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TestHashFunctions: Tests to bind hash functionality

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Problem:
- The hash functions have no associated tests, so there is nothing
  binding their behavior.

Solution:
- Bind the hash function behavior by adding tests.
- Use the existing behavior as "correct".
This commit is contained in:
Lenny Maiorani 2020-10-21 09:27:25 -04:00 committed by Andreas Kling
parent 1e86379327
commit 070fc69562
Notes: sideshowbarker 2024-07-19 01:49:34 +09:00 
Author: https://github.com/ldm5180
Commit: https://github.com/SerenityOS/serenity/commit/070fc695628
Pull-request: https://github.com/SerenityOS/serenity/pull/3813
1 changed files with 73 additions and 0 deletions
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AK/Tests/TestHashFunctions.cpp Normal file
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/*
* Copyright (c) 2020, the SerenityOS developers.
* 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.
*
* 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 <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)