将数组传递给gtest中的参数化测试

问题描述

gtest中的参数化测试可让您使用不同的参数测试代码，而无需编写同一测试的多个副本。seen here

我看到了传递值的示例，例如std :: pair，std :: tuple等。

但是我不确定如何将数组/ initializer_list传递到测试中。

预期如下：

$ sudo apt install nodejs
Reading package lists... Done
Building dependency tree       
Reading state @R_200_4045@ion... Done
The following packages will be upgraded:
  nodejs
1 upgraded,0 newly installed,0 to remove and 38 not upgraded.
Need to get 24.7 MB of archives.
After this operation,111 kB of additional disk space will be used.
Get:1 https://deb.nodesource.com/node_14.x focal/main amd64 nodejs amd64 14.8.0-deb-1nodesource1 [24.7 MB]
Fetched 24.7 MB in 20s (1,246 kB/s)                                            
(Reading database ... 155976 files and directories currently installed.)
Preparing to unpack .../nodejs_14.8.0-deb-1nodesource1_amd64.deb ...
Unpacking nodejs (14.8.0-deb-1nodesource1) over (14.7.0-deb-1nodesource1) ...
Setting up nodejs (14.8.0-deb-1nodesource1) ...
Processing triggers for man-db (2.9.1-1) ...

$ nodejs -v

Command 'nodejs' not found,but can be installed with:

sudo apt install nodejs

有可能吗？如果是，怎么办？

解决方法

您可以传递任何想要的类型作为参数。当您从类模板WithParamInterface（或TestWithParam）继承测试夹具a时，可以提供参数类型：

class FooTest: public TestWithParam<std::array<int,3>>
//class FooTest: public TestWithParam<std::vector<int>>
//class FooTest: public TestWithParam<std::initializer_list<int>> //I'm not sure if this is a good idea,initializer_list has weird lifetime management
{};

INSTANTIATE_TEST_SUITE_P(Sample,FooTest,testing::Values(std::array<int,3>{1,23,53},std::array<int,3>{534,34,456});

See it online。
您不能使用裸括号初始化列表并让编译器推断类型，因为::testing::Values()接受模板参数，并且编译器不知道该模板参数应变为哪种类型。

假设我们有class BarTest: public TestWithParam<std::string>。对于::testing::Values，我们可以传递实际的std :: string对象::testing::Values(std::string{"asdf"},"qwer"s)或隐式可转换为std :: string的对象，例如字符串文字：::testing::Values("zxcv")。后者将推断出类型为const char*，而实际的std :: string在GoogleTest代码中更深入地构造。

c++googlemock googletest qt