ladybird/AK/Tests/TestHashFunctions.cpp

/*
 * Copyright (c) 2020, the SerenityOS developers.
 * All rights reserved.
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 * 2. Redistributions in binary form must reproduce the above copyright notice,
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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#include <AK/TestSuite.h>

#include <AK/HashFunctions.h>
#include <AK/Types.h>

TEST_CASE(int_hash)
{
    EXPECT_EQ(int_hash(42), 3564735745u);
    EXPECT_EQ(int_hash(0), 1177991625u);
}

TEST_CASE(double_hash)
{
    EXPECT_EQ(double_hash(42), 524450u);
    EXPECT_EQ(double_hash(0), 12384u);
}

TEST_CASE(pair_int_hash)
{
    EXPECT_EQ(pair_int_hash(42, 17), 339337046u);
    EXPECT_EQ(pair_int_hash(0, 0), 954888656u);
}

TEST_CASE(u64_hash)
{
    EXPECT_EQ(u64_hash(42), 2824066580u);
    EXPECT_EQ(u64_hash(0), 954888656u);
}

TEST_CASE(ptr_hash)
{
    if constexpr (sizeof(FlatPtr) == 8) {
        EXPECT_EQ(ptr_hash(FlatPtr(42)), 2824066580u);
        EXPECT_EQ(ptr_hash(FlatPtr(0)), 954888656u);

        EXPECT_EQ(ptr_hash(reinterpret_cast<const void*>(42)), 2824066580u);
        EXPECT_EQ(ptr_hash(reinterpret_cast<const void*>(0)), 954888656u);
    } else {
        EXPECT_EQ(ptr_hash(FlatPtr(42)), 3564735745u);
        EXPECT_EQ(ptr_hash(FlatPtr(0)), 1177991625u);

        EXPECT_EQ(ptr_hash(reinterpret_cast<const void*>(42)), 3564735745u);
        EXPECT_EQ(ptr_hash(reinterpret_cast<const void*>(0)), 1177991625u);
    }
}

TEST_MAIN(HashFunctions)