proxygen
sample7_unittest.cc
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30 // Author: vladl@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:
79 };
80 
81 TEST_P(PrimeTableTest, ReturnsFalseForNonPrimes) {
88 }
89 
90 TEST_P(PrimeTableTest, ReturnsTrueForPrimes) {
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:
116  OnTheFlyAndPreCalculated,
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
#define EXPECT_EQ(val1, val2)
Definition: gtest.h:1922
virtual bool IsPrime(int n) const =0
virtual void SetUp()
Definition: gtest.cc:2227
virtual void TearDown()
Definition: gtest.cc:2233
virtual int GetNextPrime(int p) const =0
TEST(DummyTest, ValueParameterizedTestsAreNotSupportedOnThisPlatform)
#define EXPECT_TRUE(condition)
Definition: gtest.h:1859
PrimeTable *const table_
INSTANTIATE_TEST_CASE_P(AllGraphs, BipartiteTest,::testing::Range(0, 5))
virtual ~PrimeTableTest()
#define EXPECT_FALSE(condition)
Definition: gtest.h:1862
TEST_P(BipartiteTest, Exhaustive)