Adding tests for WebContent.DownloadImage()

content/browser/web_contents/web_contents_impl_browsertest.cc

 // Copyright 2013 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/macros.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/values.h"
 #include "build/build_config.h"
 #include "content/browser/frame_host/navigation_entry_impl.h"
 #include "content/browser/renderer_host/render_widget_host_impl.h"
@@ skipping 1149 matching lines @@
 
   // Check that pre-warmed process isn't used.
   EXPECT_NE(renderer_id, web_contents->GetRenderProcessHost()->GetID());
   EXPECT_EQ(1, web_contents->GetController().GetEntryCount());
   NavigationEntry* entry =
       web_contents->GetController().GetLastCommittedEntry();
   ASSERT_TRUE(entry);
   EXPECT_EQ(web_ui_url, entry->GetURL());
 }
 
+namespace {
+
+class DownloadImageObserver {
+ public:
+  MOCK_METHOD5(OnFinishDownloadImage, void(
+      int id,
+      int status_code,
+      const GURL& image_url,
+      const std::vector<SkBitmap>& bitmap,
+      const std::vector<gfx::Size>& sizes));
+  ~DownloadImageObserver() = default;
+};
+
+void DownloadImageTestInternal(Shell* shell,
+                               const GURL &page_url,
+                               const GURL &image_url,
+                               int expected_http_status) {
+  using ::testing::_;
+  using ::testing::InvokeWithoutArgs;
+  using ::testing::Ne;
+
+  // Set up everything.
+  DownloadImageObserver download_image_observer;
+  scoped_refptr<MessageLoopRunner> loop_runner =
+      new MessageLoopRunner();
+
+  // Set up expectation and stub.
+  EXPECT_CALL(download_image_observer,
+              OnFinishDownloadImage(_, expected_http_status, _, _, _))
+      .WillOnce(InvokeWithoutArgs([&]() {
+            loop_runner->Quit();
+          }));
+  ON_CALL(download_image_observer,
+          OnFinishDownloadImage(_, Ne(expected_http_status), _, _, _))
+      .WillByDefault(InvokeWithoutArgs([&]() {
+            loop_runner->Quit();
+          }));
+
+  // Load test URL and start download image.
+  shell->LoadURL(page_url);
+
+  shell->web_contents()->DownloadImage(
+      image_url, false, 1024, false,
+      base::Bind(&DownloadImageObserver::OnFinishDownloadImage,
+                 base::Unretained(&download_image_observer)));
+
+  // Wait for response.
+  loop_runner->Run();
+}
+
+}  // anonymous namespace
+
+IN_PROC_BROWSER_TEST_F(WebContentsImplBrowserTest,
+                       DownloadImage_HttpPage_HttpImage) {

[pkotwicz, 2016/07/04 20:17:17]

I tried this test locally and it fails.

I think that you should have just two tests:
DownloadImage_HttpImage
DownloadImage_Deny_FileImage

You can make both tests call Shell::LoadURL(GURL("about:blank"))

[Zhiqiang Zhang (Slow), 2016/07/05 15:46:58]

Done.

+  ASSERT_TRUE(embedded_test_server()->Start());
+
+  const GURL kPageUrl =
+      embedded_test_server()->GetURL("/simple_page.html");
+  const GURL kImageUrl =
+      embedded_test_server()->GetURL("/image.jpg");
+
+  DownloadImageTestInternal(shell(), kPageUrl, kImageUrl, 0);
+}
+
+IN_PROC_BROWSER_TEST_F(WebContentsImplBrowserTest,
+                       DownloadImage_FilePage_HttpImage) {
+  ASSERT_TRUE(embedded_test_server()->Start());
+
+  const GURL kPageUrl =
+      GetTestUrl("", "simple_page.html");
+  const GURL kImageUrl =
+      embedded_test_server()->GetURL("/image.jpg");
+
+  DownloadImageTestInternal(shell(), kPageUrl, kImageUrl, 200);
+}
+
+IN_PROC_BROWSER_TEST_F(WebContentsImplBrowserTest,
+                       DownloadImage_Deny_HttpPage_FileImage) {
+  ASSERT_TRUE(embedded_test_server()->Start());
+
+  const GURL kPageUrl =
+      embedded_test_server()->GetURL("/simple_page.html");
+  const GURL kImageUrl =
+      GetTestUrl("", "image.jpg");
+
+  DownloadImageTestInternal(shell(), kPageUrl, kImageUrl, 0);
+}
+
+IN_PROC_BROWSER_TEST_F(WebContentsImplBrowserTest,
+                       DownloadImage_Deny_FilePage_FileImage) {
+  const GURL kPageUrl = GetTestUrl("", "simple-page.html");
+  const GURL kImageUrl = GetTestUrl("", "image.jpg");
+
+  DownloadImageTestInternal(shell(), kPageUrl, kImageUrl, 0);
+}
+
 }  // namespace content