Print Preview: Handle a crashed initiator tab by showing a message in PP.

chrome/browser/printing/print_preview_tab_controller_unittest.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/printing/print_preview_tab_controller.h"
 #include "chrome/browser/tabs/tab_strip_model.h"
 #include "chrome/browser/ui/browser_list.h"
 #include "chrome/test/base/browser_with_test_window_test.h"
 #include "chrome/test/base/testing_profile.h"
 #include "content/browser/tab_contents/tab_contents.h"
+#include "content/common/url_constants.h"
 
 typedef BrowserWithTestWindowTest PrintPreviewTabControllerTest;
 
 // Create/Get a preview tab for initiator tab.
 TEST_F(PrintPreviewTabControllerTest, GetOrCreatePreviewTab) {
   ASSERT_TRUE(browser());
   BrowserList::SetLastActive(browser());
   ASSERT_TRUE(BrowserList::GetLastActive());
 
   // Lets start with one window with one tab.
@@ skipping 10 matching lines @@
   ASSERT_TRUE(tab_controller);
 
   // Get the preview tab for initiator tab.
   TabContents* preview_tab =
       tab_controller->GetOrCreatePreviewTab(initiator_tab);
 
   // New print preview tab is created. Current focus is on preview tab.
   EXPECT_EQ(2, browser()->tab_count());
   EXPECT_NE(initiator_tab, preview_tab);
 
-  // Activate initiator_tab.
-  static_cast<RenderViewHostDelegate*>(initiator_tab)->Activate();
-
   // Get the print preview tab for initiator tab.
   TabContents* new_preview_tab =
       tab_controller->GetOrCreatePreviewTab(initiator_tab);
 
   // Preview tab already exists. Tab count remains the same.
   EXPECT_EQ(2, browser()->tab_count());
 
   // 1:1 relationship between initiator and preview tab.
   EXPECT_EQ(new_preview_tab, preview_tab);
 }
@@ skipping 42 matching lines @@
   ASSERT_TRUE(model);
 
   int preview_tab_1_index = model->GetWrapperIndex(preview_tab_1);
   int preview_tab_2_index = model->GetWrapperIndex(preview_tab_2);
 
   EXPECT_NE(-1, preview_tab_1_index);
   EXPECT_NE(-1, preview_tab_2_index);
   // Current tab is |preview_tab_2|.
   EXPECT_EQ(preview_tab_2_index, browser()->active_index());
 
-  // Activate |tab_contents_1| tab.
-  static_cast<RenderViewHostDelegate*>(tab_contents_1)->Activate();
-
   // When we get the preview tab for |tab_contents_1|,
   // |preview_tab_1| is activated and focused.
   tab_controller->GetOrCreatePreviewTab(tab_contents_1);
   EXPECT_EQ(preview_tab_1_index, browser()->active_index());
 }
 
 // Clear the initiator tab details associated with preview tab.
 TEST_F(PrintPreviewTabControllerTest, ClearInitiatorTabDetails) {
   ASSERT_TRUE(browser());
   BrowserList::SetLastActive(browser());
@@ skipping 16 matching lines @@
   TabContents* preview_tab =
       tab_controller->GetOrCreatePreviewTab(initiator_tab);
 
   // New print preview tab is created. Current focus is on preview tab.
   EXPECT_EQ(2, browser()->tab_count());
   EXPECT_NE(initiator_tab, preview_tab);
 
   // Clear the initiator tab details associated with the preview tab.
   tab_controller->EraseInitiatorTabInfo(preview_tab);
 
-  // Activate initiator_tab.
-  static_cast<RenderViewHostDelegate*>(initiator_tab)->Activate();
+  // Get the print preview tab for initiator tab.
+  TabContents* new_preview_tab =
+      tab_controller->GetOrCreatePreviewTab(initiator_tab);
+
+  // New preview tab is created.
+  EXPECT_EQ(3, browser()->tab_count());
+  EXPECT_NE(new_preview_tab, preview_tab);
+}
+
+// Navigate away from the Print Preview tab.
+TEST_F(PrintPreviewTabControllerTest, NavigateFromPrintPreviewTab) {
+  ASSERT_TRUE(browser());
+  BrowserList::SetLastActive(browser());
+  ASSERT_TRUE(BrowserList::GetLastActive());
+
+  // Lets start with one window with one tab.
+  EXPECT_EQ(1u, BrowserList::size());
+  EXPECT_EQ(0, browser()->tab_count());
+  browser()->NewTab();
+  EXPECT_EQ(1, browser()->tab_count());
+
+  // Create a reference to initiator tab contents.
+  TabContents* initiator_tab = browser()->GetSelectedTabContents();
+
+  scoped_refptr<printing::PrintPreviewTabController>
+      tab_controller(new printing::PrintPreviewTabController());
+  ASSERT_TRUE(tab_controller);
+
+  // Get the preview tab for initiator tab.
+  TabContents* preview_tab =
+      tab_controller->GetOrCreatePreviewTab(initiator_tab);
+
+  // New print preview tab is created. Current focus is on preview tab.
+  EXPECT_EQ(2, browser()->tab_count());
+  EXPECT_NE(initiator_tab, preview_tab);
+
+  NavigationController* controller =
+      &browser()->GetTabContentsAt(1)->controller();
+  NavigateAndCommit(controller, GURL(chrome::kAboutBlankURL));
 
   // Get the print preview tab for initiator tab.
   TabContents* new_preview_tab =
       tab_controller->GetOrCreatePreviewTab(initiator_tab);
 
   // New preview tab is created.
   EXPECT_EQ(3, browser()->tab_count());
   EXPECT_NE(new_preview_tab, preview_tab);
+
+  // Get the print preview tab for old preview tab.
+  TabContents* newest_preview_tab =
+      tab_controller->GetOrCreatePreviewTab(preview_tab);
+
+  // Newest preview tab is created and the previously created preview tab is not
+  // merely activated.
+
+  EXPECT_EQ(4, browser()->tab_count());
+  EXPECT_NE(newest_preview_tab, new_preview_tab);
 }