// Copyright 2008 Google Inc. // All Rights Reserved. // // Redistribution and use in source and binary forms, with or without // modification, are permitted provided that the following conditions are // met: // // * Redistributions of source code must retain the above copyright // notice, this list of conditions and the following disclaimer. // * Redistributions in binary form must reproduce the above // copyright notice, this list of conditions and the following disclaimer // in the documentation and/or other materials provided with the // distribution. // * Neither the name of Google Inc. nor the names of its // contributors may be used to endorse or promote products derived from // this software without specific prior written permission. // // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. // // Author: vladl@google.com (Vlad Losev) // This sample shows how to test common properties of multiple // implementations of an interface (aka interface tests) using // value-parameterized tests. Each test in the test case has // a parameter that is an interface pointer to an implementation // tested. // The interface and its implementations are in this header. #include "prime_tables.h" #include "gtest/gtest.h" namespace { #if GTEST_HAS_PARAM_TEST using ::testing::TestWithParam; using ::testing::Values; // As a general rule, to prevent a test from affecting the tests that come // after it, you should create and destroy the tested objects for each test // instead of reusing them. In this sample we will define a simple factory // function for PrimeTable objects. We will instantiate objects in test's // SetUp() method and delete them in TearDown() method. typedef PrimeTable* CreatePrimeTableFunc(); PrimeTable* CreateOnTheFlyPrimeTable() { return new OnTheFlyPrimeTable(); } template PrimeTable* CreatePreCalculatedPrimeTable() { return new PreCalculatedPrimeTable(max_precalculated); } // Inside the test body, fixture constructor, SetUp(), and TearDown() you // can refer to the test parameter by GetParam(). In this case, the test // parameter is a factory function which we call in fixture's SetUp() to // create and store an instance of PrimeTable. class PrimeTableTestSmpl7 : public TestWithParam { public: virtual ~PrimeTableTestSmpl7() { delete table_; } virtual void SetUp() { table_ = (*GetParam())(); } virtual void TearDown() { delete table_; table_ = NULL; } protected: PrimeTable* table_; }; TEST_P(PrimeTableTestSmpl7, ReturnsFalseForNonPrimes) { EXPECT_FALSE(table_->IsPrime(-5)); EXPECT_FALSE(table_->IsPrime(0)); EXPECT_FALSE(table_->IsPrime(1)); EXPECT_FALSE(table_->IsPrime(4)); EXPECT_FALSE(table_->IsPrime(6)); EXPECT_FALSE(table_->IsPrime(100)); } TEST_P(PrimeTableTestSmpl7, ReturnsTrueForPrimes) { EXPECT_TRUE(table_->IsPrime(2)); EXPECT_TRUE(table_->IsPrime(3)); EXPECT_TRUE(table_->IsPrime(5)); EXPECT_TRUE(table_->IsPrime(7)); EXPECT_TRUE(table_->IsPrime(11)); EXPECT_TRUE(table_->IsPrime(131)); } TEST_P(PrimeTableTestSmpl7, CanGetNextPrime) { EXPECT_EQ(2, table_->GetNextPrime(0)); EXPECT_EQ(3, table_->GetNextPrime(2)); EXPECT_EQ(5, table_->GetNextPrime(3)); EXPECT_EQ(7, table_->GetNextPrime(5)); EXPECT_EQ(11, table_->GetNextPrime(7)); EXPECT_EQ(131, table_->GetNextPrime(128)); } // In order to run value-parameterized tests, you need to instantiate them, // or bind them to a list of values which will be used as test parameters. // You can instantiate them in a different translation module, or even // instantiate them several times. // // Here, we instantiate our tests with a list of two PrimeTable object // factory functions: INSTANTIATE_TEST_CASE_P(OnTheFlyAndPreCalculated, PrimeTableTestSmpl7, Values(&CreateOnTheFlyPrimeTable, &CreatePreCalculatedPrimeTable<1000>)); #else // Google Test may not support value-parameterized tests with some // compilers. If we use conditional compilation to compile out all // code referring to the gtest_main library, MSVC linker will not link // that library at all and consequently complain about missing entry // point defined in that library (fatal error LNK1561: entry point // must be defined). This dummy test keeps gtest_main linked in. TEST(DummyTest, ValueParameterizedTestsAreNotSupportedOnThisPlatform) {} #endif // GTEST_HAS_PARAM_TEST } // namespace