googletest：sample7分析

news/2025/3/1 12:15:56/文章来源:https://www.cnblogs.com/fortunely/p/18744200

待测文件
测试文件
小结
参考

待测文件

同sample6，都是prime_tables.h文件

PrimeTable类声明了素数表的一系列接口，包括
1）IsPrime：判断当前输入数n是否为素数；
2）GetNextPrime：找比输入数n大的下一个素数.

文件内容略.

测试文件

sample6的测试，类型参数化测试，利用"typed test" "type-parameterized tests" 2种方法复用test，对不同类型的派生类进行测试.

sample7的测试，接口测试，利用"value-parameterized tests" 复用test，测试接口的多个实现的公共属性.

步骤：
1）利用工厂方法CreateOnTheFlyPrimeTable, CreatePreCalculatedPrimeTable创建待测对象；
2）利用夹具类的Setup(),TearDown()负责待测对象的创建、销毁；
3）利用TEST_P()定义test；
4）利用INSTANTIATE_TEST_SUITE_P初始化作为测试参数的值列表.

tips: TEST_P(test_suite_name, test_name)定义一个test，test_suite_name必须匹配测试夹具名，test_name是自定义test名称.

// This sample shows how to test common properties of multiple
// implementations of an interface (aka interface tests) using
// value-parameterized tests. Each test in the test case has
// a parameter that is an interface pointer to an implementation
// tested.// The interface and its implementations are in this header.
#include "prime_tables.h"
#include "gtest/gtest.h"
namespace {using ::testing::TestWithParam;
using ::testing::Values;// As a general rule, to prevent a test from affecting the tests that come
// after it, you should create and destroy the tested objects for each test
// instead of reusing them.  In this sample we will define a simple factory
// function for PrimeTable objects.  We will instantiate objects in test's
// SetUp() method and delete them in TearDown() method.
typedef PrimeTable* CreatePrimeTableFunc();PrimeTable* CreateOnTheFlyPrimeTable() { return new OnTheFlyPrimeTable(); }template <size_t max_precalculated>
PrimeTable* CreatePreCalculatedPrimeTable() {return new PreCalculatedPrimeTable(max_precalculated);
}// Inside the test body, fixture constructor, SetUp(), and TearDown() you
// can refer to the test parameter by GetParam().  In this case, the test
// parameter is a factory function which we call in fixture's SetUp() to
// create and store an instance of PrimeTable.
class PrimeTableTestSmpl7 : public TestWithParam<CreatePrimeTableFunc*> {public:~PrimeTableTestSmpl7() override { delete table_; }void SetUp() override { table_ = (*GetParam())(); }void TearDown() override {delete table_;table_ = nullptr;}protected:PrimeTable* table_;
};TEST_P(PrimeTableTestSmpl7, ReturnsFalseForNonPrimes) {EXPECT_FALSE(table_->IsPrime(-5));EXPECT_FALSE(table_->IsPrime(0));EXPECT_FALSE(table_->IsPrime(1));EXPECT_FALSE(table_->IsPrime(4));EXPECT_FALSE(table_->IsPrime(6));EXPECT_FALSE(table_->IsPrime(100));
}TEST_P(PrimeTableTestSmpl7, ReturnsTrueForPrimes) {EXPECT_TRUE(table_->IsPrime(2));EXPECT_TRUE(table_->IsPrime(3));EXPECT_TRUE(table_->IsPrime(5));EXPECT_TRUE(table_->IsPrime(7));EXPECT_TRUE(table_->IsPrime(11));EXPECT_TRUE(table_->IsPrime(131));
}TEST_P(PrimeTableTestSmpl7, CanGetNextPrime) {EXPECT_EQ(2, table_->GetNextPrime(0));EXPECT_EQ(3, table_->GetNextPrime(2));EXPECT_EQ(5, table_->GetNextPrime(3));EXPECT_EQ(7, table_->GetNextPrime(5));EXPECT_EQ(11, table_->GetNextPrime(7));EXPECT_EQ(131, table_->GetNextPrime(128));
}// In order to run value-parameterized tests, you need to instantiate them,
// or bind them to a list of values which will be used as test parameters.
// You can instantiate them in a different translation module, or even
// instantiate them several times.
//
// Here, we instantiate our tests with a list of two PrimeTable object
// factory functions:
INSTANTIATE_TEST_SUITE_P(OnTheFlyAndPreCalculated, PrimeTableTestSmpl7,Values(&CreateOnTheFlyPrimeTable,&CreatePreCalculatedPrimeTable<1000>));}  // namespace