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547 lines
23 KiB
C++
547 lines
23 KiB
C++
// Copyright 2008, Google Inc.
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// Macros and functions for implementing parameterized tests
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// in Google C++ Testing and Mocking Framework (Google Test)
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// IWYU pragma: private, include "gtest/gtest.h"
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// IWYU pragma: friend gtest/.*
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// IWYU pragma: friend gmock/.*
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#ifndef GOOGLETEST_INCLUDE_GTEST_GTEST_PARAM_TEST_H_
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#define GOOGLETEST_INCLUDE_GTEST_GTEST_PARAM_TEST_H_
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// Value-parameterized tests allow you to test your code with different
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// parameters without writing multiple copies of the same test.
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//
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// Here is how you use value-parameterized tests:
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#if 0
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// To write value-parameterized tests, first you should define a fixture
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// class. It is usually derived from testing::TestWithParam<T> (see below for
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// another inheritance scheme that's sometimes useful in more complicated
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// class hierarchies), where the type of your parameter values.
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// TestWithParam<T> is itself derived from testing::Test. T can be any
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// copyable type. If it's a raw pointer, you are responsible for managing the
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// lifespan of the pointed values.
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class FooTest : public ::testing::TestWithParam<const char*> {
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// You can implement all the usual class fixture members here.
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};
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// Then, use the TEST_P macro to define as many parameterized tests
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// for this fixture as you want. The _P suffix is for "parameterized"
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// or "pattern", whichever you prefer to think.
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TEST_P(FooTest, DoesBlah) {
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// Inside a test, access the test parameter with the GetParam() method
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// of the TestWithParam<T> class:
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EXPECT_TRUE(foo.Blah(GetParam()));
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...
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}
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TEST_P(FooTest, HasBlahBlah) {
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...
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}
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// Finally, you can use INSTANTIATE_TEST_SUITE_P to instantiate the test
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// case with any set of parameters you want. Google Test defines a number
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// of functions for generating test parameters. They return what we call
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// (surprise!) parameter generators. Here is a summary of them, which
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// are all in the testing namespace:
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//
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//
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// Range(begin, end [, step]) - Yields values {begin, begin+step,
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// begin+step+step, ...}. The values do not
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// include end. step defaults to 1.
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// Values(v1, v2, ..., vN) - Yields values {v1, v2, ..., vN}.
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// ValuesIn(container) - Yields values from a C-style array, an STL
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// ValuesIn(begin,end) container, or an iterator range [begin, end).
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// Bool() - Yields sequence {false, true}.
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// Combine(g1, g2, ..., gN) - Yields all combinations (the Cartesian product
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// for the math savvy) of the values generated
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// by the N generators.
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//
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// For more details, see comments at the definitions of these functions below
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// in this file.
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//
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// The following statement will instantiate tests from the FooTest test suite
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// each with parameter values "meeny", "miny", and "moe".
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INSTANTIATE_TEST_SUITE_P(InstantiationName,
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FooTest,
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Values("meeny", "miny", "moe"));
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// To distinguish different instances of the pattern, (yes, you
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// can instantiate it more than once) the first argument to the
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// INSTANTIATE_TEST_SUITE_P macro is a prefix that will be added to the
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// actual test suite name. Remember to pick unique prefixes for different
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// instantiations. The tests from the instantiation above will have
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// these names:
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//
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// * InstantiationName/FooTest.DoesBlah/0 for "meeny"
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// * InstantiationName/FooTest.DoesBlah/1 for "miny"
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// * InstantiationName/FooTest.DoesBlah/2 for "moe"
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// * InstantiationName/FooTest.HasBlahBlah/0 for "meeny"
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// * InstantiationName/FooTest.HasBlahBlah/1 for "miny"
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// * InstantiationName/FooTest.HasBlahBlah/2 for "moe"
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//
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// You can use these names in --gtest_filter.
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//
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// This statement will instantiate all tests from FooTest again, each
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// with parameter values "cat" and "dog":
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const char* pets[] = {"cat", "dog"};
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INSTANTIATE_TEST_SUITE_P(AnotherInstantiationName, FooTest, ValuesIn(pets));
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// The tests from the instantiation above will have these names:
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//
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// * AnotherInstantiationName/FooTest.DoesBlah/0 for "cat"
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// * AnotherInstantiationName/FooTest.DoesBlah/1 for "dog"
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// * AnotherInstantiationName/FooTest.HasBlahBlah/0 for "cat"
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// * AnotherInstantiationName/FooTest.HasBlahBlah/1 for "dog"
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//
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// Please note that INSTANTIATE_TEST_SUITE_P will instantiate all tests
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// in the given test suite, whether their definitions come before or
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// AFTER the INSTANTIATE_TEST_SUITE_P statement.
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//
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// Please also note that generator expressions (including parameters to the
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// generators) are evaluated in InitGoogleTest(), after main() has started.
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// This allows the user on one hand, to adjust generator parameters in order
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// to dynamically determine a set of tests to run and on the other hand,
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// give the user a chance to inspect the generated tests with Google Test
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// reflection API before RUN_ALL_TESTS() is executed.
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//
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// You can see samples/sample7_unittest.cc and samples/sample8_unittest.cc
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// for more examples.
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//
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// In the future, we plan to publish the API for defining new parameter
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// generators. But for now this interface remains part of the internal
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// implementation and is subject to change.
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//
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//
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// A parameterized test fixture must be derived from testing::Test and from
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// testing::WithParamInterface<T>, where T is the type of the parameter
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// values. Inheriting from TestWithParam<T> satisfies that requirement because
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// TestWithParam<T> inherits from both Test and WithParamInterface. In more
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// complicated hierarchies, however, it is occasionally useful to inherit
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// separately from Test and WithParamInterface. For example:
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class BaseTest : public ::testing::Test {
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// You can inherit all the usual members for a non-parameterized test
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// fixture here.
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};
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class DerivedTest : public BaseTest, public ::testing::WithParamInterface<int> {
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// The usual test fixture members go here too.
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};
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TEST_F(BaseTest, HasFoo) {
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// This is an ordinary non-parameterized test.
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}
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TEST_P(DerivedTest, DoesBlah) {
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// GetParam works just the same here as if you inherit from TestWithParam.
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EXPECT_TRUE(foo.Blah(GetParam()));
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}
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#endif // 0
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#include <iterator>
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#include <utility>
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#include "gtest/internal/gtest-internal.h"
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#include "gtest/internal/gtest-param-util.h"
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#include "gtest/internal/gtest-port.h"
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namespace testing {
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// Functions producing parameter generators.
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//
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// Google Test uses these generators to produce parameters for value-
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// parameterized tests. When a parameterized test suite is instantiated
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// with a particular generator, Google Test creates and runs tests
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// for each element in the sequence produced by the generator.
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//
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// In the following sample, tests from test suite FooTest are instantiated
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// each three times with parameter values 3, 5, and 8:
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//
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// class FooTest : public TestWithParam<int> { ... };
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//
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// TEST_P(FooTest, TestThis) {
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// }
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// TEST_P(FooTest, TestThat) {
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// }
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// INSTANTIATE_TEST_SUITE_P(TestSequence, FooTest, Values(3, 5, 8));
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//
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// Range() returns generators providing sequences of values in a range.
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//
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// Synopsis:
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// Range(start, end)
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// - returns a generator producing a sequence of values {start, start+1,
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// start+2, ..., }.
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// Range(start, end, step)
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// - returns a generator producing a sequence of values {start, start+step,
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// start+step+step, ..., }.
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// Notes:
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// * The generated sequences never include end. For example, Range(1, 5)
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// returns a generator producing a sequence {1, 2, 3, 4}. Range(1, 9, 2)
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// returns a generator producing {1, 3, 5, 7}.
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// * start and end must have the same type. That type may be any integral or
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// floating-point type or a user defined type satisfying these conditions:
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// * It must be assignable (have operator=() defined).
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// * It must have operator+() (operator+(int-compatible type) for
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// two-operand version).
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// * It must have operator<() defined.
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// Elements in the resulting sequences will also have that type.
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// * Condition start < end must be satisfied in order for resulting sequences
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// to contain any elements.
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//
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template <typename T, typename IncrementT>
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internal::ParamGenerator<T> Range(T start, T end, IncrementT step) {
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return internal::ParamGenerator<T>(
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new internal::RangeGenerator<T, IncrementT>(start, end, step));
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}
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template <typename T>
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internal::ParamGenerator<T> Range(T start, T end) {
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return Range(start, end, 1);
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}
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// ValuesIn() function allows generation of tests with parameters coming from
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// a container.
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//
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// Synopsis:
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// ValuesIn(const T (&array)[N])
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// - returns a generator producing sequences with elements from
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// a C-style array.
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// ValuesIn(const Container& container)
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// - returns a generator producing sequences with elements from
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// an STL-style container.
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// ValuesIn(Iterator begin, Iterator end)
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// - returns a generator producing sequences with elements from
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// a range [begin, end) defined by a pair of STL-style iterators. These
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// iterators can also be plain C pointers.
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//
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// Please note that ValuesIn copies the values from the containers
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// passed in and keeps them to generate tests in RUN_ALL_TESTS().
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//
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// Examples:
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//
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// This instantiates tests from test suite StringTest
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// each with C-string values of "foo", "bar", and "baz":
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//
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// const char* strings[] = {"foo", "bar", "baz"};
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// INSTANTIATE_TEST_SUITE_P(StringSequence, StringTest, ValuesIn(strings));
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//
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// This instantiates tests from test suite StlStringTest
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// each with STL strings with values "a" and "b":
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//
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// ::std::vector< ::std::string> GetParameterStrings() {
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// ::std::vector< ::std::string> v;
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// v.push_back("a");
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// v.push_back("b");
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// return v;
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// }
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//
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// INSTANTIATE_TEST_SUITE_P(CharSequence,
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// StlStringTest,
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// ValuesIn(GetParameterStrings()));
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//
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//
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// This will also instantiate tests from CharTest
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// each with parameter values 'a' and 'b':
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//
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// ::std::list<char> GetParameterChars() {
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// ::std::list<char> list;
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// list.push_back('a');
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// list.push_back('b');
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// return list;
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// }
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// ::std::list<char> l = GetParameterChars();
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// INSTANTIATE_TEST_SUITE_P(CharSequence2,
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// CharTest,
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// ValuesIn(l.begin(), l.end()));
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//
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template <typename ForwardIterator>
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internal::ParamGenerator<
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typename std::iterator_traits<ForwardIterator>::value_type>
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ValuesIn(ForwardIterator begin, ForwardIterator end) {
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typedef typename std::iterator_traits<ForwardIterator>::value_type ParamType;
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return internal::ParamGenerator<ParamType>(
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new internal::ValuesInIteratorRangeGenerator<ParamType>(begin, end));
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}
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template <typename T, size_t N>
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internal::ParamGenerator<T> ValuesIn(const T (&array)[N]) {
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return ValuesIn(array, array + N);
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}
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template <class Container>
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internal::ParamGenerator<typename Container::value_type> ValuesIn(
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const Container& container) {
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return ValuesIn(container.begin(), container.end());
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}
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// Values() allows generating tests from explicitly specified list of
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// parameters.
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//
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// Synopsis:
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// Values(T v1, T v2, ..., T vN)
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// - returns a generator producing sequences with elements v1, v2, ..., vN.
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//
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// For example, this instantiates tests from test suite BarTest each
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// with values "one", "two", and "three":
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//
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// INSTANTIATE_TEST_SUITE_P(NumSequence,
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// BarTest,
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// Values("one", "two", "three"));
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//
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// This instantiates tests from test suite BazTest each with values 1, 2, 3.5.
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// The exact type of values will depend on the type of parameter in BazTest.
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//
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// INSTANTIATE_TEST_SUITE_P(FloatingNumbers, BazTest, Values(1, 2, 3.5));
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//
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//
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template <typename... T>
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internal::ValueArray<T...> Values(T... v) {
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return internal::ValueArray<T...>(std::move(v)...);
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}
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// Bool() allows generating tests with parameters in a set of (false, true).
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//
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// Synopsis:
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// Bool()
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// - returns a generator producing sequences with elements {false, true}.
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//
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// It is useful when testing code that depends on Boolean flags. Combinations
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// of multiple flags can be tested when several Bool()'s are combined using
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// Combine() function.
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//
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// In the following example all tests in the test suite FlagDependentTest
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// will be instantiated twice with parameters false and true.
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//
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// class FlagDependentTest : public testing::TestWithParam<bool> {
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// virtual void SetUp() {
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// external_flag = GetParam();
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// }
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// }
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// INSTANTIATE_TEST_SUITE_P(BoolSequence, FlagDependentTest, Bool());
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//
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inline internal::ParamGenerator<bool> Bool() { return Values(false, true); }
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// Combine() allows the user to combine two or more sequences to produce
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// values of a Cartesian product of those sequences' elements.
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//
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// Synopsis:
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// Combine(gen1, gen2, ..., genN)
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// - returns a generator producing sequences with elements coming from
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// the Cartesian product of elements from the sequences generated by
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// gen1, gen2, ..., genN. The sequence elements will have a type of
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// std::tuple<T1, T2, ..., TN> where T1, T2, ..., TN are the types
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// of elements from sequences produces by gen1, gen2, ..., genN.
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//
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// Example:
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//
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// This will instantiate tests in test suite AnimalTest each one with
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// the parameter values tuple("cat", BLACK), tuple("cat", WHITE),
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// tuple("dog", BLACK), and tuple("dog", WHITE):
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//
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// enum Color { BLACK, GRAY, WHITE };
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// class AnimalTest
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// : public testing::TestWithParam<std::tuple<const char*, Color> > {...};
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//
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// TEST_P(AnimalTest, AnimalLooksNice) {...}
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//
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// INSTANTIATE_TEST_SUITE_P(AnimalVariations, AnimalTest,
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// Combine(Values("cat", "dog"),
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// Values(BLACK, WHITE)));
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//
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// This will instantiate tests in FlagDependentTest with all variations of two
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// Boolean flags:
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//
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// class FlagDependentTest
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// : public testing::TestWithParam<std::tuple<bool, bool> > {
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// virtual void SetUp() {
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// // Assigns external_flag_1 and external_flag_2 values from the tuple.
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// std::tie(external_flag_1, external_flag_2) = GetParam();
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// }
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// };
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//
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// TEST_P(FlagDependentTest, TestFeature1) {
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// // Test your code using external_flag_1 and external_flag_2 here.
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// }
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// INSTANTIATE_TEST_SUITE_P(TwoBoolSequence, FlagDependentTest,
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// Combine(Bool(), Bool()));
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//
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template <typename... Generator>
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internal::CartesianProductHolder<Generator...> Combine(const Generator&... g) {
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return internal::CartesianProductHolder<Generator...>(g...);
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}
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// ConvertGenerator() wraps a parameter generator in order to cast each produced
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// value through a known type before supplying it to the test suite
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//
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// Synopsis:
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// ConvertGenerator<T>(gen)
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// - returns a generator producing the same elements as generated by gen, but
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// each element is static_cast to type T before being returned
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//
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// It is useful when using the Combine() function to get the generated
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// parameters in a custom type instead of std::tuple
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//
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// Example:
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//
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// This will instantiate tests in test suite AnimalTest each one with
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// the parameter values tuple("cat", BLACK), tuple("cat", WHITE),
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// tuple("dog", BLACK), and tuple("dog", WHITE):
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//
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// enum Color { BLACK, GRAY, WHITE };
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// struct ParamType {
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// using TupleT = std::tuple<const char*, Color>;
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// std::string animal;
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// Color color;
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// ParamType(TupleT t) : animal(std::get<0>(t)), color(std::get<1>(t)) {}
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// };
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// class AnimalTest
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// : public testing::TestWithParam<ParamType> {...};
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//
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// TEST_P(AnimalTest, AnimalLooksNice) {...}
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//
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// INSTANTIATE_TEST_SUITE_P(AnimalVariations, AnimalTest,
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// ConvertGenerator<ParamType::TupleT>(
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// Combine(Values("cat", "dog"),
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// Values(BLACK, WHITE))));
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//
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template <typename T>
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internal::ParamConverterGenerator<T> ConvertGenerator(
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internal::ParamGenerator<T> gen) {
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return internal::ParamConverterGenerator<T>(gen);
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}
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#define TEST_P(test_suite_name, test_name) \
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class GTEST_TEST_CLASS_NAME_(test_suite_name, test_name) \
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: public test_suite_name, \
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private ::testing::internal::GTestNonCopyable { \
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public: \
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GTEST_TEST_CLASS_NAME_(test_suite_name, test_name)() {} \
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void TestBody() override; \
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\
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private: \
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static int AddToRegistry() { \
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::testing::UnitTest::GetInstance() \
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->parameterized_test_registry() \
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.GetTestSuitePatternHolder<test_suite_name>( \
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GTEST_STRINGIFY_(test_suite_name), \
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::testing::internal::CodeLocation(__FILE__, __LINE__)) \
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->AddTestPattern( \
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GTEST_STRINGIFY_(test_suite_name), GTEST_STRINGIFY_(test_name), \
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new ::testing::internal::TestMetaFactory<GTEST_TEST_CLASS_NAME_( \
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|
test_suite_name, test_name)>(), \
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::testing::internal::CodeLocation(__FILE__, __LINE__)); \
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|
return 0; \
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|
} \
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|
static int gtest_registering_dummy_ GTEST_ATTRIBUTE_UNUSED_; \
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|
}; \
|
|
int GTEST_TEST_CLASS_NAME_(test_suite_name, \
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|
test_name)::gtest_registering_dummy_ = \
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|
GTEST_TEST_CLASS_NAME_(test_suite_name, test_name)::AddToRegistry(); \
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|
void GTEST_TEST_CLASS_NAME_(test_suite_name, test_name)::TestBody()
|
|
|
|
// The last argument to INSTANTIATE_TEST_SUITE_P allows the user to specify
|
|
// generator and an optional function or functor that generates custom test name
|
|
// suffixes based on the test parameters. Such a function or functor should
|
|
// accept one argument of type testing::TestParamInfo<class ParamType>, and
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|
// return std::string.
|
|
//
|
|
// testing::PrintToStringParamName is a builtin test suffix generator that
|
|
// returns the value of testing::PrintToString(GetParam()).
|
|
//
|
|
// Note: test names must be non-empty, unique, and may only contain ASCII
|
|
// alphanumeric characters or underscore. Because PrintToString adds quotes
|
|
// to std::string and C strings, it won't work for these types.
|
|
|
|
#define GTEST_EXPAND_(arg) arg
|
|
#define GTEST_GET_FIRST_(first, ...) first
|
|
#define GTEST_GET_SECOND_(first, second, ...) second
|
|
|
|
#define INSTANTIATE_TEST_SUITE_P(prefix, test_suite_name, ...) \
|
|
static ::testing::internal::ParamGenerator<test_suite_name::ParamType> \
|
|
gtest_##prefix##test_suite_name##_EvalGenerator_() { \
|
|
return GTEST_EXPAND_(GTEST_GET_FIRST_(__VA_ARGS__, DUMMY_PARAM_)); \
|
|
} \
|
|
static ::std::string gtest_##prefix##test_suite_name##_EvalGenerateName_( \
|
|
const ::testing::TestParamInfo<test_suite_name::ParamType>& info) { \
|
|
if (::testing::internal::AlwaysFalse()) { \
|
|
::testing::internal::TestNotEmpty(GTEST_EXPAND_(GTEST_GET_SECOND_( \
|
|
__VA_ARGS__, \
|
|
::testing::internal::DefaultParamName<test_suite_name::ParamType>, \
|
|
DUMMY_PARAM_))); \
|
|
auto t = std::make_tuple(__VA_ARGS__); \
|
|
static_assert(std::tuple_size<decltype(t)>::value <= 2, \
|
|
"Too Many Args!"); \
|
|
} \
|
|
return ((GTEST_EXPAND_(GTEST_GET_SECOND_( \
|
|
__VA_ARGS__, \
|
|
::testing::internal::DefaultParamName<test_suite_name::ParamType>, \
|
|
DUMMY_PARAM_))))(info); \
|
|
} \
|
|
static int gtest_##prefix##test_suite_name##_dummy_ \
|
|
GTEST_ATTRIBUTE_UNUSED_ = \
|
|
::testing::UnitTest::GetInstance() \
|
|
->parameterized_test_registry() \
|
|
.GetTestSuitePatternHolder<test_suite_name>( \
|
|
GTEST_STRINGIFY_(test_suite_name), \
|
|
::testing::internal::CodeLocation(__FILE__, __LINE__)) \
|
|
->AddTestSuiteInstantiation( \
|
|
GTEST_STRINGIFY_(prefix), \
|
|
>est_##prefix##test_suite_name##_EvalGenerator_, \
|
|
>est_##prefix##test_suite_name##_EvalGenerateName_, \
|
|
__FILE__, __LINE__)
|
|
|
|
// Allow Marking a Parameterized test class as not needing to be instantiated.
|
|
#define GTEST_ALLOW_UNINSTANTIATED_PARAMETERIZED_TEST(T) \
|
|
namespace gtest_do_not_use_outside_namespace_scope {} \
|
|
static const ::testing::internal::MarkAsIgnored gtest_allow_ignore_##T( \
|
|
GTEST_STRINGIFY_(T))
|
|
|
|
// Legacy API is deprecated but still available
|
|
#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
|
|
#define INSTANTIATE_TEST_CASE_P \
|
|
static_assert(::testing::internal::InstantiateTestCase_P_IsDeprecated(), \
|
|
""); \
|
|
INSTANTIATE_TEST_SUITE_P
|
|
#endif // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
|
|
|
|
} // namespace testing
|
|
|
|
#endif // GOOGLETEST_INCLUDE_GTEST_GTEST_PARAM_TEST_H_
|