| //===-- sanitizer_hash_test.cpp -------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file is a part of Sanitizers. |
| // |
| //===----------------------------------------------------------------------===// |
| #include "sanitizer_common/sanitizer_hash.h" |
| |
| #include "gtest/gtest.h" |
| |
| namespace __sanitizer { |
| |
| // Tests matche a few hashes generated by https://github.com/aappleby/smhasher. |
| |
| TEST(SanitizerCommon, Hash32Seed) { |
| EXPECT_EQ(MurMur2HashBuilder(0).get(), 275646681u); |
| EXPECT_EQ(MurMur2HashBuilder(1).get(), 3030210376u); |
| EXPECT_EQ(MurMur2HashBuilder(3).get(), 1816185114u); |
| } |
| |
| TEST(SanitizerCommon, Hash32Add) { |
| MurMur2HashBuilder h(123 * sizeof(u32)); |
| for (u32 i = 0; i < 123; ++i) h.add(i); |
| EXPECT_EQ(h.get(), 351963665u); |
| for (u32 i = 0; i < 123; ++i) h.add(-i); |
| EXPECT_EQ(h.get(), 2640061027u); |
| } |
| |
| TEST(SanitizerCommon, Hash64Seed) { |
| EXPECT_EQ(MurMur2Hash64Builder(0).get(), 4469829599815726255ull); |
| EXPECT_EQ(MurMur2Hash64Builder(1).get(), 14121968454562043709ull); |
| EXPECT_EQ(MurMur2Hash64Builder(3).get(), 8040757559320203998ull); |
| } |
| |
| TEST(SanitizerCommon, Hash64Add) { |
| MurMur2Hash64Builder h(123 * sizeof(u64)); |
| for (u32 i = 0; i < 123; ++i) h.add(i); |
| EXPECT_EQ(h.get(), 11366430808886012537ull); |
| for (u32 i = 0; i < 123; ++i) h.add(-i); |
| EXPECT_EQ(h.get(), 10843188204560467446ull); |
| } |
| |
| } // namespace __sanitizer |