How to name test suite properly when using parametrized tests

[fsinisi90]

I noticed that is not possible to use the same suite name when creating multiple parametrized test suites with different input types. Let me illustrate it with a simple example:

class StandardStringTest : public testing::TestWithParam<std::string> {};

TEST_F(StandardStringTest, Split)
{
	std::string str = "Here I use a fixed input";
	ASSERT_TRUE(true);
}

TEST_P(StandardStringTest, Concatenate)
{
	std::string str = GetParam(); // here I use parametrized string input
	ASSERT_TRUE(true);
}

INSTANTIATE_TEST_SUITE_P(,
	StandardStringTest,
	testing::Values("value1", "value2"));

class StandardStringTest : public testing::TestWithParam<int> {};

TEST_P(StandardStringTest, FromNumber)
{
	int i = GetParam(); // here I use parametrized integer input
	ASSERT_TRUE(true);
}

INSTANTIATE_TEST_SUITE_P(,
	StandardStringTest,
	testing::Values(1, 2, 3, 4));

Of course, this won't compile. I can't use the same name for the two parametrized suites because the classes will collide. And if I use a different name, the tests won't be grouped (note that the Split test defined with TEST_F can be grouped):

What is the correct way to solve this?

[fsinisi90]

One approach would be to use the prefix as the suite name. It won't group them, but at least they will start with the same name.

TEST(StandardStringTest, Split)
{
	std::string str = "Here I use a fixed input";
	ASSERT_TRUE(true);
}

class String : public testing::TestWithParam<std::string> {};

TEST_P(String, Concatenate)
{
	std::string str = GetParam(); // here I use parametrized string input
	ASSERT_TRUE(true);
}

INSTANTIATE_TEST_SUITE_P(StandardStringTest,
	String,
	testing::Values("value1", "value2"));

class Number : public testing::TestWithParam<int> {};

TEST_P(Number, FromNumber)
{
	int i = GetParam(); // here I use parametrized integer input
	ASSERT_TRUE(true);
}

INSTANTIATE_TEST_SUITE_P(StandardStringTest,
	Number,
	testing::Values(1, 2, 3, 4));