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