/*
 * Copyright (C) 2011 Google 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:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * 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.
 *     * Neither the name of Google Inc. nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
 * OWNER OR 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/Assertions.h>
#include <wtf/text/CString.h>
#include <wtf/text/StringBuilder.h>
#include <wtf/text/WTFString.h>

namespace WTF {

// For EXPECT_EQ(String, String)
std::ostream& operator<<(std::ostream& os, const String& string)
{
    return os << string.utf8().data();
}

}

namespace TestWebKitAPI {

void expectBuilderContent(const char* expected, const StringBuilder& builder)
{
    // Not using builder.toString() or builder.toStringPreserveCapacity() because they all
    // change internal state of builder.
    EXPECT_EQ(String(expected), String(builder.characters(), builder.length()));
}

void expectEmpty(const StringBuilder& builder)
{
    EXPECT_EQ(0U, builder.length());
    EXPECT_TRUE(builder.isEmpty());
    EXPECT_EQ(0, builder.characters());
}

TEST(StringBuilderTest, DefaultConstructor)
{
    StringBuilder builder;
    expectEmpty(builder);
}

TEST(StringBuilderTest, Append)
{
    StringBuilder builder;
    builder.append(String("0123456789"));
    expectBuilderContent("0123456789", builder);
    builder.append("abcd");
    expectBuilderContent("0123456789abcd", builder);
    builder.append("efgh", 3);
    expectBuilderContent("0123456789abcdefg", builder);
    builder.append("");
    expectBuilderContent("0123456789abcdefg", builder);
    builder.append('#');
    expectBuilderContent("0123456789abcdefg#", builder);

    builder.toString(); // Test after reifyString().
    StringBuilder builder1;
    builder.append("", 0);
    expectBuilderContent("0123456789abcdefg#", builder);
    builder1.append(builder.characters(), builder.length());
    builder1.append("XYZ");
    builder.append(builder1.characters(), builder1.length());
    expectBuilderContent("0123456789abcdefg#0123456789abcdefg#XYZ", builder);
}

TEST(StringBuilderTest, ToString)
{
    StringBuilder builder;
    builder.append("0123456789");
    String string = builder.toString();
    ASSERT_EQ(String("0123456789"), string);
    ASSERT_EQ(string.impl(), builder.toString().impl());

    // Changing the StringBuilder should not affect the original result of toString().
    builder.append("abcdefghijklmnopqrstuvwxyz");
    ASSERT_EQ(String("0123456789"), string);

    // Changing the StringBuilder should not affect the original result of toString() in case the capacity is not changed.
    builder.reserveCapacity(200);
    string = builder.toString();
    ASSERT_EQ(String("0123456789abcdefghijklmnopqrstuvwxyz"), string);
    builder.append("ABC");
    ASSERT_EQ(String("0123456789abcdefghijklmnopqrstuvwxyz"), string);

    // Changing the original result of toString() should not affect the content of the StringBuilder.
    String string1 = builder.toString();
    ASSERT_EQ(String("0123456789abcdefghijklmnopqrstuvwxyzABC"), string1);
    string1.append("DEF");
    ASSERT_EQ(String("0123456789abcdefghijklmnopqrstuvwxyzABC"), builder.toString());
    ASSERT_EQ(String("0123456789abcdefghijklmnopqrstuvwxyzABCDEF"), string1);

    // Resizing the StringBuilder should not affect the original result of toString().
    string1 = builder.toString();
    builder.resize(10);
    builder.append("###");
    ASSERT_EQ(String("0123456789abcdefghijklmnopqrstuvwxyzABC"), string1);
}

TEST(StringBuilderTest, ToStringPreserveCapacity)
{
    StringBuilder builder;
    builder.append("0123456789");
    String string = builder.toStringPreserveCapacity();
    ASSERT_EQ(String("0123456789"), string);
    ASSERT_EQ(string.impl(), builder.toStringPreserveCapacity().impl());
    ASSERT_EQ(string.characters(), builder.characters());

    // Changing the StringBuilder should not affect the original result of toStringPreserveCapacity().
    builder.append("abcdefghijklmnopqrstuvwxyz");
    ASSERT_EQ(String("0123456789"), string);

    // Changing the StringBuilder should not affect the original result of toStringPreserveCapacity() in case the capacity is not changed.
    builder.reserveCapacity(200);
    string = builder.toStringPreserveCapacity();
    ASSERT_EQ(string.characters(), builder.characters());
    ASSERT_EQ(String("0123456789abcdefghijklmnopqrstuvwxyz"), string);
    builder.append("ABC");
    ASSERT_EQ(String("0123456789abcdefghijklmnopqrstuvwxyz"), string);

    // Changing the original result of toStringPreserveCapacity() should not affect the content of the StringBuilder.
    String string1 = builder.toStringPreserveCapacity();
    ASSERT_EQ(string1.characters(), builder.characters());
    ASSERT_EQ(String("0123456789abcdefghijklmnopqrstuvwxyzABC"), string1);
    string1.append("DEF");
    ASSERT_EQ(String("0123456789abcdefghijklmnopqrstuvwxyzABC"), builder.toStringPreserveCapacity());
    ASSERT_EQ(String("0123456789abcdefghijklmnopqrstuvwxyzABCDEF"), string1);

    // Resizing the StringBuilder should not affect the original result of toStringPreserveCapacity().
    string1 = builder.toStringPreserveCapacity();
    ASSERT_EQ(string.characters(), builder.characters());
    builder.resize(10);
    builder.append("###");
    ASSERT_EQ(String("0123456789abcdefghijklmnopqrstuvwxyzABC"), string1);
}

TEST(StringBuilderTest, Clear)
{
    StringBuilder builder;
    builder.append("0123456789");
    builder.clear();
    expectEmpty(builder);
}

TEST(StringBuilderTest, Array)
{
    StringBuilder builder;
    builder.append("0123456789");
    EXPECT_EQ('0', static_cast<char>(builder[0]));
    EXPECT_EQ('9', static_cast<char>(builder[9]));
    builder.toString(); // Test after reifyString().
    EXPECT_EQ('0', static_cast<char>(builder[0]));
    EXPECT_EQ('9', static_cast<char>(builder[9]));
}

TEST(StringBuilderTest, Resize)
{
    StringBuilder builder;
    builder.append("0123456789");
    builder.resize(10);
    EXPECT_EQ(10U, builder.length());
    expectBuilderContent("0123456789", builder);
    builder.resize(8);
    EXPECT_EQ(8U, builder.length());
    expectBuilderContent("01234567", builder);

    builder.toString();
    builder.resize(7);
    EXPECT_EQ(7U, builder.length());
    expectBuilderContent("0123456", builder);
    builder.resize(0);
    expectEmpty(builder);
}

} // namespace