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4ef574064e75b86f115549e9eb4c7e806781b3ab Export of internal Abseil changes by Abseil Team GitOrigin-RevId: 0033c9ea91a52ade7c6b725aa2ef3cbe15463421 Change-Id: I8a2b70063cb3ab40c6943a6db0fe40cae71ed8d7 --- absl/random/mocking_bit_gen_test.cc | 347 ++++++++++++++++++++++++++++++++++++ 1 file changed, 347 insertions(+) create mode 100644 absl/random/mocking_bit_gen_test.cc (limited to 'absl/random/mocking_bit_gen_test.cc') diff --git a/absl/random/mocking_bit_gen_test.cc b/absl/random/mocking_bit_gen_test.cc new file mode 100644 index 00000000..f0ffc9ac --- /dev/null +++ b/absl/random/mocking_bit_gen_test.cc @@ -0,0 +1,347 @@ +// +// Copyright 2018 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/random/mocking_bit_gen.h" + +#include +#include + +#include "gmock/gmock.h" +#include "gtest/gtest-spi.h" +#include "gtest/gtest.h" +#include "absl/random/bit_gen_ref.h" +#include "absl/random/mock_distributions.h" +#include "absl/random/random.h" + +namespace { +using ::testing::Ne; +using ::testing::Return; + +TEST(BasicMocking, AllDistributionsAreOverridable) { + absl::MockingBitGen gen; + + EXPECT_NE(absl::Uniform(gen, 1, 1000000), 20); + EXPECT_CALL(absl::MockUniform(), Call(gen, 1, 1000000)) + .WillOnce(Return(20)); + EXPECT_EQ(absl::Uniform(gen, 1, 1000000), 20); + + EXPECT_NE(absl::Uniform(gen, 0.0, 100.0), 5.0); + EXPECT_CALL(absl::MockUniform(), Call(gen, 0.0, 100.0)) + .WillOnce(Return(5.0)); + EXPECT_EQ(absl::Uniform(gen, 0.0, 100.0), 5.0); + + EXPECT_NE(absl::Exponential(gen, 1.0), 42); + EXPECT_CALL(absl::MockExponential(), Call(gen, 1.0)) + .WillOnce(Return(42)); + EXPECT_EQ(absl::Exponential(gen, 1.0), 42); + + EXPECT_NE(absl::Poisson(gen, 1.0), 500); + EXPECT_CALL(absl::MockPoisson(), Call(gen, 1.0)).WillOnce(Return(500)); + EXPECT_EQ(absl::Poisson(gen, 1.0), 500); + + EXPECT_NE(absl::Bernoulli(gen, 0.000001), true); + EXPECT_CALL(absl::MockBernoulli(), Call(gen, 0.000001)) + .WillOnce(Return(true)); + EXPECT_EQ(absl::Bernoulli(gen, 0.000001), true); + + EXPECT_NE(absl::Zipf(gen, 1000000, 2.0, 1.0), 1221); + EXPECT_CALL(absl::MockZipf(), Call(gen, 1000000, 2.0, 1.0)) + .WillOnce(Return(1221)); + EXPECT_EQ(absl::Zipf(gen, 1000000, 2.0, 1.0), 1221); + + EXPECT_NE(absl::Gaussian(gen, 0.0, 1.0), 0.001); + EXPECT_CALL(absl::MockGaussian(), Call(gen, 0.0, 1.0)) + .WillOnce(Return(0.001)); + EXPECT_EQ(absl::Gaussian(gen, 0.0, 1.0), 0.001); + + EXPECT_NE(absl::LogUniform(gen, 0, 1000000, 2), 500000); + EXPECT_CALL(absl::MockLogUniform(), Call(gen, 0, 1000000, 2)) + .WillOnce(Return(500000)); + EXPECT_EQ(absl::LogUniform(gen, 0, 1000000, 2), 500000); +} + +TEST(BasicMocking, OnDistribution) { + absl::MockingBitGen gen; + + EXPECT_NE(absl::Uniform(gen, 1, 1000000), 20); + ON_CALL(absl::MockUniform(), Call(gen, 1, 1000000)) + .WillByDefault(Return(20)); + EXPECT_EQ(absl::Uniform(gen, 1, 1000000), 20); + + EXPECT_NE(absl::Uniform(gen, 0.0, 100.0), 5.0); + ON_CALL(absl::MockUniform(), Call(gen, 0.0, 100.0)) + .WillByDefault(Return(5.0)); + EXPECT_EQ(absl::Uniform(gen, 0.0, 100.0), 5.0); + + EXPECT_NE(absl::Exponential(gen, 1.0), 42); + ON_CALL(absl::MockExponential(), Call(gen, 1.0)) + .WillByDefault(Return(42)); + EXPECT_EQ(absl::Exponential(gen, 1.0), 42); + + EXPECT_NE(absl::Poisson(gen, 1.0), 500); + ON_CALL(absl::MockPoisson(), Call(gen, 1.0)).WillByDefault(Return(500)); + EXPECT_EQ(absl::Poisson(gen, 1.0), 500); + + EXPECT_NE(absl::Bernoulli(gen, 0.000001), true); + ON_CALL(absl::MockBernoulli(), Call(gen, 0.000001)) + .WillByDefault(Return(true)); + EXPECT_EQ(absl::Bernoulli(gen, 0.000001), true); + + EXPECT_NE(absl::Zipf(gen, 1000000, 2.0, 1.0), 1221); + ON_CALL(absl::MockZipf(), Call(gen, 1000000, 2.0, 1.0)) + .WillByDefault(Return(1221)); + EXPECT_EQ(absl::Zipf(gen, 1000000, 2.0, 1.0), 1221); + + EXPECT_NE(absl::Gaussian(gen, 0.0, 1.0), 0.001); + ON_CALL(absl::MockGaussian(), Call(gen, 0.0, 1.0)) + .WillByDefault(Return(0.001)); + EXPECT_EQ(absl::Gaussian(gen, 0.0, 1.0), 0.001); + + EXPECT_NE(absl::LogUniform(gen, 0, 1000000, 2), 2040); + ON_CALL(absl::MockLogUniform(), Call(gen, 0, 1000000, 2)) + .WillByDefault(Return(2040)); + EXPECT_EQ(absl::LogUniform(gen, 0, 1000000, 2), 2040); +} + +TEST(BasicMocking, GMockMatchers) { + absl::MockingBitGen gen; + + EXPECT_NE(absl::Zipf(gen, 1000000, 2.0, 1.0), 1221); + ON_CALL(absl::MockZipf(), Call(gen, 1000000, 2.0, 1.0)) + .WillByDefault(Return(1221)); + EXPECT_EQ(absl::Zipf(gen, 1000000, 2.0, 1.0), 1221); +} + +TEST(BasicMocking, OverridesWithMultipleGMockExpectations) { + absl::MockingBitGen gen; + + EXPECT_CALL(absl::MockUniform(), Call(gen, 1, 10000)) + .WillOnce(Return(20)) + .WillOnce(Return(40)) + .WillOnce(Return(60)); + EXPECT_EQ(absl::Uniform(gen, 1, 10000), 20); + EXPECT_EQ(absl::Uniform(gen, 1, 10000), 40); + EXPECT_EQ(absl::Uniform(gen, 1, 10000), 60); +} + +TEST(BasicMocking, DefaultArgument) { + absl::MockingBitGen gen; + + ON_CALL(absl::MockExponential(), Call(gen, 1.0)) + .WillByDefault(Return(200)); + + EXPECT_EQ(absl::Exponential(gen), 200); + EXPECT_EQ(absl::Exponential(gen, 1.0), 200); +} + +TEST(BasicMocking, MultipleGenerators) { + auto get_value = [](absl::BitGenRef gen_ref) { + return absl::Uniform(gen_ref, 1, 1000000); + }; + absl::MockingBitGen unmocked_generator; + absl::MockingBitGen mocked_with_3; + absl::MockingBitGen mocked_with_11; + + EXPECT_CALL(absl::MockUniform(), Call(mocked_with_3, 1, 1000000)) + .WillOnce(Return(3)) + .WillRepeatedly(Return(17)); + EXPECT_CALL(absl::MockUniform(), Call(mocked_with_11, 1, 1000000)) + .WillOnce(Return(11)) + .WillRepeatedly(Return(17)); + + // Ensure that unmocked generator generates neither value. + int unmocked_value = get_value(unmocked_generator); + EXPECT_NE(unmocked_value, 3); + EXPECT_NE(unmocked_value, 11); + // Mocked generators should generate their mocked values. + EXPECT_EQ(get_value(mocked_with_3), 3); + EXPECT_EQ(get_value(mocked_with_11), 11); + // Ensure that the mocks have expired. + EXPECT_NE(get_value(mocked_with_3), 3); + EXPECT_NE(get_value(mocked_with_11), 11); +} + +TEST(BasicMocking, MocksNotTrigeredForIncorrectTypes) { + absl::MockingBitGen gen; + EXPECT_CALL(absl::MockUniform(), Call(gen)).WillOnce(Return(42)); + + EXPECT_NE(absl::Uniform(gen), 42); // Not mocked + EXPECT_EQ(absl::Uniform(gen), 42); // Mock triggered +} + +TEST(BasicMocking, FailsOnUnsatisfiedMocks) { + EXPECT_NONFATAL_FAILURE( + []() { + absl::MockingBitGen gen; + EXPECT_CALL(absl::MockExponential(), Call(gen, 1.0)) + .WillOnce(Return(3.0)); + // Does not call absl::Exponential(). + }(), + "unsatisfied and active"); +} + +TEST(OnUniform, RespectsUniformIntervalSemantics) { + absl::MockingBitGen gen; + + EXPECT_CALL(absl::MockUniform(), + Call(absl::IntervalClosed, gen, 1, 1000000)) + .WillOnce(Return(301)); + EXPECT_NE(absl::Uniform(gen, 1, 1000000), 301); // Not mocked + EXPECT_EQ(absl::Uniform(absl::IntervalClosed, gen, 1, 1000000), 301); +} + +TEST(OnUniform, RespectsNoArgUnsignedShorthand) { + absl::MockingBitGen gen; + EXPECT_CALL(absl::MockUniform(), Call(gen)).WillOnce(Return(42)); + EXPECT_EQ(absl::Uniform(gen), 42); +} + +TEST(RepeatedlyModifier, ForceSnakeEyesForManyDice) { + auto roll_some_dice = [](absl::BitGenRef gen_ref) { + std::vector results(16); + for (auto& r : results) { + r = absl::Uniform(absl::IntervalClosed, gen_ref, 1, 6); + } + return results; + }; + std::vector results; + absl::MockingBitGen gen; + + // Without any mocked calls, not all dice roll a "6". + results = roll_some_dice(gen); + EXPECT_LT(std::accumulate(std::begin(results), std::end(results), 0), + results.size() * 6); + + // Verify that we can force all "6"-rolls, with mocking. + ON_CALL(absl::MockUniform(), Call(absl::IntervalClosed, gen, 1, 6)) + .WillByDefault(Return(6)); + results = roll_some_dice(gen); + EXPECT_EQ(std::accumulate(std::begin(results), std::end(results), 0), + results.size() * 6); +} + +TEST(WillOnce, DistinctCounters) { + absl::MockingBitGen gen; + EXPECT_CALL(absl::MockUniform(), Call(gen, 1, 1000000)) + .Times(3) + .WillRepeatedly(Return(0)); + EXPECT_CALL(absl::MockUniform(), Call(gen, 1000001, 2000000)) + .Times(3) + .WillRepeatedly(Return(1)); + EXPECT_EQ(absl::Uniform(gen, 1000001, 2000000), 1); + EXPECT_EQ(absl::Uniform(gen, 1, 1000000), 0); + EXPECT_EQ(absl::Uniform(gen, 1000001, 2000000), 1); + EXPECT_EQ(absl::Uniform(gen, 1, 1000000), 0); + EXPECT_EQ(absl::Uniform(gen, 1000001, 2000000), 1); + EXPECT_EQ(absl::Uniform(gen, 1, 1000000), 0); +} + +TEST(TimesModifier, ModifierSaturatesAndExpires) { + EXPECT_NONFATAL_FAILURE( + []() { + absl::MockingBitGen gen; + EXPECT_CALL(absl::MockUniform(), Call(gen, 1, 1000000)) + .Times(3) + .WillRepeatedly(Return(15)) + .RetiresOnSaturation(); + + EXPECT_EQ(absl::Uniform(gen, 1, 1000000), 15); + EXPECT_EQ(absl::Uniform(gen, 1, 1000000), 15); + EXPECT_EQ(absl::Uniform(gen, 1, 1000000), 15); + // Times(3) has expired - Should get a different value now. + + EXPECT_NE(absl::Uniform(gen, 1, 1000000), 15); + }(), + ""); +} + +TEST(TimesModifier, Times0) { + absl::MockingBitGen gen; + EXPECT_CALL(absl::MockBernoulli(), Call(gen, 0.0)).Times(0); + EXPECT_CALL(absl::MockPoisson(), Call(gen, 1.0)).Times(0); +} + +TEST(AnythingMatcher, MatchesAnyArgument) { + using testing::_; + + { + absl::MockingBitGen gen; + ON_CALL(absl::MockUniform(), Call(absl::IntervalClosed, gen, _, 1000)) + .WillByDefault(Return(11)); + ON_CALL(absl::MockUniform(), + Call(absl::IntervalClosed, gen, _, Ne(1000))) + .WillByDefault(Return(99)); + + EXPECT_EQ(absl::Uniform(absl::IntervalClosed, gen, 10, 1000000), 99); + EXPECT_EQ(absl::Uniform(absl::IntervalClosed, gen, 10, 1000), 11); + } + + { + absl::MockingBitGen gen; + ON_CALL(absl::MockUniform(), Call(gen, 1, _)) + .WillByDefault(Return(25)); + ON_CALL(absl::MockUniform(), Call(gen, Ne(1), _)) + .WillByDefault(Return(99)); + EXPECT_EQ(absl::Uniform(gen, 3, 1000000), 99); + EXPECT_EQ(absl::Uniform(gen, 1, 1000000), 25); + } + + { + absl::MockingBitGen gen; + ON_CALL(absl::MockUniform(), Call(gen, _, _)) + .WillByDefault(Return(145)); + EXPECT_EQ(absl::Uniform(gen, 1, 1000), 145); + EXPECT_EQ(absl::Uniform(gen, 10, 1000), 145); + EXPECT_EQ(absl::Uniform(gen, 100, 1000), 145); + } +} + +TEST(AnythingMatcher, WithWillByDefault) { + using testing::_; + absl::MockingBitGen gen; + std::vector values = {11, 22, 33, 44, 55, 66, 77, 88, 99, 1010}; + + ON_CALL(absl::MockUniform(), Call(gen, 0, _)) + .WillByDefault(Return(0)); + for (int i = 0; i < 100; i++) { + auto& elem = values[absl::Uniform(gen, 0u, values.size())]; + EXPECT_EQ(elem, 11); + } +} + +TEST(BasicMocking, WillByDefaultWithArgs) { + using testing::_; + + absl::MockingBitGen gen; + ON_CALL(absl::MockPoisson(), Call(gen, _)) + .WillByDefault( + [](double lambda) { return static_cast(lambda * 10); }); + EXPECT_EQ(absl::Poisson(gen, 1.7), 17); + EXPECT_EQ(absl::Poisson(gen, 0.03), 0); +} + +TEST(MockingBitGen, InSequenceSucceedsInOrder) { + absl::MockingBitGen gen; + + testing::InSequence seq; + + EXPECT_CALL(absl::MockPoisson(), Call(gen, 1.0)).WillOnce(Return(3)); + EXPECT_CALL(absl::MockPoisson(), Call(gen, 2.0)).WillOnce(Return(4)); + + EXPECT_EQ(absl::Poisson(gen, 1.0), 3); + EXPECT_EQ(absl::Poisson(gen, 2.0), 4); +} + +} // namespace -- cgit v1.2.3