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author | Android Build Coastguard Worker <android-build-coastguard-worker@google.com> | 2022-05-11 05:09:33 +0000 |
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committer | Android Build Coastguard Worker <android-build-coastguard-worker@google.com> | 2022-05-11 05:09:33 +0000 |
commit | cb03ee7007d7667c27b851bc1b8b3a79f9005fdf (patch) | |
tree | 2ce94d7f0804ccb77d1fa9b2a1bca00eecdff1e2 /third_party/abseil-cpp/absl/base/optimization_test.cc | |
parent | f6aa10304d3f5e80b33f022ada924f2e3d890473 (diff) | |
parent | d3dfe74c4025bacd9741d761815a8cb059e49c68 (diff) | |
download | webrtc-android13-mainline-cellbroadcast-release.tar.gz |
Snap for 8570526 from d3dfe74c4025bacd9741d761815a8cb059e49c68 to mainline-cellbroadcast-releaseaml_cbr_331910000aml_cbr_331810000aml_cbr_331710020aml_cbr_331610010aml_cbr_331510000aml_cbr_331411000aml_cbr_331310010aml_cbr_331111030aml_cbr_331013010aml_cbr_330911010aml_cbr_330810000android13-mainline-cellbroadcast-release
Change-Id: I0dbc2cf28e13bb87bfbbf5da8e389a2e721b1e1e
Diffstat (limited to 'third_party/abseil-cpp/absl/base/optimization_test.cc')
-rw-r--r-- | third_party/abseil-cpp/absl/base/optimization_test.cc | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/third_party/abseil-cpp/absl/base/optimization_test.cc b/third_party/abseil-cpp/absl/base/optimization_test.cc new file mode 100644 index 0000000000..e83369f322 --- /dev/null +++ b/third_party/abseil-cpp/absl/base/optimization_test.cc @@ -0,0 +1,129 @@ +// Copyright 2020 The Abseil 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 +// +// https://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 "absl/base/optimization.h" + +#include "gtest/gtest.h" +#include "absl/types/optional.h" + +namespace { + +// Tests for the ABSL_PREDICT_TRUE and ABSL_PREDICT_FALSE macros. +// The tests only verify that the macros are functionally correct - i.e. code +// behaves as if they weren't used. They don't try to check their impact on +// optimization. + +TEST(PredictTest, PredictTrue) { + EXPECT_TRUE(ABSL_PREDICT_TRUE(true)); + EXPECT_FALSE(ABSL_PREDICT_TRUE(false)); + EXPECT_TRUE(ABSL_PREDICT_TRUE(1 == 1)); + EXPECT_FALSE(ABSL_PREDICT_TRUE(1 == 2)); + + if (ABSL_PREDICT_TRUE(false)) ADD_FAILURE(); + if (!ABSL_PREDICT_TRUE(true)) ADD_FAILURE(); + + EXPECT_TRUE(ABSL_PREDICT_TRUE(true) && true); + EXPECT_TRUE(ABSL_PREDICT_TRUE(true) || false); +} + +TEST(PredictTest, PredictFalse) { + EXPECT_TRUE(ABSL_PREDICT_FALSE(true)); + EXPECT_FALSE(ABSL_PREDICT_FALSE(false)); + EXPECT_TRUE(ABSL_PREDICT_FALSE(1 == 1)); + EXPECT_FALSE(ABSL_PREDICT_FALSE(1 == 2)); + + if (ABSL_PREDICT_FALSE(false)) ADD_FAILURE(); + if (!ABSL_PREDICT_FALSE(true)) ADD_FAILURE(); + + EXPECT_TRUE(ABSL_PREDICT_FALSE(true) && true); + EXPECT_TRUE(ABSL_PREDICT_FALSE(true) || false); +} + +TEST(PredictTest, OneEvaluation) { + // Verify that the expression is only evaluated once. + int x = 0; + if (ABSL_PREDICT_TRUE((++x) == 0)) ADD_FAILURE(); + EXPECT_EQ(x, 1); + if (ABSL_PREDICT_FALSE((++x) == 0)) ADD_FAILURE(); + EXPECT_EQ(x, 2); +} + +TEST(PredictTest, OperatorOrder) { + // Verify that operator order inside and outside the macro behaves well. + // These would fail for a naive '#define ABSL_PREDICT_TRUE(x) x' + EXPECT_TRUE(ABSL_PREDICT_TRUE(1 && 2) == true); + EXPECT_TRUE(ABSL_PREDICT_FALSE(1 && 2) == true); + EXPECT_TRUE(!ABSL_PREDICT_TRUE(1 == 2)); + EXPECT_TRUE(!ABSL_PREDICT_FALSE(1 == 2)); +} + +TEST(PredictTest, Pointer) { + const int x = 3; + const int *good_intptr = &x; + const int *null_intptr = nullptr; + EXPECT_TRUE(ABSL_PREDICT_TRUE(good_intptr)); + EXPECT_FALSE(ABSL_PREDICT_TRUE(null_intptr)); + EXPECT_TRUE(ABSL_PREDICT_FALSE(good_intptr)); + EXPECT_FALSE(ABSL_PREDICT_FALSE(null_intptr)); +} + +TEST(PredictTest, Optional) { + // Note: An optional's truth value is the value's existence, not its truth. + absl::optional<bool> has_value(false); + absl::optional<bool> no_value; + EXPECT_TRUE(ABSL_PREDICT_TRUE(has_value)); + EXPECT_FALSE(ABSL_PREDICT_TRUE(no_value)); + EXPECT_TRUE(ABSL_PREDICT_FALSE(has_value)); + EXPECT_FALSE(ABSL_PREDICT_FALSE(no_value)); +} + +class ImplictlyConvertibleToBool { + public: + explicit ImplictlyConvertibleToBool(bool value) : value_(value) {} + operator bool() const { // NOLINT(google-explicit-constructor) + return value_; + } + + private: + bool value_; +}; + +TEST(PredictTest, ImplicitBoolConversion) { + const ImplictlyConvertibleToBool is_true(true); + const ImplictlyConvertibleToBool is_false(false); + if (!ABSL_PREDICT_TRUE(is_true)) ADD_FAILURE(); + if (ABSL_PREDICT_TRUE(is_false)) ADD_FAILURE(); + if (!ABSL_PREDICT_FALSE(is_true)) ADD_FAILURE(); + if (ABSL_PREDICT_FALSE(is_false)) ADD_FAILURE(); +} + +class ExplictlyConvertibleToBool { + public: + explicit ExplictlyConvertibleToBool(bool value) : value_(value) {} + explicit operator bool() const { return value_; } + + private: + bool value_; +}; + +TEST(PredictTest, ExplicitBoolConversion) { + const ExplictlyConvertibleToBool is_true(true); + const ExplictlyConvertibleToBool is_false(false); + if (!ABSL_PREDICT_TRUE(is_true)) ADD_FAILURE(); + if (ABSL_PREDICT_TRUE(is_false)) ADD_FAILURE(); + if (!ABSL_PREDICT_FALSE(is_true)) ADD_FAILURE(); + if (ABSL_PREDICT_FALSE(is_false)) ADD_FAILURE(); +} + +} // namespace |