GTest,仅参数化测试用例 [英] GTest, parameterize test case only
问题描述
我想应用参数化测试并具有以下功能:
I want to apply a parameterized test and have the following fixture:
class MyTest: public ::testing::TestWithParam<float> {...};
我想设置两个参数化的测试用例,其中一个参数较小的失败,但是较大的成功.
I want to set up two parameterized test cases, one where small parameters fail, but larger succeed.
TEST_P(MyTest, smallParamsFail)
{
auto param = GetParam();
EXPECT_EQ(true, param<1);
}
TEST_P(MyTest, largeParamsSucceed)
{
auto param = GetParam();
EXPECT_EQ(true, param>1);
}
我现在想以较小的值开始测试用例smallParamsFail,以较小的值开始另一个.不幸的是,我只能像这样对整个测试进行参数设置:
I want now to start testcase smallParamsFail with values smaller one, the other with values larger one. Unfortunately, I can only parameterize the whole test like this:
INSTANTIATE_TEST_CASE_P(
testLargeParams,
MyTest,
::testing::Values(2.0f, 3.14f));
这将同时执行两个测试用例,并且显然在case smallParamsFail上崩溃.我需要的是仅在测试用例largeParamsSucceed上使用参数2.0f,3.14f实例化MyTest.然后使用适当的参数以相同的方式启动另一种情况.
That will execute both test cases and obviously crash on case smallParamsFail. What I need is an instantiation of MyTest with the parameters 2.0f, 3.14f only on test case largeParamsSucceed. And then initiate the other case in same manner with appropriate parameters.
推荐答案
在GTest中是不可能的,正如yksisarvinen .
It's not possible in GTest, as already mentioned in the comment by yksisarvinen.
我将使用以下解决方法
class MyTestBase: public ::testing::TestWithParam<float> {
protected:
MyTestBase() {
// whatever
}
// whatever
int someParam_;
};
class MyTestForSmall: public MyTestBase {
};
class MyTestForBig: public MyTestBase {
};
TEST_P(MyTestForSmall, smallParamsFail) {
auto param = GetParam();
EXPECT_EQ(true, param<1);
}
TEST_P(MyTestForBig, largeParamsSucceed) {
auto param = GetParam();
EXPECT_EQ(true, param>1);
}
TEST_P(MyTestBase, someGeneralTest) {
auto param = GetParam();
EXPECT_TRUE(true);
}
INSTANTIATE_TEST_CASE_P(
testSmallParams,
MyTestForSmall,
::testing::Values(0.1, 0.2));
INSTANTIATE_TEST_CASE_P(
testLargeParams,
MyTestForBig,
::testing::Values(2.0f, 3.14f));
INSTANTIATE_TEST_CASE_P(
allKindsOfParams,
MyTestBase,
::testing::Values(0.1, 0.2, 2.0f, 3.14f));
在基类中,您可以设置所有必要的环境,并将子类仅用于测试参数的分离.
In the base class you can setup all necessary environment and use child classes only for test parameters separation.
可能的输出:
[----------] 2 tests from testSmallParams/MyTestForSmall
[ RUN ] testSmallParams/MyTestForSmall.smallParamsFail/0
[ OK ] testSmallParams/MyTestForSmall.smallParamsFail/0 (0 ms)
[ RUN ] testSmallParams/MyTestForSmall.smallParamsFail/1
[ OK ] testSmallParams/MyTestForSmall.smallParamsFail/1 (0 ms)
[----------] 2 tests from testSmallParams/MyTestForSmall (0 ms total)
[----------] 2 tests from testLargeParams/MyTestForBig
[ RUN ] testLargeParams/MyTestForBig.largeParamsSucceed/0
[ OK ] testLargeParams/MyTestForBig.largeParamsSucceed/0 (0 ms)
[ RUN ] testLargeParams/MyTestForBig.largeParamsSucceed/1
[ OK ] testLargeParams/MyTestForBig.largeParamsSucceed/1 (0 ms)
[----------] 2 tests from testLargeParams/MyTestForBig (0 ms total)
[----------] 4 tests from allKindsOfParams/MyTestBase
[ RUN ] allKindsOfParams/MyTestBase.someGeneralTest/0
[ OK ] allKindsOfParams/MyTestBase.someGeneralTest/0 (0 ms)
[ RUN ] allKindsOfParams/MyTestBase.someGeneralTest/1
[ OK ] allKindsOfParams/MyTestBase.someGeneralTest/1 (0 ms)
[ RUN ] allKindsOfParams/MyTestBase.someGeneralTest/2
[ OK ] allKindsOfParams/MyTestBase.someGeneralTest/2 (0 ms)
[ RUN ] allKindsOfParams/MyTestBase.someGeneralTest/3
[ OK ] allKindsOfParams/MyTestBase.someGeneralTest/3 (0 ms)
[----------] 4 tests from allKindsOfParams/MyTestBase (0 ms total)
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