsShowing());
+  ExpectLabelTextContains(75);
+
+  ResetZoom();
+  AssertAtDefaultZoom(contents);
+  EXPECT_FALSE(ZoomBubbleIsShowing());
+}