| /* |
| * |
| * Copyright 2015 gRPC authors. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * |
| */ |
| |
| #include <grpc/impl/codegen/port_platform.h> |
| |
| #include "src/core/lib/gpr/useful.h" |
| |
| #include <gtest/gtest.h> |
| |
| namespace grpc_core { |
| |
| TEST(UsefulTest, ClampWorks) { |
| EXPECT_EQ(Clamp(1, 0, 2), 1); |
| EXPECT_EQ(Clamp(0, 0, 2), 0); |
| EXPECT_EQ(Clamp(2, 0, 2), 2); |
| EXPECT_EQ(Clamp(-1, 0, 2), 0); |
| EXPECT_EQ(Clamp(3, 0, 2), 2); |
| } |
| |
| TEST(UsefulTest, Rotate) { |
| EXPECT_EQ(RotateLeft(0x80000001u, 1u), 3); |
| EXPECT_EQ(RotateRight(0x80000001u, 1u), 0xc0000000); |
| } |
| |
| TEST(UsefulTest, ArraySize) { |
| int four[4]; |
| int five[5]; |
| |
| EXPECT_EQ(GPR_ARRAY_SIZE(four), 4); |
| EXPECT_EQ(GPR_ARRAY_SIZE(five), 5); |
| } |
| |
| TEST(UsefulTest, BitOps) { |
| uint32_t bitset = 0; |
| |
| EXPECT_EQ(BitCount((1u << 31) - 1), 31); |
| EXPECT_EQ(BitCount(1u << 3), 1); |
| EXPECT_EQ(BitCount(0), 0); |
| EXPECT_EQ(SetBit(&bitset, 3), 8); |
| EXPECT_EQ(BitCount(bitset), 1); |
| EXPECT_EQ(GetBit(bitset, 3), 1); |
| EXPECT_EQ(SetBit(&bitset, 1), 10); |
| EXPECT_EQ(BitCount(bitset), 2); |
| EXPECT_EQ(ClearBit(&bitset, 3), 2); |
| EXPECT_EQ(BitCount(bitset), 1); |
| EXPECT_EQ(GetBit(bitset, 3), 0); |
| EXPECT_EQ(BitCount(std::numeric_limits<uint64_t>::max()), 64); |
| } |
| |
| TEST(UsefulTest, SaturatingAdd) { |
| EXPECT_EQ(SaturatingAdd(0, 0), 0); |
| EXPECT_EQ(SaturatingAdd(0, 1), 1); |
| EXPECT_EQ(SaturatingAdd(1, 0), 1); |
| EXPECT_EQ(SaturatingAdd(1, 1), 2); |
| EXPECT_EQ(SaturatingAdd(std::numeric_limits<int64_t>::max(), 1), |
| std::numeric_limits<int64_t>::max()); |
| EXPECT_EQ(SaturatingAdd(std::numeric_limits<int64_t>::max(), |
| std::numeric_limits<int64_t>::max()), |
| std::numeric_limits<int64_t>::max()); |
| EXPECT_EQ(SaturatingAdd(std::numeric_limits<int64_t>::min(), -1), |
| std::numeric_limits<int64_t>::min()); |
| } |
| |
| } // namespace grpc_core |
| |
| int main(int argc, char** argv) { |
| ::testing::InitGoogleTest(&argc, argv); |
| return RUN_ALL_TESTS(); |
| } |