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diff --git a/Tools/TestWebKitAPI/Tests/WTF/StringImpl.cpp b/Tools/TestWebKitAPI/Tests/WTF/StringImpl.cpp
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+++ b/Tools/TestWebKitAPI/Tests/WTF/StringImpl.cpp
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+/*
+ * Copyright (C) 2012 Apple 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 <wtf/text/StringImpl.h>
+
+namespace TestWebKitAPI {
+
+TEST(WTF, StringImplCreationFromLiteral)
+{
+    // Constructor using the template to determine the size.
+    RefPtr<StringImpl> stringWithTemplate = StringImpl::createFromLiteral("Template Literal");
+    ASSERT_EQ(strlen("Template Literal"), stringWithTemplate->length());
+    ASSERT_TRUE(equal(stringWithTemplate.get(), "Template Literal"));
+    ASSERT_TRUE(stringWithTemplate->is8Bit());
+    ASSERT_TRUE(stringWithTemplate->hasTerminatingNullCharacter());
+
+    // Constructor taking the size explicitely.
+    const char* programmaticStringData = "Explicit Size Literal";
+    RefPtr<StringImpl> programmaticString = StringImpl::createFromLiteral(programmaticStringData, strlen(programmaticStringData));
+    ASSERT_EQ(strlen(programmaticStringData), programmaticString->length());
+    ASSERT_TRUE(equal(programmaticString.get(), programmaticStringData));
+    ASSERT_EQ(programmaticStringData, reinterpret_cast<const char*>(programmaticString->characters8()));
+    ASSERT_TRUE(programmaticString->is8Bit());
+    ASSERT_TRUE(programmaticString->hasTerminatingNullCharacter());
+
+    // Constructor without explicit size.
+    const char* stringWithoutLengthLiteral = "No Size Literal";
+    RefPtr<StringImpl> programmaticStringNoLength = StringImpl::createFromLiteral(stringWithoutLengthLiteral);
+    ASSERT_EQ(strlen(stringWithoutLengthLiteral), programmaticStringNoLength->length());
+    ASSERT_TRUE(equal(programmaticStringNoLength.get(), stringWithoutLengthLiteral));
+    ASSERT_EQ(stringWithoutLengthLiteral, reinterpret_cast<const char*>(programmaticStringNoLength->characters8()));
+    ASSERT_TRUE(programmaticStringNoLength->is8Bit());
+    ASSERT_TRUE(programmaticStringNoLength->hasTerminatingNullCharacter());
+}
+
+TEST(WTF, StringImplFromLiteralLoop16BitConversion)
+{
+    RefPtr<StringImpl> controlString = StringImpl::create("Template Literal");
+    for (size_t i = 0; i < 10; ++i) {
+        RefPtr<StringImpl> string = StringImpl::createFromLiteral("Template Literal");
+
+        ASSERT_EQ(0, memcmp(controlString->characters(), string->characters(), controlString->length() * sizeof(UChar)));
+        ASSERT_TRUE(string->has16BitShadow());
+    }
+}
+
+} // namespace TestWebKitAPI