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 * Copyright (c) 2013, Google Inc. All rights reserved.
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 * modification, are permitted provided that the following conditions are
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 *
 *     * 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
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 * in the documentation and/or other materials provided with the
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 * this software without specific prior written permission.
 *
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 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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 */

#include "config.h"
#include "core/html/TimeRanges.h"

#include "bindings/v8/ExceptionStatePlaceholder.h"
#include <gtest/gtest.h>

#include <sstream>

using WebCore::TimeRanges;

static std::string ToString(const TimeRanges& ranges)
{
    std::stringstream ss;
    ss << "{";
    for (unsigned i = 0; i < ranges.length(); ++i)
        ss << " [" << ranges.start(i, IGNORE_EXCEPTION) << "," << ranges.end(i, IGNORE_EXCEPTION) << ")";
    ss << " }";

    return ss.str();
}

#define ASSERT_RANGE(expected, range) ASSERT_EQ(expected, ToString(*range))

TEST(TimeRanges, Empty)
{
    ASSERT_RANGE("{ }", TimeRanges::create());
}

TEST(TimeRanges, SingleRange)
{
    ASSERT_RANGE("{ [1,2) }", TimeRanges::create(1, 2));
}

TEST(TimeRanges, AddOrder)
{
    RefPtr<TimeRanges> rangeA = TimeRanges::create();
    RefPtr<TimeRanges> rangeB = TimeRanges::create();

    rangeA->add(0, 2);
    rangeA->add(3, 4);
    rangeA->add(5, 100);

    std::string expected = "{ [0,2) [3,4) [5,100) }";
    ASSERT_RANGE(expected, rangeA);

    // Add the values in rangeA to rangeB in reverse order.
    for (int i = rangeA->length() - 1; i >= 0; --i)
        rangeB->add(rangeA->start(i, IGNORE_EXCEPTION), rangeA->end(i, IGNORE_EXCEPTION));

    ASSERT_RANGE(expected, rangeB);
}

TEST(TimeRanges, OverlappingAdds)
{
    RefPtr<TimeRanges> ranges = TimeRanges::create();

    ranges->add(0, 2);
    ranges->add(10, 11);
    ASSERT_RANGE("{ [0,2) [10,11) }", ranges);

    ranges->add(0, 2);
    ASSERT_RANGE("{ [0,2) [10,11) }", ranges);

    ranges->add(2, 3);
    ASSERT_RANGE("{ [0,3) [10,11) }", ranges);

    ranges->add(2, 6);
    ASSERT_RANGE("{ [0,6) [10,11) }", ranges);

    ranges->add(9, 10);
    ASSERT_RANGE("{ [0,6) [9,11) }", ranges);

    ranges->add(8, 10);
    ASSERT_RANGE("{ [0,6) [8,11) }", ranges);

    ranges->add(-1, 7);
    ASSERT_RANGE("{ [-1,7) [8,11) }", ranges);

    ranges->add(6, 9);
    ASSERT_RANGE("{ [-1,11) }", ranges);
}

TEST(TimeRanges, IntersectWith_Self)
{
    RefPtr<TimeRanges> ranges = TimeRanges::create(0, 2);

    ASSERT_RANGE("{ [0,2) }", ranges);

    ranges->intersectWith(ranges.get());

    ASSERT_RANGE("{ [0,2) }", ranges);
}

TEST(TimeRanges, IntersectWith_IdenticalRange)
{
    RefPtr<TimeRanges> rangesA = TimeRanges::create(0, 2);
    RefPtr<TimeRanges> rangesB = rangesA->copy();

    ASSERT_RANGE("{ [0,2) }", rangesA);
    ASSERT_RANGE("{ [0,2) }", rangesB);

    rangesA->intersectWith(rangesB.get());

    ASSERT_RANGE("{ [0,2) }", rangesA);
    ASSERT_RANGE("{ [0,2) }", rangesB);
}

TEST(TimeRanges, IntersectWith_Empty)
{
    RefPtr<TimeRanges> rangesA = TimeRanges::create(0, 2);
    RefPtr<TimeRanges> rangesB = TimeRanges::create();

    ASSERT_RANGE("{ [0,2) }", rangesA);
    ASSERT_RANGE("{ }", rangesB);

    rangesA->intersectWith(rangesB.get());

    ASSERT_RANGE("{ }", rangesA);
    ASSERT_RANGE("{ }", rangesB);
}

TEST(TimeRanges, IntersectWith_DisjointRanges1)
{
    RefPtr<TimeRanges> rangesA = TimeRanges::create();
    RefPtr<TimeRanges> rangesB = TimeRanges::create();

    rangesA->add(0, 1);
    rangesA->add(4, 5);

    rangesB->add(2, 3);
    rangesB->add(6, 7);

    ASSERT_RANGE("{ [0,1) [4,5) }", rangesA);
    ASSERT_RANGE("{ [2,3) [6,7) }", rangesB);

    rangesA->intersectWith(rangesB.get());

    ASSERT_RANGE("{ }", rangesA);
    ASSERT_RANGE("{ [2,3) [6,7) }", rangesB);
}

TEST(TimeRanges, IntersectWith_DisjointRanges2)
{
    RefPtr<TimeRanges> rangesA = TimeRanges::create();
    RefPtr<TimeRanges> rangesB = TimeRanges::create();

    rangesA->add(0, 1);
    rangesA->add(4, 5);

    rangesB->add(1, 4);
    rangesB->add(5, 7);

    ASSERT_RANGE("{ [0,1) [4,5) }", rangesA);
    ASSERT_RANGE("{ [1,4) [5,7) }", rangesB);

    rangesA->intersectWith(rangesB.get());

    ASSERT_RANGE("{ }", rangesA);
    ASSERT_RANGE("{ [1,4) [5,7) }", rangesB);
}

TEST(TimeRanges, IntersectWith_CompleteOverlap1)
{
    RefPtr<TimeRanges> rangesA = TimeRanges::create();
    RefPtr<TimeRanges> rangesB = TimeRanges::create();

    rangesA->add(1, 3);
    rangesA->add(4, 5);
    rangesA->add(6, 9);

    rangesB->add(0, 10);

    ASSERT_RANGE("{ [1,3) [4,5) [6,9) }", rangesA);
    ASSERT_RANGE("{ [0,10) }", rangesB);

    rangesA->intersectWith(rangesB.get());

    ASSERT_RANGE("{ [1,3) [4,5) [6,9) }", rangesA);
    ASSERT_RANGE("{ [0,10) }", rangesB);
}

TEST(TimeRanges, IntersectWith_CompleteOverlap2)
{
    RefPtr<TimeRanges> rangesA = TimeRanges::create();
    RefPtr<TimeRanges> rangesB = TimeRanges::create();

    rangesA->add(1, 3);
    rangesA->add(4, 5);
    rangesA->add(6, 9);

    rangesB->add(1, 9);

    ASSERT_RANGE("{ [1,3) [4,5) [6,9) }", rangesA);
    ASSERT_RANGE("{ [1,9) }", rangesB);

    rangesA->intersectWith(rangesB.get());

    ASSERT_RANGE("{ [1,3) [4,5) [6,9) }", rangesA);
    ASSERT_RANGE("{ [1,9) }", rangesB);
}

TEST(TimeRanges, IntersectWith_Gaps1)
{
    RefPtr<TimeRanges> rangesA = TimeRanges::create();
    RefPtr<TimeRanges> rangesB = TimeRanges::create();

    rangesA->add(0, 2);
    rangesA->add(4, 6);

    rangesB->add(1, 5);

    ASSERT_RANGE("{ [0,2) [4,6) }", rangesA);
    ASSERT_RANGE("{ [1,5) }", rangesB);

    rangesA->intersectWith(rangesB.get());

    ASSERT_RANGE("{ [1,2) [4,5) }", rangesA);
    ASSERT_RANGE("{ [1,5) }", rangesB);
}

TEST(TimeRanges, IntersectWith_Gaps2)
{
    RefPtr<TimeRanges> rangesA = TimeRanges::create();
    RefPtr<TimeRanges> rangesB = TimeRanges::create();

    rangesA->add(0, 2);
    rangesA->add(4, 6);
    rangesA->add(8, 10);

    rangesB->add(1, 9);

    ASSERT_RANGE("{ [0,2) [4,6) [8,10) }", rangesA);
    ASSERT_RANGE("{ [1,9) }", rangesB);

    rangesA->intersectWith(rangesB.get());

    ASSERT_RANGE("{ [1,2) [4,6) [8,9) }", rangesA);
    ASSERT_RANGE("{ [1,9) }", rangesB);
}

TEST(TimeRanges, IntersectWith_Gaps3)
{
    RefPtr<TimeRanges> rangesA = TimeRanges::create();
    RefPtr<TimeRanges> rangesB = TimeRanges::create();

    rangesA->add(0, 2);
    rangesA->add(4, 7);
    rangesA->add(8, 10);

    rangesB->add(1, 5);
    rangesB->add(6, 9);

    ASSERT_RANGE("{ [0,2) [4,7) [8,10) }", rangesA);
    ASSERT_RANGE("{ [1,5) [6,9) }", rangesB);

    rangesA->intersectWith(rangesB.get());

    ASSERT_RANGE("{ [1,2) [4,5) [6,7) [8,9) }", rangesA);
    ASSERT_RANGE("{ [1,5) [6,9) }", rangesB);
}