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diff --git a/Tools/TestWebKitAPI/Tests/WebCore/SharedBuffer.cpp b/Tools/TestWebKitAPI/Tests/WebCore/SharedBuffer.cpp
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+++ b/Tools/TestWebKitAPI/Tests/WebCore/SharedBuffer.cpp
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+/*
+ * Copyright (C) 2015 Canon Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+
+#include "Test.h"
+#include <WebCore/SharedBuffer.h>
+#include <wtf/MainThread.h>
+#include <wtf/StringExtras.h>
+
+using namespace WebCore;
+
+namespace TestWebKitAPI {
+
+const char* SharedBufferTestData = "This is a test";
+
+class SharedBufferTest : public testing::Test {
+public:
+    virtual void SetUp() override
+    {
+        WTF::initializeMainThread();
+        
+        // create temp file
+        PlatformFileHandle handle;
+        m_tempFilePath = openTemporaryFile("tempTestFile", handle);
+        writeToFile(handle, SharedBufferTestData, strlen(SharedBufferTestData));
+        closeFile(handle); 
+
+        m_tempEmptyFilePath = openTemporaryFile("tempEmptyTestFile", handle);
+        closeFile(handle); 
+    }
+
+    virtual void TearDown() override
+    {
+        deleteFile(m_tempFilePath);
+        deleteFile(m_tempEmptyFilePath);
+    }
+
+    const String& tempFilePath() { return m_tempFilePath; }
+    const String& tempEmptyFilePath() { return m_tempEmptyFilePath; }
+
+private:
+    String m_tempFilePath;
+    String m_tempEmptyFilePath;
+};
+
+TEST_F(SharedBufferTest, createWithContentsOfMissingFile)
+{
+    RefPtr<SharedBuffer> buffer = SharedBuffer::createWithContentsOfFile(String("not_existing_file"));
+    ASSERT_NULL(buffer);
+}
+
+TEST_F(SharedBufferTest, createWithContentsOfExistingFile)
+{
+    RefPtr<SharedBuffer> buffer = SharedBuffer::createWithContentsOfFile(tempFilePath());
+    ASSERT_NOT_NULL(buffer);
+    EXPECT_TRUE(buffer->size() == strlen(SharedBufferTestData));
+    EXPECT_TRUE(String(SharedBufferTestData) == String(buffer->data(), buffer->size()));
+}
+
+TEST_F(SharedBufferTest, createWithContentsOfExistingEmptyFile)
+{
+    RefPtr<SharedBuffer> buffer = SharedBuffer::createWithContentsOfFile(tempEmptyFilePath());
+    ASSERT_NOT_NULL(buffer);
+    EXPECT_TRUE(buffer->isEmpty());
+}
+
+TEST_F(SharedBufferTest, copyBufferCreatedWithContentsOfExistingFile)
+{
+    RefPtr<SharedBuffer> buffer = SharedBuffer::createWithContentsOfFile(tempFilePath());
+    ASSERT_NOT_NULL(buffer);
+    RefPtr<SharedBuffer> copy = buffer->copy();
+    EXPECT_GT(buffer->size(), 0U);
+    EXPECT_TRUE(buffer->size() == copy->size());
+    EXPECT_TRUE(!memcmp(buffer->data(), copy->data(), buffer->size()));
+}
+
+TEST_F(SharedBufferTest, clearBufferCreatedWithContentsOfExistingFile)
+{
+    RefPtr<SharedBuffer> buffer = SharedBuffer::createWithContentsOfFile(tempFilePath());
+    ASSERT_NOT_NULL(buffer);
+    buffer->clear();
+    EXPECT_TRUE(!buffer->size());
+    EXPECT_TRUE(!buffer->data());
+}
+
+TEST_F(SharedBufferTest, appendBufferCreatedWithContentsOfExistingFile)
+{
+    RefPtr<SharedBuffer> buffer = SharedBuffer::createWithContentsOfFile(tempFilePath());
+    ASSERT_NOT_NULL(buffer);
+    buffer->append("a", 1);
+    EXPECT_TRUE(buffer->size() == (strlen(SharedBufferTestData) + 1));
+    EXPECT_TRUE(!memcmp(buffer->data(), SharedBufferTestData, strlen(SharedBufferTestData)));
+    EXPECT_EQ('a', buffer->data()[strlen(SharedBufferTestData)]);
+}
+
+}