1 // Copyright 2008 Google Inc. 2 // All Rights Reserved. 3 // 4 // Redistribution and use in source and binary forms, with or without 5 // modification, are permitted provided that the following conditions are 6 // met: 7 // 8 // * Redistributions of source code must retain the above copyright 9 // notice, this list of conditions and the following disclaimer. 10 // * Redistributions in binary form must reproduce the above 11 // copyright notice, this list of conditions and the following disclaimer 12 // in the documentation and/or other materials provided with the 13 // distribution. 14 // * Neither the name of Google Inc. nor the names of its 15 // contributors may be used to endorse or promote products derived from 16 // this software without specific prior written permission. 17 // 18 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 // 30 // Author: vladl (at) google.com (Vlad Losev) 31 32 // This sample shows how to test common properties of multiple 33 // implementations of an interface (aka interface tests) using 34 // value-parameterized tests. Each test in the test case has 35 // a parameter that is an interface pointer to an implementation 36 // tested. 37 38 // The interface and its implementations are in this header. 39 #include "prime_tables.h" 40 41 #include "gtest/gtest.h" 42 43 #if GTEST_HAS_PARAM_TEST 44 45 using ::testing::TestWithParam; 46 using ::testing::Values; 47 48 // As a general rule, to prevent a test from affecting the tests that come 49 // after it, you should create and destroy the tested objects for each test 50 // instead of reusing them. In this sample we will define a simple factory 51 // function for PrimeTable objects. We will instantiate objects in test's 52 // SetUp() method and delete them in TearDown() method. 53 typedef PrimeTable* CreatePrimeTableFunc(); 54 55 PrimeTable* CreateOnTheFlyPrimeTable() { 56 return new OnTheFlyPrimeTable(); 57 } 58 59 template <size_t max_precalculated> 60 PrimeTable* CreatePreCalculatedPrimeTable() { 61 return new PreCalculatedPrimeTable(max_precalculated); 62 } 63 64 // Inside the test body, fixture constructor, SetUp(), and TearDown() you 65 // can refer to the test parameter by GetParam(). In this case, the test 66 // parameter is a factory function which we call in fixture's SetUp() to 67 // create and store an instance of PrimeTable. 68 class PrimeTableTest : public TestWithParam<CreatePrimeTableFunc*> { 69 public: 70 virtual ~PrimeTableTest() { delete table_; } 71 virtual void SetUp() { table_ = (*GetParam())(); } 72 virtual void TearDown() { 73 delete table_; 74 table_ = NULL; 75 } 76 77 protected: 78 PrimeTable* table_; 79 }; 80 81 TEST_P(PrimeTableTest, ReturnsFalseForNonPrimes) { 82 EXPECT_FALSE(table_->IsPrime(-5)); 83 EXPECT_FALSE(table_->IsPrime(0)); 84 EXPECT_FALSE(table_->IsPrime(1)); 85 EXPECT_FALSE(table_->IsPrime(4)); 86 EXPECT_FALSE(table_->IsPrime(6)); 87 EXPECT_FALSE(table_->IsPrime(100)); 88 } 89 90 TEST_P(PrimeTableTest, ReturnsTrueForPrimes) { 91 EXPECT_TRUE(table_->IsPrime(2)); 92 EXPECT_TRUE(table_->IsPrime(3)); 93 EXPECT_TRUE(table_->IsPrime(5)); 94 EXPECT_TRUE(table_->IsPrime(7)); 95 EXPECT_TRUE(table_->IsPrime(11)); 96 EXPECT_TRUE(table_->IsPrime(131)); 97 } 98 99 TEST_P(PrimeTableTest, CanGetNextPrime) { 100 EXPECT_EQ(2, table_->GetNextPrime(0)); 101 EXPECT_EQ(3, table_->GetNextPrime(2)); 102 EXPECT_EQ(5, table_->GetNextPrime(3)); 103 EXPECT_EQ(7, table_->GetNextPrime(5)); 104 EXPECT_EQ(11, table_->GetNextPrime(7)); 105 EXPECT_EQ(131, table_->GetNextPrime(128)); 106 } 107 108 // In order to run value-parameterized tests, you need to instantiate them, 109 // or bind them to a list of values which will be used as test parameters. 110 // You can instantiate them in a different translation module, or even 111 // instantiate them several times. 112 // 113 // Here, we instantiate our tests with a list of two PrimeTable object 114 // factory functions: 115 INSTANTIATE_TEST_CASE_P( 116 OnTheFlyAndPreCalculated, 117 PrimeTableTest, 118 Values(&CreateOnTheFlyPrimeTable, &CreatePreCalculatedPrimeTable<1000>)); 119 120 #else 121 122 // Google Test may not support value-parameterized tests with some 123 // compilers. If we use conditional compilation to compile out all 124 // code referring to the gtest_main library, MSVC linker will not link 125 // that library at all and consequently complain about missing entry 126 // point defined in that library (fatal error LNK1561: entry point 127 // must be defined). This dummy test keeps gtest_main linked in. 128 TEST(DummyTest, ValueParameterizedTestsAreNotSupportedOnThisPlatform) {} 129 130 #endif // GTEST_HAS_PARAM_TEST 131
