Print Preview: Add a test for activating the initiator tab on print.

chrome/browser/ui/webui/print_preview_handler_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 "base/command_line.h"
+#include "base/json/json_writer.h"
+#include "base/values.h"
+#include "chrome/browser/browser_process.h"
+#include "chrome/browser/printing/background_printing_manager.h"
+#include "chrome/browser/printing/print_preview_tab_controller.h"
+#include "chrome/browser/ui/browser_list.h"
+#include "chrome/browser/ui/tab_contents/tab_contents_wrapper.h"
+#include "chrome/browser/ui/webui/print_preview_handler.h"
+#include "chrome/browser/ui/webui/print_preview_ui.h"
+#include "chrome/common/chrome_switches.h"
+#include "chrome/test/base/browser_with_test_window_test.h"
+#include "content/browser/tab_contents/tab_contents.h"
+#include "printing/print_job_constants.h"
+
+typedef BrowserWithTestWindowTest PrintPreviewHandlerTest;
+
+// When users hit print in the print preview tab, the print preview tab hides
+// and the focus should return to the initiator tab.
+TEST_F(PrintPreviewHandlerTest, ActivateInitiatorTabOnPrint) {
+#if !defined(GOOGLE_CHROME_BUILD) || defined(OS_CHROMEOS)
+  CommandLine::ForCurrentProcess()->AppendSwitch(switches::kEnablePrintPreview);
+#endif
+  ASSERT_TRUE(browser());
+  BrowserList::SetLastActive(browser());
+  ASSERT_TRUE(BrowserList::GetLastActive());
+
+  browser()->NewTab();
+  TabContentsWrapper* initiator_tab =
+      browser()->GetSelectedTabContentsWrapper();
+  ASSERT_TRUE(initiator_tab);
+
+  printing::PrintPreviewTabController* controller =
+      printing::PrintPreviewTabController::GetInstance();
+  ASSERT_TRUE(controller);
+
+  TabContentsWrapper* preview_tab =
+      controller->GetOrCreatePreviewTab(initiator_tab);
+  EXPECT_EQ(2, browser()->tab_count());
+
+  browser()->NewTab();
+  EXPECT_EQ(3, browser()->tab_count());
+
+  PrintPreviewUI* preview_ui =
+      static_cast<PrintPreviewUI*>(preview_tab->web_ui());
+  ASSERT_TRUE(preview_ui);
+
+  // Set the minimal dummy settings to make the HandlePrint() code happy.
+  DictionaryValue value;
+  value.SetBoolean(printing::kSettingColor, false);
+  value.SetBoolean(printing::kSettingPrintToPDF, false);
+
+  // Put |value| in to |args| as a JSON string.
+  std::string json_string;
+  base::JSONWriter::Write(&value, false, &json_string);
+  ListValue args;
+  args.Append(new StringValue(json_string));  // |args| takes ownership.
+  preview_ui->handler_->HandlePrint(&args);
+
+  EXPECT_EQ(2, browser()->tab_count());
+  EXPECT_EQ(initiator_tab, browser()->GetSelectedTabContentsWrapper());

[kmadhusu, 2011/08/31 17:24:39]

Can you also verify that background printing manager has preview tab?

[Lei Zhang, 2011/08/31 21:43:08]

Done.

+}