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// Copyright 2021 Google LLC
// SPDX-License-Identifier: Apache-2.0
//
// 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.
#ifndef HWY_TESTS_HWY_GTEST_H_
#define HWY_TESTS_HWY_GTEST_H_
// Adapters for GUnit to run tests for all targets.
#include <stddef.h>
#include <stdint.h>
#include <string>
#include <tuple>
#include "gtest/gtest.h"
#include "hwy/highway.h"
namespace hwy {
// googletest before 1.10 didn't define INSTANTIATE_TEST_SUITE_P() but instead
// used INSTANTIATE_TEST_CASE_P which is now deprecated.
#ifdef INSTANTIATE_TEST_SUITE_P
#define HWY_GTEST_INSTANTIATE_TEST_SUITE_P INSTANTIATE_TEST_SUITE_P
#else
#define HWY_GTEST_INSTANTIATE_TEST_SUITE_P INSTANTIATE_TEST_CASE_P
#endif
// Helper class to run parametric tests using the hwy target as parameter. To
// use this define the following in your test:
// class MyTestSuite : public TestWithParamTarget {
// ...
// };
// HWY_TARGET_INSTANTIATE_TEST_SUITE_P(MyTestSuite);
// TEST_P(MyTestSuite, MyTest) { ... }
class TestWithParamTarget : public testing::TestWithParam<int64_t> {
protected:
void SetUp() override { SetSupportedTargetsForTest(GetParam()); }
void TearDown() override {
// Check that the parametric test calls SupportedTargets() when the source
// was compiled with more than one target. In the single-target case only
// static dispatch will be used anyway.
#if (HWY_TARGETS & (HWY_TARGETS - 1)) != 0
EXPECT_TRUE(GetChosenTarget().IsInitialized())
<< "This hwy target parametric test doesn't use dynamic-dispatch and "
"doesn't need to be parametric.";
#endif
SetSupportedTargetsForTest(0);
}
};
// Function to convert the test parameter of a TestWithParamTarget for
// displaying it in the gtest test name.
static inline std::string TestParamTargetName(
const testing::TestParamInfo<int64_t>& info) {
return TargetName(info.param);
}
#define HWY_TARGET_INSTANTIATE_TEST_SUITE_P(suite) \
HWY_GTEST_INSTANTIATE_TEST_SUITE_P( \
suite##Group, suite, \
testing::ValuesIn(::hwy::SupportedAndGeneratedTargets()), \
::hwy::TestParamTargetName)
// Helper class similar to TestWithParamTarget to run parametric tests that
// depend on the target and another parametric test. If you need to use multiple
// extra parameters use a std::tuple<> of them and ::testing::Generate(...) as
// the generator. To use this class define the following in your test:
// class MyTestSuite : public TestWithParamTargetT<int> {
// ...
// };
// HWY_TARGET_INSTANTIATE_TEST_SUITE_P_T(MyTestSuite, ::testing::Range(0, 9));
// TEST_P(MyTestSuite, MyTest) { ... GetParam() .... }
template <typename T>
class TestWithParamTargetAndT
: public ::testing::TestWithParam<std::tuple<int64_t, T>> {
public:
// Expose the parametric type here so it can be used by the
// HWY_TARGET_INSTANTIATE_TEST_SUITE_P_T macro.
using HwyParamType = T;
protected:
void SetUp() override {
SetSupportedTargetsForTest(std::get<0>(
::testing::TestWithParam<std::tuple<int64_t, T>>::GetParam()));
}
void TearDown() override {
// Check that the parametric test calls SupportedTargets() when the source
// was compiled with more than one target. In the single-target case only
// static dispatch will be used anyway.
#if (HWY_TARGETS & (HWY_TARGETS - 1)) != 0
EXPECT_TRUE(GetChosenTarget().IsInitialized())
<< "This hwy target parametric test doesn't use dynamic-dispatch and "
"doesn't need to be parametric.";
#endif
SetSupportedTargetsForTest(0);
}
T GetParam() {
return std::get<1>(
::testing::TestWithParam<std::tuple<int64_t, T>>::GetParam());
}
};
template <typename T>
std::string TestParamTargetNameAndT(
const testing::TestParamInfo<std::tuple<int64_t, T>>& info) {
return std::string(TargetName(std::get<0>(info.param))) + "_" +
::testing::PrintToString(std::get<1>(info.param));
}
#define HWY_TARGET_INSTANTIATE_TEST_SUITE_P_T(suite, generator) \
HWY_GTEST_INSTANTIATE_TEST_SUITE_P( \
suite##Group, suite, \
::testing::Combine( \
testing::ValuesIn(::hwy::SupportedAndGeneratedTargets()), \
generator), \
::hwy::TestParamTargetNameAndT<suite::HwyParamType>)
// Helper macro to export a function and define a test that tests it. This is
// equivalent to do a HWY_EXPORT of a void(void) function and run it in a test:
// class MyTestSuite : public TestWithParamTarget {
// ...
// };
// HWY_TARGET_INSTANTIATE_TEST_SUITE_P(MyTestSuite);
// HWY_EXPORT_AND_TEST_P(MyTestSuite, MyTest);
#define HWY_EXPORT_AND_TEST_P(suite, func_name) \
HWY_EXPORT(func_name); \
TEST_P(suite, func_name) { HWY_DYNAMIC_DISPATCH(func_name)(); } \
static_assert(true, "For requiring trailing semicolon")
#define HWY_EXPORT_AND_TEST_P_T(suite, func_name) \
HWY_EXPORT(func_name); \
TEST_P(suite, func_name) { HWY_DYNAMIC_DISPATCH(func_name)(GetParam()); } \
static_assert(true, "For requiring trailing semicolon")
#define HWY_BEFORE_TEST(suite) \
class suite : public hwy::TestWithParamTarget {}; \
HWY_TARGET_INSTANTIATE_TEST_SUITE_P(suite); \
static_assert(true, "For requiring trailing semicolon")
} // namespace hwy
#endif // HWY_TESTS_HWY_GTEST_H_
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