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  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.