Add a full Blimp integration test.

blimp/engine/browser_tests/integration_test.cc

Index: blimp/engine/browser_tests/integration_test.cc
diff --git a/blimp/engine/browser_tests/integration_test.cc b/blimp/engine/browser_tests/integration_test.cc
new file mode 100644
index 0000000000000000000000000000000000000000..d0c0f00a78879b4fc639270788b3053d05cea026
--- /dev/null
+++ b/blimp/engine/browser_tests/integration_test.cc
@@ -0,0 +1,160 @@
+// Copyright 2016 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/callback.h"
+#include "base/macros.h"
+#include "base/memory/ptr_util.h"
+#include "base/run_loop.h"
+#include "base/synchronization/waitable_event.h"
+#include "base/threading/thread_restrictions.h"
+#include "base/time/time.h"
+#include "blimp/client/public/blimp_client_context.h"
+#include "blimp/client/public/contents/blimp_contents.h"
+#include "blimp/client/public/contents/blimp_contents_observer.h"
+#include "blimp/client/public/contents/blimp_contents_view.h"
+#include "blimp/client/public/contents/blimp_navigation_controller.h"
+#include "blimp/client/support/compositor/compositor_dependencies_impl.h"
+#include "blimp/client/test/compositor/test_blimp_embedder_compositor.h"
+#include "blimp/client/test/test_blimp_client_context_delegate.h"
+#include "blimp/engine/browser_tests/blimp_browser_test.h"
+#include "blimp/engine/browser_tests/blimp_contents_view_readback_helper.h"
+#include "blimp/engine/browser_tests/waitable_content_pump.h"
+#include "content/public/browser/browser_thread.h"
+#include "content/public/test/browser_test.h"
+#include "testing/gmock/include/gmock/gmock.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "third_party/skia/include/core/SkBitmap.h"
+#include "third_party/skia/include/core/SkColor.h"
+#include "third_party/skia/include/core/SkGraphics.h"
+#include "ui/gl/gl_implementation.h"
+#include "ui/gl/init/gl_factory.h"
+
+namespace blimp {
+namespace {
+
+class PageLoadWaitBlimpContentsObserver : public client::BlimpContentsObserver {
+ public:
+  explicit PageLoadWaitBlimpContentsObserver(client::BlimpContents* contents)
+      : client::BlimpContentsObserver(contents), waiter_(nullptr) {}
+  ~PageLoadWaitBlimpContentsObserver() override = default;
+
+  // BlimpContentsObserver implementation.
+  void OnPageLoadingStateChanged(bool loading) override {
+    if (!loading && waiter_)
+      waiter_->Signal();
+  }
+
+  void WaitForPageLoadToFinish(base::WaitableEvent* waiter) {
+    waiter_ = waiter;
+  }
+
+ private:
+  base::WaitableEvent* waiter_;
+};
+
+class BlimpIntegrationTest : public BlimpBrowserTest {
+ public:
+  BlimpIntegrationTest() {}
+
+ protected:
+  void SetUpOnMainThread() override {
+    BlimpBrowserTest::SetUpOnMainThread();
+
+    AllowUIWaits();
+
+    {
+      base::ThreadRestrictions::ScopedAllowIO allow_io;
+      ASSERT_TRUE(gl::init::InitializeGLOneOff());
+    }
+    SkGraphics::Init();
+
+    // After GL is initialized, build a gl::DisableNullDrawGLBindings to make
+    // sure GL actually draws for this test.
+    scoped_enable_gl_bindings_ =
+        base::MakeUnique<gl::DisableNullDrawGLBindings>();
+
+    std::unique_ptr<client::CompositorDependencies> compositor_dependencies =
+        base::MakeUnique<client::CompositorDependenciesImpl>();
+
+    compositor_ = base::MakeUnique<client::TestBlimpEmbedderCompositor>(
+        compositor_dependencies.get());
+
+    delegate_ = base::MakeUnique<client::TestBlimpClientContextDelegate>();
+
+    context_ = base::WrapUnique<client::BlimpClientContext>(
+        client::BlimpClientContext::Create(
+            content::BrowserThread::GetTaskRunnerForThread(
+                content::BrowserThread::IO),
+            content::BrowserThread::GetTaskRunnerForThread(
+                content::BrowserThread::FILE),
+            std::move(compositor_dependencies)));
+
+    context_->SetDelegate(delegate_.get());
+    context_->ConnectWithAssignment(GetAssignment());
+    contents_ = context_->CreateBlimpContents(nullptr);
+
+    compositor_->SetContentLayer(contents_->GetView()->GetLayer());
+  }
+
+  void TearDownOnMainThread() override {
+    // Tear down the client objects.  Ordering is important.
+    contents_.reset();
+    compositor_.reset();
+    context_.reset();
+    delegate_.reset();
+    BlimpBrowserTest::TearDownOnMainThread();
+  }
+
+  std::unique_ptr<client::BlimpClientContextDelegate> delegate_;
+  std::unique_ptr<client::BlimpClientContext> context_;
+  std::unique_ptr<client::TestBlimpEmbedderCompositor> compositor_;
+  std::unique_ptr<client::BlimpContents> contents_;
+
+ private:
+  std::unique_ptr<gl::DisableNullDrawGLBindings> scoped_enable_gl_bindings_;
+
+  DISALLOW_COPY_AND_ASSIGN(BlimpIntegrationTest);
+};
+
+IN_PROC_BROWSER_TEST_F(BlimpIntegrationTest, TestFullRenderPath) {
+  WaitableContentPump waiter;
+
+  PageLoadWaitBlimpContentsObserver observer(contents_.get());
+
+  // Set up the compositor viewport to be a 1x1 screen.  We only need a single
+  // pixel for validation.
+  compositor_->SetSize(gfx::Size(1, 1));
+  contents_->GetView()->SetSizeAndScale(gfx::Size(1, 1), 1.f);
+
+  // Show the BlimpContents and trigger a load of a URL that sets a red
+  // background.
+  contents_->Show();
+  contents_->GetNavigationController().LoadURL(
+      GURL("data:text/html;charset=utf-8,<html><body "
+           "style=background-color:#FF0000></body></html>"));
+
+  // Block the test execution until loading finishes.
+  observer.WaitForPageLoadToFinish(waiter.event());
+  waiter.Wait();
+
+  // Grab a readback of the page content.  Block the test execution until the
+  // readback completes.
+  BlimpContentsViewReadbackHelper readback_helper;
+  contents_->GetView()->CopyFromCompositingSurface(
+      readback_helper.GetCallback(), true);
+  waiter.WaitFor(readback_helper.event());
+
+  // Validate the readback bitmap basic characteristics.
+  SkBitmap* bitmap = readback_helper.GetBitmap();
+  EXPECT_NE(nullptr, bitmap);
+  EXPECT_EQ(1, bitmap->width());
+  EXPECT_EQ(1, bitmap->height());
+
+  // Validate the readback bitmap contents.
+  SkAutoLockPixels bitmap_lock(*bitmap);
+  EXPECT_EQ(SK_ColorRED, bitmap->getColor(0, 0));
+}
+
+}  // namespace
+}  // namespace blimp