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Serenity Operating System
1/*
2 * Copyright (c) 2020, the SerenityOS developers.
3 *
4 * SPDX-License-Identifier: BSD-2-Clause
5 */
6
7#include <LibTest/TestCase.h>
8
9#include <AK/HashFunctions.h>
10#include <AK/Types.h>
11
12TEST_CASE(int_hash)
13{
14 static_assert(int_hash(42) == 3564735745u);
15 static_assert(int_hash(0) == 1177991625u);
16}
17
18TEST_CASE(pair_int_hash)
19{
20 static_assert(pair_int_hash(42, 17) == 339337046u);
21 static_assert(pair_int_hash(0, 0) == 954888656u);
22}
23
24TEST_CASE(u64_hash)
25{
26 static_assert(u64_hash(42) == 2824066580u);
27 static_assert(u64_hash(0) == 954888656u);
28}
29
30TEST_CASE(ptr_hash)
31{
32 // These tests are not static_asserts because the values are
33 // different and the goal is to bind the behavior.
34 if constexpr (sizeof(FlatPtr) == 8) {
35 EXPECT_EQ(ptr_hash(FlatPtr(42)), 2824066580u);
36 EXPECT_EQ(ptr_hash(FlatPtr(0)), 954888656u);
37
38 EXPECT_EQ(ptr_hash(reinterpret_cast<void const*>(42)), 2824066580u);
39 EXPECT_EQ(ptr_hash(reinterpret_cast<void const*>(0)), 954888656u);
40 } else {
41 EXPECT_EQ(ptr_hash(FlatPtr(42)), 3564735745u);
42 EXPECT_EQ(ptr_hash(FlatPtr(0)), 1177991625u);
43
44 EXPECT_EQ(ptr_hash(reinterpret_cast<void const*>(42)), 3564735745u);
45 EXPECT_EQ(ptr_hash(reinterpret_cast<void const*>(0)), 1177991625u);
46 }
47}
48
49TEST_CASE(constexpr_ptr_hash)
50{
51 // This test does not check the result because the goal is just to
52 // ensure the function can be executed in a constexpr context. The
53 // "ptr_hash" test binds the result.
54 static_assert(ptr_hash(FlatPtr(42)));
55}