Use a mocked compositor for unit tests

chrome/test/base/in_process_browser_test.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/test/base/in_process_browser_test.h"
 
 #include "base/command_line.h"
 #include "base/debug/stack_trace.h"
 #include "base/file_path.h"
 #include "base/file_util.h"
@@ skipping 18 matching lines @@
 #include "chrome/test/base/test_launcher_utils.h"
 #include "chrome/test/base/testing_browser_process.h"
 #include "chrome/test/base/ui_test_utils.h"
 #include "content/browser/browser_thread.h"
 #include "content/browser/renderer_host/render_process_host.h"
 #include "content/browser/tab_contents/tab_contents.h"
 #include "content/common/content_notification_types.h"
 #include "content/renderer/mock_content_renderer_client.h"
 #include "net/base/mock_host_resolver.h"
 #include "net/test/test_server.h"
+#include "ui/gfx/gl/gl_switches.h"
+
+#if defined(VIEWS_COMPOSITOR)
+#include "ui/gfx/compositor/test_compositor.h"
+#include "views/widget/widget.h"
+#endif
 
 #if defined(OS_CHROMEOS)
 #include "chrome/browser/chromeos/audio_handler.h"
 #endif
 
 // Passed as value of kTestType.
 static const char kBrowserTestType[] = "browser";
 
+#if defined(VIEWS_COMPOSITOR)
+static ui::Compositor* TestCreateCompositor(ui::CompositorDelegate* owner) {
+  return new ui::TestCompositor(owner);
+}
+#endif
+
 InProcessBrowserTest::InProcessBrowserTest()
     : browser_(NULL),
       show_window_(false),
       dom_automation_enabled_(false),
       tab_closeable_state_watcher_enabled_(false) {
 #if defined(OS_MACOSX)
   // TODO(phajdan.jr): Make browser_tests self-contained on Mac, remove this.
   // Before we run the browser, we have to hack the path to the exe to match
   // what it would be if Chrome was running, because it is used to fork renderer
   // processes, on Linux at least (failure to do so will cause a browser_test to
@@ skipping 64 matching lines @@
   net::ScopedDefaultHostResolverProc scoped_host_resolver_proc(
       host_resolver_.get());
 
   BrowserTestBase::SetUp();
 }
 
 void InProcessBrowserTest::PrepareTestCommandLine(CommandLine* command_line) {
   // Propagate commandline settings from test_launcher_utils.
   test_launcher_utils::PrepareBrowserCommandLineForTests(command_line);
 
+  // Use MesaGL as the GL implementation, as desktopgl/egl is not present on
+  // test bots yet.
+  EXPECT_TRUE(
+      test_launcher_utils::OverrideGLImplementation(

[Paweł Hajdan Jr., 2011/10/13 20:08:13]

Do you also want things to apply to content? If so, you should probably use
BrowserTestBase.

[danakj, 2011/10/14 15:15:13]

Yes I should, thanks !

+          command_line, gfx::kGLImplementationOSMesaName));
+
+#if defined(VIEWS_COMPOSITOR)
+  // Use a mock compositor that noops draws.
+  views::Widget::set_compositor_factory_for_testing(&TestCreateCompositor);
+#endif
+
   if (dom_automation_enabled_)
     command_line->AppendSwitch(switches::kDomAutomationController);
 
   // This is a Browser test.
   command_line->AppendSwitchASCII(switches::kTestType, kBrowserTestType);
 
 #if defined(OS_WIN)
   // The Windows sandbox requires that the browser and child processes are the
   // same binary.  So we launch browser_process.exe which loads chrome.dll
   command_line->AppendSwitchPath(switches::kBrowserSubprocessPath,
@@ skipping 151 matching lines @@
     return;
 
   // Invoke CloseAllBrowsersAndMayExit on a running message loop.
   // CloseAllBrowsersAndMayExit exits the message loop after everything has been
   // shut down properly.
   MessageLoopForUI::current()->PostTask(
       FROM_HERE,
       NewRunnableFunction(&BrowserList::AttemptExit));
   ui_test_utils::RunMessageLoop();
 }