root/Source/core/html/track/vtt/BufferedLineReaderTest.cpp

DEFINITIONS

1. TEST
2. TEST
3. TEST
4. TEST
5. TEST
6. TEST
7. TEST
8. TEST
9. TEST
10. TEST
11. TEST
12. LineBreakString
13. MakeTestData
14. TEST
15. TEST
16. TEST
17. TEST
18. TEST

/*
 * Copyright (C) 2013, Opera Software ASA. 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,
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 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 */

#include "config.h"
#include "core/html/track/vtt/BufferedLineReader.h"

#include "wtf/text/CString.h"
#include "wtf/text/WTFString.h"
#include "wtf/unicode/CharacterNames.h"

#include <gtest/gtest.h>

using WebCore::BufferedLineReader;

namespace {

TEST(BufferedLineReader, Constructor)
{
    BufferedLineReader reader;
    ASSERT_FALSE(reader.isAtEndOfStream());
    String line;
    ASSERT_FALSE(reader.getLine(line));
}

TEST(BufferedLineReader, EOSNoInput)
{
    BufferedLineReader reader;
    String line;
    ASSERT_FALSE(reader.getLine(line));
    reader.setEndOfStream();
    // No input observed, so still no line.
    ASSERT_FALSE(reader.getLine(line));
}

TEST(BufferedLineReader, EOSInput)
{
    BufferedLineReader reader;
    reader.append("A");
    reader.setEndOfStream();
    String line;
    ASSERT_TRUE(reader.getLine(line));
    ASSERT_EQ(line, "A");
}

TEST(BufferedLineReader, EOSMultipleReads_1)
{
    BufferedLineReader reader;
    reader.append("A");
    reader.setEndOfStream();
    String line;
    ASSERT_TRUE(reader.getLine(line));
    ASSERT_EQ(line, "A");
    // No more lines returned.
    ASSERT_FALSE(reader.getLine(line));
    ASSERT_FALSE(reader.getLine(line));
}

TEST(BufferedLineReader, EOSMultipleReads_2)
{
    BufferedLineReader reader;
    reader.append("A\n");
    reader.setEndOfStream();
    String line;
    ASSERT_TRUE(reader.getLine(line));
    ASSERT_EQ(line, "A");
    // No more lines returned.
    ASSERT_FALSE(reader.getLine(line));
    ASSERT_FALSE(reader.getLine(line));
}

TEST(BufferedLineReader, LineEndingCR)
{
    BufferedLineReader reader;
    reader.append("X\rY");
    reader.setEndOfStream();
    String line;
    ASSERT_TRUE(reader.getLine(line));
    ASSERT_EQ(line, "X");
    ASSERT_TRUE(reader.getLine(line));
    ASSERT_EQ(line, "Y");
}

TEST(BufferedLineReader, LineEndingCR_EOS)
{
    BufferedLineReader reader;
    reader.append("X\r");
    reader.setEndOfStream();
    String line;
    ASSERT_TRUE(reader.getLine(line));
    ASSERT_EQ(line, "X");
    ASSERT_FALSE(reader.getLine(line));
}

TEST(BufferedLineReader, LineEndingLF)
{
    BufferedLineReader reader;
    reader.append("X\nY");
    reader.setEndOfStream();
    String line;
    ASSERT_TRUE(reader.getLine(line));
    ASSERT_EQ(line, "X");
    ASSERT_TRUE(reader.getLine(line));
    ASSERT_EQ(line, "Y");
}

TEST(BufferedLineReader, LineEndingLF_EOS)
{
    BufferedLineReader reader;
    reader.append("X\n");
    reader.setEndOfStream();
    String line;
    ASSERT_TRUE(reader.getLine(line));
    ASSERT_EQ(line, "X");
    ASSERT_FALSE(reader.getLine(line));
}

TEST(BufferedLineReader, LineEndingCRLF)
{
    BufferedLineReader reader;
    reader.append("X\r\nY");
    reader.setEndOfStream();
    String line;
    ASSERT_TRUE(reader.getLine(line));
    ASSERT_EQ(line, "X");
    ASSERT_TRUE(reader.getLine(line));
    ASSERT_EQ(line, "Y");
}

TEST(BufferedLineReader, LineEndingCRLF_EOS)
{
    BufferedLineReader reader;
    reader.append("X\r\n");
    reader.setEndOfStream();
    String line;
    ASSERT_TRUE(reader.getLine(line));
    ASSERT_EQ(line, "X");
    ASSERT_FALSE(reader.getLine(line));
}

enum LineBreakType {
    Cr,
    Lf,
    CrLf
};

String LineBreakString(LineBreakType type)
{
    static const char breakStrings[] = "\r\n";
    return String(type == Lf ? breakStrings + 1 : breakStrings, type == CrLf ? 2 : 1);
}

String MakeTestData(const char** lines, const LineBreakType* breaks, int count)
{
    StringBuilder builder;
    for (int i = 0; i < count; ++i) {
        builder.append(lines[i]);
        builder.append(LineBreakString(breaks[i]));
    }
    return builder.toString();
}

const size_t blockSizes[] = { 64, 32, 16, 8, 4, 2, 1, 3, 5, 7, 9, 11, 13, 17, 19, 23 };

TEST(BufferedLineReader, BufferSizes)
{
    const char* lines[] = {
        "aaaaaaaaaaaaaaaa",
        "bbbbbbbbbb",
        "ccccccccccccc",
        "",
        "dddddd",
        "",
        "eeeeeeeeee"
    };
    const LineBreakType breaks[] = { Lf, Lf, Lf, Lf, Lf, Lf, Lf };
    const size_t numTestLines = WTF_ARRAY_LENGTH(lines);
    COMPILE_ASSERT(numTestLines == WTF_ARRAY_LENGTH(breaks), DifferentLengths_lines_and_breaks);
    String data = MakeTestData(lines, breaks, numTestLines);

    for (size_t k = 0; k < WTF_ARRAY_LENGTH(blockSizes); ++k) {
        size_t lineCount = 0;
        BufferedLineReader reader;
        size_t blockSize = blockSizes[k];
        for (size_t i = 0; i < data.length(); i += blockSize) {
            reader.append(data.substring(i, blockSize));

            String line;
            while (reader.getLine(line)) {
                ASSERT_LT(lineCount, numTestLines);
                ASSERT_EQ(line, lines[lineCount++]);
            }
        }
        ASSERT_EQ(lineCount, numTestLines);
    }
}

TEST(BufferedLineReader, BufferSizesMixedEndings)
{
    const char* lines[] = {
        "aaaaaaaaaaaaaaaa",
        "bbbbbbbbbb",
        "ccccccccccccc",
        "",
        "dddddd",
        "eeeeeeeeee",
        "fffffffffffffffffff"
    };
    const LineBreakType breaks[] = { Cr, Lf, CrLf, Cr, Lf, CrLf, Lf };
    const size_t numTestLines = WTF_ARRAY_LENGTH(lines);
    COMPILE_ASSERT(numTestLines == WTF_ARRAY_LENGTH(breaks), DifferentLengths_lines_and_breaks);
    String data = MakeTestData(lines, breaks, numTestLines);

    for (size_t k = 0; k < WTF_ARRAY_LENGTH(blockSizes); ++k) {
        size_t lineCount = 0;
        BufferedLineReader reader;
        size_t blockSize = blockSizes[k];
        for (size_t i = 0; i < data.length(); i += blockSize) {
            reader.append(data.substring(i, blockSize));

            String line;
            while (reader.getLine(line)) {
                ASSERT_LT(lineCount, numTestLines);
                ASSERT_EQ(line, lines[lineCount++]);
            }
        }
        ASSERT_EQ(lineCount, numTestLines);
    }
}

TEST(BufferedLineReader, BufferBoundaryInCRLF_1)
{
    BufferedLineReader reader;
    reader.append("X\r");
    String line;
    ASSERT_TRUE(reader.getLine(line));
    ASSERT_EQ(line, "X");
    reader.append("\n");
    ASSERT_FALSE(reader.getLine(line));
}

TEST(BufferedLineReader, BufferBoundaryInCRLF_2)
{
    BufferedLineReader reader;
    reader.append("X\r");
    String line;
    ASSERT_TRUE(reader.getLine(line));
    ASSERT_EQ(line, "X");
    ASSERT_FALSE(reader.getLine(line));
    reader.append("\n");
    ASSERT_FALSE(reader.getLine(line));
    reader.append("Y\n");
    ASSERT_TRUE(reader.getLine(line));
    ASSERT_EQ(line, "Y");
}

TEST(BufferedLineReader, NormalizedNUL)
{
    BufferedLineReader reader;
    reader.append(String("X\0Y\n", 4));
    String line;
    ASSERT_TRUE(reader.getLine(line));
    ASSERT_EQ(line[1], WTF::Unicode::replacementCharacter);
}

} // namespace