// Copyright 2023 The Dawn & Tint Authors
//
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// 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.
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// 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.
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// 3. Neither the name of the copyright holder 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
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// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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#include "dawn/common/Numeric.h"
#include "gtest/gtest.h"

namespace dawn {
namespace {

// Tests for RangesOverlap
TEST(Numeric, angesOverlap) {
    // Range contains only one number
    ASSERT_EQ(true, RangesOverlap(0, 0, 0, 0));
    ASSERT_EQ(false, RangesOverlap(0, 0, 1, 1));

    // [  ]
    //      [  ]
    ASSERT_EQ(false, RangesOverlap(0, 8, 9, 16));

    //      [  ]
    // [  ]
    ASSERT_EQ(false, RangesOverlap(9, 16, 0, 8));

    //      [  ]
    // [             ]
    ASSERT_EQ(true, RangesOverlap(2, 3, 0, 8));

    // [             ]
    //      [  ]
    ASSERT_EQ(true, RangesOverlap(0, 8, 2, 3));

    // [   ]
    //   [   ]
    ASSERT_EQ(true, RangesOverlap(0, 8, 4, 12));

    //   [   ]
    // [   ]
    ASSERT_EQ(true, RangesOverlap(4, 12, 0, 8));

    // [   ]
    //     [   ]
    ASSERT_EQ(true, RangesOverlap(0, 8, 8, 12));

    //     [   ]
    // [   ]
    ASSERT_EQ(true, RangesOverlap(8, 12, 0, 8));

    // Negative numbers
    ASSERT_EQ(true, RangesOverlap(-9, 12, 4, 16));
    ASSERT_EQ(false, RangesOverlap(-9, -3, -2, 0));
}

}  // anonymous namespace
}  // namespace dawn