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mock_distributions_test.cc
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mock_distributions_test.cc
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// 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/mock_distributions.h"
#include <cmath>
#include <limits>
#include "gmock/gmock.h"
#include "gtest/gtest.h"
#include "absl/numeric/int128.h"
#include "absl/random/distributions.h"
#include "absl/random/mocking_bit_gen.h"
#include "absl/random/random.h"
namespace {
using ::testing::Return;
TEST(MockDistributions, Examples) {
absl::MockingBitGen gen;
EXPECT_NE(absl::Uniform<int>(gen, 1, 1000000), 20);
EXPECT_CALL(absl::MockUniform<int>(), Call(gen, 1, 1000000))
.WillOnce(Return(20));
EXPECT_EQ(absl::Uniform<int>(gen, 1, 1000000), 20);
EXPECT_NE(absl::Uniform<double>(gen, 0.0, 100.0), 5.0);
EXPECT_CALL(absl::MockUniform<double>(), Call(gen, 0.0, 100.0))
.WillOnce(Return(5.0));
EXPECT_EQ(absl::Uniform<double>(gen, 0.0, 100.0), 5.0);
EXPECT_NE(absl::Exponential<double>(gen, 1.0), 42);
EXPECT_CALL(absl::MockExponential<double>(), Call(gen, 1.0))
.WillOnce(Return(42));
EXPECT_EQ(absl::Exponential<double>(gen, 1.0), 42);
EXPECT_NE(absl::Poisson<int>(gen, 1.0), 500);
EXPECT_CALL(absl::MockPoisson<int>(), Call(gen, 1.0)).WillOnce(Return(500));
EXPECT_EQ(absl::Poisson<int>(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::Beta<double>(gen, 3.0, 2.0), 0.567);
EXPECT_CALL(absl::MockBeta<double>(), Call(gen, 3.0, 2.0))
.WillOnce(Return(0.567));
EXPECT_EQ(absl::Beta<double>(gen, 3.0, 2.0), 0.567);
EXPECT_NE(absl::Zipf<int>(gen, 1000000, 2.0, 1.0), 1221);
EXPECT_CALL(absl::MockZipf<int>(), Call(gen, 1000000, 2.0, 1.0))
.WillOnce(Return(1221));
EXPECT_EQ(absl::Zipf<int>(gen, 1000000, 2.0, 1.0), 1221);
EXPECT_NE(absl::Gaussian<double>(gen, 0.0, 1.0), 0.001);
EXPECT_CALL(absl::MockGaussian<double>(), Call(gen, 0.0, 1.0))
.WillOnce(Return(0.001));
EXPECT_EQ(absl::Gaussian<double>(gen, 0.0, 1.0), 0.001);
EXPECT_NE(absl::LogUniform<int>(gen, 0, 1000000, 2), 2040);
EXPECT_CALL(absl::MockLogUniform<int>(), Call(gen, 0, 1000000, 2))
.WillOnce(Return(2040));
EXPECT_EQ(absl::LogUniform<int>(gen, 0, 1000000, 2), 2040);
}
TEST(MockUniform, OutOfBoundsIsAllowed) {
absl::UnvalidatedMockingBitGen gen;
EXPECT_CALL(absl::MockUniform<int>(), Call(gen, 1, 100)).WillOnce(Return(0));
EXPECT_EQ(absl::Uniform<int>(gen, 1, 100), 0);
}
TEST(ValidatedMockDistributions, UniformUInt128Works) {
absl::MockingBitGen gen;
EXPECT_CALL(absl::MockUniform<absl::uint128>(), Call(gen))
.WillOnce(Return(absl::Uint128Max()));
EXPECT_EQ(absl::Uniform<absl::uint128>(gen), absl::Uint128Max());
}
TEST(ValidatedMockDistributions, UniformDoubleBoundaryCases) {
absl::MockingBitGen gen;
EXPECT_CALL(absl::MockUniform<double>(), Call(gen, 1.0, 10.0))
.WillOnce(Return(
std::nextafter(10.0, -std::numeric_limits<double>::infinity())));
EXPECT_EQ(absl::Uniform<double>(gen, 1.0, 10.0),
std::nextafter(10.0, -std::numeric_limits<double>::infinity()));
EXPECT_CALL(absl::MockUniform<double>(),
Call(absl::IntervalOpen, gen, 1.0, 10.0))
.WillOnce(Return(
std::nextafter(10.0, -std::numeric_limits<double>::infinity())));
EXPECT_EQ(absl::Uniform<double>(absl::IntervalOpen, gen, 1.0, 10.0),
std::nextafter(10.0, -std::numeric_limits<double>::infinity()));
EXPECT_CALL(absl::MockUniform<double>(),
Call(absl::IntervalOpen, gen, 1.0, 10.0))
.WillOnce(
Return(std::nextafter(1.0, std::numeric_limits<double>::infinity())));
EXPECT_EQ(absl::Uniform<double>(absl::IntervalOpen, gen, 1.0, 10.0),
std::nextafter(1.0, std::numeric_limits<double>::infinity()));
}
TEST(ValidatedMockDistributions, UniformDoubleEmptyRangeCases) {
absl::MockingBitGen gen;
ON_CALL(absl::MockUniform<double>(), Call(absl::IntervalOpen, gen, 1.0, 1.0))
.WillByDefault(Return(1.0));
EXPECT_EQ(absl::Uniform<double>(absl::IntervalOpen, gen, 1.0, 1.0), 1.0);
ON_CALL(absl::MockUniform<double>(),
Call(absl::IntervalOpenClosed, gen, 1.0, 1.0))
.WillByDefault(Return(1.0));
EXPECT_EQ(absl::Uniform<double>(absl::IntervalOpenClosed, gen, 1.0, 1.0),
1.0);
ON_CALL(absl::MockUniform<double>(),
Call(absl::IntervalClosedOpen, gen, 1.0, 1.0))
.WillByDefault(Return(1.0));
EXPECT_EQ(absl::Uniform<double>(absl::IntervalClosedOpen, gen, 1.0, 1.0),
1.0);
}
TEST(ValidatedMockDistributions, UniformIntEmptyRangeCases) {
absl::MockingBitGen gen;
ON_CALL(absl::MockUniform<int>(), Call(absl::IntervalOpen, gen, 1, 1))
.WillByDefault(Return(1));
EXPECT_EQ(absl::Uniform<int>(absl::IntervalOpen, gen, 1, 1), 1);
ON_CALL(absl::MockUniform<int>(), Call(absl::IntervalOpenClosed, gen, 1, 1))
.WillByDefault(Return(1));
EXPECT_EQ(absl::Uniform<int>(absl::IntervalOpenClosed, gen, 1, 1), 1);
ON_CALL(absl::MockUniform<int>(), Call(absl::IntervalClosedOpen, gen, 1, 1))
.WillByDefault(Return(1));
EXPECT_EQ(absl::Uniform<int>(absl::IntervalClosedOpen, gen, 1, 1), 1);
}
TEST(ValidatedMockUniformDeathTest, Examples) {
absl::MockingBitGen gen;
EXPECT_DEATH_IF_SUPPORTED(
{
EXPECT_CALL(absl::MockUniform<int>(), Call(gen, 1, 100))
.WillOnce(Return(0));
absl::Uniform<int>(gen, 1, 100);
},
" 0 is not in \\[1, 100\\)");
EXPECT_DEATH_IF_SUPPORTED(
{
EXPECT_CALL(absl::MockUniform<int>(), Call(gen, 1, 100))
.WillOnce(Return(101));
absl::Uniform<int>(gen, 1, 100);
},
" 101 is not in \\[1, 100\\)");
EXPECT_DEATH_IF_SUPPORTED(
{
EXPECT_CALL(absl::MockUniform<int>(), Call(gen, 1, 100))
.WillOnce(Return(100));
absl::Uniform<int>(gen, 1, 100);
},
" 100 is not in \\[1, 100\\)");
EXPECT_DEATH_IF_SUPPORTED(
{
EXPECT_CALL(absl::MockUniform<int>(),
Call(absl::IntervalOpen, gen, 1, 100))
.WillOnce(Return(1));
absl::Uniform<int>(absl::IntervalOpen, gen, 1, 100);
},
" 1 is not in \\(1, 100\\)");
EXPECT_DEATH_IF_SUPPORTED(
{
EXPECT_CALL(absl::MockUniform<int>(),
Call(absl::IntervalOpen, gen, 1, 100))
.WillOnce(Return(101));
absl::Uniform<int>(absl::IntervalOpen, gen, 1, 100);
},
" 101 is not in \\(1, 100\\)");
EXPECT_DEATH_IF_SUPPORTED(
{
EXPECT_CALL(absl::MockUniform<int>(),
Call(absl::IntervalOpen, gen, 1, 100))
.WillOnce(Return(100));
absl::Uniform<int>(absl::IntervalOpen, gen, 1, 100);
},
" 100 is not in \\(1, 100\\)");
EXPECT_DEATH_IF_SUPPORTED(
{
EXPECT_CALL(absl::MockUniform<int>(),
Call(absl::IntervalOpenClosed, gen, 1, 100))
.WillOnce(Return(1));
absl::Uniform<int>(absl::IntervalOpenClosed, gen, 1, 100);
},
" 1 is not in \\(1, 100\\]");
EXPECT_DEATH_IF_SUPPORTED(
{
EXPECT_CALL(absl::MockUniform<int>(),
Call(absl::IntervalOpenClosed, gen, 1, 100))
.WillOnce(Return(101));
absl::Uniform<int>(absl::IntervalOpenClosed, gen, 1, 100);
},
" 101 is not in \\(1, 100\\]");
EXPECT_DEATH_IF_SUPPORTED(
{
EXPECT_CALL(absl::MockUniform<int>(),
Call(absl::IntervalOpenClosed, gen, 1, 100))
.WillOnce(Return(0));
absl::Uniform<int>(absl::IntervalOpenClosed, gen, 1, 100);
},
" 0 is not in \\(1, 100\\]");
EXPECT_DEATH_IF_SUPPORTED(
{
EXPECT_CALL(absl::MockUniform<int>(),
Call(absl::IntervalOpenClosed, gen, 1, 100))
.WillOnce(Return(101));
absl::Uniform<int>(absl::IntervalOpenClosed, gen, 1, 100);
},
" 101 is not in \\(1, 100\\]");
EXPECT_DEATH_IF_SUPPORTED(
{
EXPECT_CALL(absl::MockUniform<int>(),
Call(absl::IntervalClosed, gen, 1, 100))
.WillOnce(Return(0));
absl::Uniform<int>(absl::IntervalClosed, gen, 1, 100);
},
" 0 is not in \\[1, 100\\]");
EXPECT_DEATH_IF_SUPPORTED(
{
EXPECT_CALL(absl::MockUniform<int>(),
Call(absl::IntervalClosed, gen, 1, 100))
.WillOnce(Return(101));
absl::Uniform<int>(absl::IntervalClosed, gen, 1, 100);
},
" 101 is not in \\[1, 100\\]");
}
TEST(ValidatedMockUniformDeathTest, DoubleBoundaryCases) {
absl::MockingBitGen gen;
EXPECT_DEATH_IF_SUPPORTED(
{
EXPECT_CALL(absl::MockUniform<double>(), Call(gen, 1.0, 10.0))
.WillOnce(Return(10.0));
EXPECT_EQ(absl::Uniform<double>(gen, 1.0, 10.0), 10.0);
},
" 10 is not in \\[1, 10\\)");
EXPECT_DEATH_IF_SUPPORTED(
{
EXPECT_CALL(absl::MockUniform<double>(),
Call(absl::IntervalOpen, gen, 1.0, 10.0))
.WillOnce(Return(10.0));
EXPECT_EQ(absl::Uniform<double>(absl::IntervalOpen, gen, 1.0, 10.0),
10.0);
},
" 10 is not in \\(1, 10\\)");
EXPECT_DEATH_IF_SUPPORTED(
{
EXPECT_CALL(absl::MockUniform<double>(),
Call(absl::IntervalOpen, gen, 1.0, 10.0))
.WillOnce(Return(1.0));
EXPECT_EQ(absl::Uniform<double>(absl::IntervalOpen, gen, 1.0, 10.0),
1.0);
},
" 1 is not in \\(1, 10\\)");
}
} // namespace