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 31 // This sample shows how to test common properties of multiple 32 // implementations of an interface (aka interface tests) using 33 // value-parameterized tests. Each test in the test case has 34 // a parameter that is an interface pointer to an implementation 35 // tested. 36 37 // The interface and its implementations are in this header. 38 #include "prime_tables.h" 39 40 #include "gtest/gtest.h" 41 namespace { 42 43 using ::testing::TestWithParam; 44 using ::testing::Values; 45 46 // As a general rule, to prevent a test from affecting the tests that come 47 // after it, you should create and destroy the tested objects for each test 48 // instead of reusing them. In this sample we will define a simple factory 49 // function for PrimeTable objects. We will instantiate objects in test's 50 // SetUp() method and delete them in TearDown() method. 51 typedef PrimeTable* CreatePrimeTableFunc(); 52 53 PrimeTable* CreateOnTheFlyPrimeTable() { 54 return new OnTheFlyPrimeTable(); 55 } 56 57 template <size_t max_precalculated> 58 PrimeTable* CreatePreCalculatedPrimeTable() { 59 return new PreCalculatedPrimeTable(max_precalculated); 60 } 61 62 // Inside the test body, fixture constructor, SetUp(), and TearDown() you 63 // can refer to the test parameter by GetParam(). In this case, the test 64 // parameter is a factory function which we call in fixture's SetUp() to 65 // create and store an instance of PrimeTable. 66 class PrimeTableTestSmpl7 : public TestWithParam<CreatePrimeTableFunc*> { 67 public: 68 virtual ~PrimeTableTestSmpl7() { delete table_; } 69 virtual void SetUp() { table_ = (*GetParam())(); } 70 virtual void TearDown() { 71 delete table_; 72 table_ = NULL; 73 } 74 75 protected: 76 PrimeTable* table_; 77 }; 78 79 TEST_P(PrimeTableTestSmpl7, ReturnsFalseForNonPrimes) { 80 EXPECT_FALSE(table_->IsPrime(-5)); 81 EXPECT_FALSE(table_->IsPrime(0)); 82 EXPECT_FALSE(table_->IsPrime(1)); 83 EXPECT_FALSE(table_->IsPrime(4)); 84 EXPECT_FALSE(table_->IsPrime(6)); 85 EXPECT_FALSE(table_->IsPrime(100)); 86 } 87 88 TEST_P(PrimeTableTestSmpl7, ReturnsTrueForPrimes) { 89 EXPECT_TRUE(table_->IsPrime(2)); 90 EXPECT_TRUE(table_->IsPrime(3)); 91 EXPECT_TRUE(table_->IsPrime(5)); 92 EXPECT_TRUE(table_->IsPrime(7)); 93 EXPECT_TRUE(table_->IsPrime(11)); 94 EXPECT_TRUE(table_->IsPrime(131)); 95 } 96 97 TEST_P(PrimeTableTestSmpl7, CanGetNextPrime) { 98 EXPECT_EQ(2, table_->GetNextPrime(0)); 99 EXPECT_EQ(3, table_->GetNextPrime(2)); 100 EXPECT_EQ(5, table_->GetNextPrime(3)); 101 EXPECT_EQ(7, table_->GetNextPrime(5)); 102 EXPECT_EQ(11, table_->GetNextPrime(7)); 103 EXPECT_EQ(131, table_->GetNextPrime(128)); 104 } 105 106 // In order to run value-parameterized tests, you need to instantiate them, 107 // or bind them to a list of values which will be used as test parameters. 108 // You can instantiate them in a different translation module, or even 109 // instantiate them several times. 110 // 111 // Here, we instantiate our tests with a list of two PrimeTable object 112 // factory functions: 113 INSTANTIATE_TEST_CASE_P(OnTheFlyAndPreCalculated, PrimeTableTestSmpl7, 114 Values(&CreateOnTheFlyPrimeTable, 115 &CreatePreCalculatedPrimeTable<1000>)); 116 117 } // namespace 118