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

DEFINITIONS

1. TEST
2. scanSequenceHelper1
3. TEST
4. scanSequenceHelper2
5. TEST
6. lowerCaseAlpha
7. scanWithPredicate
8. TEST
9. scanWithInvPredicate
10. TEST
11. scanRuns
12. TEST
13. scanRunsToStrings
14. TEST
15. tailStringExtract
16. TEST
17. scanDigits1
18. scanDigits2
19. TEST
20. scanFloatValue
21. 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:
 * 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.
 * 3. Neither the name of Opera Software ASA 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 HOLDER 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 "core/html/track/vtt/VTTScanner.h"

#include "wtf/text/WTFString.h"

#include <gtest/gtest.h>

using WebCore::VTTScanner;

namespace {

TEST(VTTScanner, Constructor)
{
    String data8("foo");
    EXPECT_TRUE(data8.is8Bit());
    VTTScanner scanner8(data8);
    EXPECT_FALSE(scanner8.isAtEnd());

    String data16(data8);
    data16.ensure16Bit();
    EXPECT_FALSE(data16.is8Bit());
    VTTScanner scanner16(data16);
    EXPECT_FALSE(scanner16.isAtEnd());

    VTTScanner scannerEmpty(emptyString());
    EXPECT_TRUE(scannerEmpty.isAtEnd());
}

void scanSequenceHelper1(const String& input)
{
    VTTScanner scanner(input);
    EXPECT_FALSE(scanner.isAtEnd());
    EXPECT_TRUE(scanner.match('f'));
    EXPECT_FALSE(scanner.match('o'));

    EXPECT_TRUE(scanner.scan('f'));
    EXPECT_FALSE(scanner.match('f'));
    EXPECT_TRUE(scanner.match('o'));

    EXPECT_FALSE(scanner.scan('e'));
    EXPECT_TRUE(scanner.scan('o'));

    EXPECT_TRUE(scanner.scan('e'));
    EXPECT_FALSE(scanner.match('e'));

    EXPECT_TRUE(scanner.isAtEnd());
}

// Run TESTFUNC with DATA in Latin and then UTF-16. (Requires DATA being Latin.)
#define TEST_WITH(TESTFUNC, DATA) do {      \
    String data8(DATA);                     \
    EXPECT_TRUE(data8.is8Bit());            \
    TESTFUNC(data8);                        \
    \
    String data16(data8);                   \
    data16.ensure16Bit();                   \
    EXPECT_FALSE(data16.is8Bit());          \
    TESTFUNC(data16);                       \
} while (false)


// Exercises match(c) and scan(c).
TEST(VTTScanner, BasicOperations1)
{
    TEST_WITH(scanSequenceHelper1, "foe");
}

void scanSequenceHelper2(const String& input)
{
    VTTScanner scanner(input);
    EXPECT_FALSE(scanner.isAtEnd());
    EXPECT_FALSE(scanner.scan("fe"));

    EXPECT_TRUE(scanner.scan("fo"));
    EXPECT_FALSE(scanner.isAtEnd());

    EXPECT_FALSE(scanner.scan("ee"));

    EXPECT_TRUE(scanner.scan('e'));
    EXPECT_TRUE(scanner.isAtEnd());
}

// Exercises scan(<literal>[, length]).
TEST(VTTScanner, BasicOperations2)
{
    TEST_WITH(scanSequenceHelper2, "foe");
}

bool lowerCaseAlpha(UChar c)
{
    return c >= 'a' && c <= 'z';
}

void scanWithPredicate(const String& input)
{
    VTTScanner scanner(input);
    EXPECT_FALSE(scanner.isAtEnd());
    // Collect "bad".
    VTTScanner::Run lcRun = scanner.collectWhile<lowerCaseAlpha>();
    // collectWhile doesn't move the scan position.
    EXPECT_TRUE(scanner.match('b'));
    // Consume "bad".
    scanner.skipWhile<lowerCaseAlpha>();
    EXPECT_TRUE(scanner.match('A'));
    EXPECT_TRUE(scanner.isAt(lcRun.end()));

    // Consume "A".
    EXPECT_TRUE(scanner.scan('A'));

    // Collect "bing".
    lcRun = scanner.collectWhile<lowerCaseAlpha>();
    // collectWhile doesn't move the scan position.
    EXPECT_FALSE(scanner.isAtEnd());
    // Consume "bing".
    scanner.skipWhile<lowerCaseAlpha>();
    EXPECT_TRUE(scanner.isAt(lcRun.end()));
    EXPECT_TRUE(scanner.isAtEnd());
}

// Tests skipWhile() and collectWhile().
TEST(VTTScanner, PredicateScanning)
{
    TEST_WITH(scanWithPredicate, "badAbing");
}

void scanWithInvPredicate(const String& input)
{
    VTTScanner scanner(input);
    EXPECT_FALSE(scanner.isAtEnd());
    // Collect "BAD".
    VTTScanner::Run ucRun = scanner.collectUntil<lowerCaseAlpha>();
    // collectUntil doesn't move the scan position.
    EXPECT_TRUE(scanner.match('B'));
    // Consume "BAD".
    scanner.skipUntil<lowerCaseAlpha>();
    EXPECT_TRUE(scanner.match('a'));
    EXPECT_TRUE(scanner.isAt(ucRun.end()));

    // Consume "a".
    EXPECT_TRUE(scanner.scan('a'));

    // Collect "BING".
    ucRun = scanner.collectUntil<lowerCaseAlpha>();
    // collectUntil doesn't move the scan position.
    EXPECT_FALSE(scanner.isAtEnd());
    // Consume "BING".
    scanner.skipUntil<lowerCaseAlpha>();
    EXPECT_TRUE(scanner.isAt(ucRun.end()));
    EXPECT_TRUE(scanner.isAtEnd());
}

// Tests skipUntil() and collectUntil().
TEST(VTTScanner, InversePredicateScanning)
{
    TEST_WITH(scanWithInvPredicate, "BADaBING");
}

void scanRuns(const String& input)
{
    String fooString("foo");
    String barString("bar");
    VTTScanner scanner(input);
    EXPECT_FALSE(scanner.isAtEnd());
    VTTScanner::Run word = scanner.collectWhile<lowerCaseAlpha>();
    EXPECT_FALSE(scanner.scanRun(word, barString));
    EXPECT_TRUE(scanner.scanRun(word, fooString));

    EXPECT_TRUE(scanner.match(':'));
    EXPECT_TRUE(scanner.scan(':'));

    // Skip 'baz'.
    scanner.skipRun(scanner.collectWhile<lowerCaseAlpha>());

    EXPECT_TRUE(scanner.match(':'));
    EXPECT_TRUE(scanner.scan(':'));

    word = scanner.collectWhile<lowerCaseAlpha>();
    EXPECT_FALSE(scanner.scanRun(word, fooString));
    EXPECT_TRUE(scanner.scanRun(word, barString));
    EXPECT_TRUE(scanner.isAtEnd());
}

// Tests scanRun/skipRun.
TEST(VTTScanner, RunScanning)
{
    TEST_WITH(scanRuns, "foo:baz:bar");
}

void scanRunsToStrings(const String& input)
{
    VTTScanner scanner(input);
    EXPECT_FALSE(scanner.isAtEnd());
    VTTScanner::Run word = scanner.collectWhile<lowerCaseAlpha>();
    String fooString = scanner.extractString(word);
    EXPECT_EQ(fooString, "foo");
    EXPECT_TRUE(scanner.isAt(word.end()));

    EXPECT_TRUE(scanner.match(':'));
    EXPECT_TRUE(scanner.scan(':'));

    word = scanner.collectWhile<lowerCaseAlpha>();
    String barString = scanner.extractString(word);
    EXPECT_EQ(barString, "bar");
    EXPECT_TRUE(scanner.isAt(word.end()));
    EXPECT_TRUE(scanner.isAtEnd());
}

// Tests extractString.
TEST(VTTScanner, ExtractString)
{
    TEST_WITH(scanRunsToStrings, "foo:bar");
}

void tailStringExtract(const String& input)
{
    VTTScanner scanner(input);
    EXPECT_TRUE(scanner.scan("foo"));
    EXPECT_TRUE(scanner.scan(':'));
    String barSuffix = scanner.restOfInputAsString();
    EXPECT_EQ(barSuffix, "bar");

    EXPECT_TRUE(scanner.isAtEnd());
}

// Tests restOfInputAsString().
TEST(VTTScanner, ExtractRestAsString)
{
    TEST_WITH(tailStringExtract, "foo:bar");
}

void scanDigits1(const String& input)
{
    VTTScanner scanner(input);
    EXPECT_TRUE(scanner.scan("foo"));
    int number;
    EXPECT_EQ(scanner.scanDigits(number), 0u);
    EXPECT_EQ(number, 0);
    EXPECT_TRUE(scanner.scan(' '));
    EXPECT_EQ(scanner.scanDigits(number), 3u);
    EXPECT_TRUE(scanner.match(' '));
    EXPECT_EQ(number, 123);

    EXPECT_TRUE(scanner.scan(' '));
    EXPECT_TRUE(scanner.scan("bar"));
    EXPECT_TRUE(scanner.scan(' '));

    EXPECT_EQ(scanner.scanDigits(number), 5u);
    EXPECT_EQ(number, 45678);

    EXPECT_TRUE(scanner.isAtEnd());
}

void scanDigits2(const String& input)
{
    VTTScanner scanner(input);
    int number;
    EXPECT_EQ(scanner.scanDigits(number), 0u);
    EXPECT_EQ(number, 0);
    EXPECT_TRUE(scanner.scan('-'));
    EXPECT_EQ(scanner.scanDigits(number), 3u);
    EXPECT_EQ(number, 654);

    EXPECT_TRUE(scanner.scan(' '));

    EXPECT_EQ(scanner.scanDigits(number), 19u);
    EXPECT_EQ(number, std::numeric_limits<int>::max());

    EXPECT_TRUE(scanner.isAtEnd());
}

// Tests scanDigits().
TEST(VTTScanner, ScanDigits)
{
    TEST_WITH(scanDigits1, "foo 123 bar 45678");
    TEST_WITH(scanDigits2, "-654 1000000000000000000");
}

void scanFloatValue(const String& input)
{
    VTTScanner scanner(input);
    float value;
    // "1."
    EXPECT_TRUE(scanner.scanFloat(value));
    EXPECT_EQ(value, 1.0f);
    EXPECT_TRUE(scanner.scan(' '));

    // "1.0"
    EXPECT_TRUE(scanner.scanFloat(value));
    EXPECT_EQ(value, 1.0f);
    EXPECT_TRUE(scanner.scan(' '));

    // ".0"
    EXPECT_TRUE(scanner.scanFloat(value));
    EXPECT_EQ(value, 0.0f);
    EXPECT_TRUE(scanner.scan(' '));

    // "." (invalid)
    EXPECT_FALSE(scanner.scanFloat(value));
    EXPECT_TRUE(scanner.match('.'));
    EXPECT_TRUE(scanner.scan('.'));
    EXPECT_TRUE(scanner.scan(' '));

    // "1.0000"
    EXPECT_TRUE(scanner.scanFloat(value));
    EXPECT_EQ(value, 1.0f);
    EXPECT_TRUE(scanner.scan(' '));

    // "01.000"
    EXPECT_TRUE(scanner.scanFloat(value));
    EXPECT_EQ(value, 1.0f);

    EXPECT_TRUE(scanner.isAtEnd());
}

// Tests scanFloat().
TEST(VTTScanner, ScanFloat)
{
    TEST_WITH(scanFloatValue, "1. 1.0 .0 . 1.0000 01.000");
}

#undef TEST_WITH

} // namespace