Print preview not showing if default print is invalid.

chrome/renderer/print_web_view_helper_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/common/chrome_switches.h"
 #include "chrome/common/print_messages.h"
 #include "chrome/renderer/print_web_view_helper.h"
 #include "chrome/test/base/render_view_test.h"
 #include "printing/print_job_constants.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ skipping 328 matching lines @@
       EXPECT_NE(0U, preview_param.a.data_size);
     }
   }
 
   void VerifyPrintFailed(bool did_fail) {
     bool print_failed = (render_thread_.sink().GetUniqueMessageMatching(
         PrintHostMsg_PrintingFailed::ID) != NULL);
     EXPECT_EQ(did_fail, print_failed);
   }
 
+  void VerifyPrintPreviewInvalidPrinterSettings(bool settings_invalid) {
+    bool print_preview_invalid_printer_settings =
+        (render_thread_.sink().GetUniqueMessageMatching(
+            PrintHostMsg_PrintPreviewInvalidPrinterSettings::ID) != NULL);
+    EXPECT_EQ(settings_invalid, print_preview_invalid_printer_settings);
+  }
+
   // |page_number| is 0-based.
   void VerifyDidPreviewPage(bool generate_draft_pages, int page_number) {
     bool msg_found = false;
     size_t msg_count = render_thread_.sink().message_count();
     for (size_t i = 0; i < msg_count; ++i) {
       const IPC::Message* msg = render_thread_.sink().GetMessageAt(i);
       if (msg->type() == PrintHostMsg_DidPreviewPage::ID) {
         PrintHostMsg_DidPreviewPage::Param page_param;
         PrintHostMsg_DidPreviewPage::Read(msg, &page_param);
         if (page_param.a.page_number == page_number) {
@@ skipping 119 matching lines @@
 TEST_F(PrintWebViewHelperPreviewTest, OnPrintForPrintPreviewFail) {
   LoadHTML(kPrintPreviewHTML);
 
   // An empty dictionary should fail.
   DictionaryValue empty_dict;
   PrintWebViewHelper::Get(view_)->OnPrintForPrintPreview(empty_dict);
 
   VerifyPrintFailed(true);
   VerifyPagesPrinted(false);
 }
+
+// Tests that when default printer has invalid printer settings, print preview
+// receives error message.
+TEST_F(PrintWebViewHelperPreviewTest,
+       OnPrintPreviewUsingInvalidPrinterSettings) {
+  LoadHTML(kPrintPreviewHTML);
+
+  PrintWebViewHelper::Get(view_)->OnInitiatePrintPreview();
+
+  // Set mock printer to provide invalid settings.
+  render_thread_.printer()->UseInvalidSettings();
+
+  // Fill in some dummy values.
+  DictionaryValue dict;
+  CreatePrintSettingsDictionary(&dict);
+  PrintWebViewHelper::Get(view_)->OnPrintPreview(dict);
+
+  // We should have received invalid printer settings from |printer_|.
+  VerifyPrintPreviewInvalidPrinterSettings(true);
+  EXPECT_EQ(0, render_thread_.print_preview_pages_remaining());
+
+  // It should receive the invalid printer settings message only.
+  VerifyPrintPreviewFailed(false);
+  VerifyPrintPreviewGenerated(false);
+}
+
+TEST_F(PrintWebViewHelperPreviewTest,
+       OnPrintForPrintPreviewUsingInvalidPrinterSettings) {
+  LoadHTML(kPrintPreviewHTML);
+
+  // Set mock printer to provide invalid settings.
+  render_thread_.printer()->UseInvalidSettings();
+
+  // Fill in some dummy values.
+  DictionaryValue dict;
+  CreatePrintSettingsDictionary(&dict);
+  PrintWebViewHelper::Get(view_)->OnPrintForPrintPreview(dict);
+
+  VerifyPagesPrinted(false);
+}
+
 #endif  // !defined(OS_CHROMEOS)