Make SharedGpuContext recover automatically after a context loss

third_party/WebKit/Source/platform/graphics/gpu/SharedGpuContextTest.cpp

+// 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 "platform/graphics/gpu/SharedGpuContext.h"
+
+#include "gpu/command_buffer/client/gles2_interface.h"
+#include "platform/graphics/test/FakeGLES2Interface.h"
+#include "platform/graphics/test/FakeWebGraphicsContext3DProvider.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "third_party/khronos/GLES2/gl2ext.h"
+
+using testing::Test;
+
+namespace blink {
+
+namespace {
+
+class SharedGpuContextTest : public Test {
+public:
+    void SetUp() override
+    {
+        SharedGpuContext::setContextProviderFactoryForTesting([this] {
+            m_gl.setIsContextLost(false);
+            return std::unique_ptr<WebGraphicsContext3DProvider>(new FakeWebGraphicsContext3DProvider(&m_gl));
+        });
+    }
+
+    void TearDown() override
+    {
+        SharedGpuContext::setContextProviderFactoryForTesting(nullptr);
+    }
+
+    FakeGLES2Interface m_gl;
+};
+
+TEST_F(SharedGpuContextTest, contextLossAutoRecovery)
+{
+    EXPECT_TRUE(SharedGpuContext::isValid());
+    unsigned contextId = SharedGpuContext::contextId();
+    m_gl.setIsContextLost(true);
+    EXPECT_FALSE(SharedGpuContext::isValidWithoutRestoring());
+    EXPECT_TRUE(SharedGpuContext::isValid());
+    EXPECT_NE(contextId, SharedGpuContext::contextId());
+}
+
+
+} // unnamed namespace
+
+} // blink