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