WIP: Introduce CompressibleString

third_party/WebKit/Source/wtf/text/CompressibleStringTest.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 "wtf/text/CompressibleString.h"
+
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace WTF {
+
+// The input and compressed data is copied from
+// components/compression/compression_utils_unittest.cc
+const char InputData[] = {
+    0x68, 0x65, 0x6c, 0x6c, 0x6f, 0x20, 0x77, 0x6f,
+    0x72, 0x6c, 0x64};
+
+const char CompressedData[] = {
+    0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0xcb, 0x48, 0xcd, 0xc9, 0xc9, 0x57, 0x28, 0xcf,
+    0x2f, 0xca, 0x49, 0x01, 0x00, 0x85, 0x11, 0x4a, 0x0d,
+    0x0b, 0x00, 0x00, 0x00};
+
+TEST(CompressibleStringTest, compress)
+{
+    RefPtr<StringImpl> impl = StringImpl::create(InputData, sizeof(InputData));
+    RefPtr<CompressibleStringImpl> string = adoptRef(new CompressibleStringImpl(impl));
+    EXPECT_TRUE(!string->isCompressed());
+    EXPECT_EQ(sizeof(InputData), string->originalContentSizeInBytes());
+    EXPECT_EQ(sizeof(InputData), string->currentSizeInBytes());
+    string->compressString();
+    EXPECT_TRUE(string->isCompressed());
+    EXPECT_EQ(sizeof(InputData), string->originalContentSizeInBytes());
+    EXPECT_EQ(sizeof(CompressedData), string->currentSizeInBytes());
+    string->uncompressString();
+    EXPECT_TRUE(!string->isCompressed());
+    EXPECT_EQ(sizeof(InputData), string->originalContentSizeInBytes());
+    EXPECT_EQ(sizeof(InputData), string->currentSizeInBytes());
+}
+
+} // namespace WTF