Type Tests in namespace are put in anonymous namespace if name generator does not start with digit

[DominikGrabiec]

Google Test TYPED_TESTs which are defined in a namespace are instead put into the anonymous namespace in the Test Explorer list if a custom name generator is provided which generates names not starting with a digit.

Without a name generator:

#include <gtest/gtest.h>
#include <string>

namespace example
{
template <typename T> struct TestSuite : public ::testing::Test {};
using TestTypes = ::testing::Types<int, float>;
TYPED_TEST_SUITE(TestSuite, TestTypes);
TYPED_TEST(TestSuite, test_zero){}
TYPED_TEST(TestSuite, test_one){}
}

You end up with integers for the test type names but the tests end up in the correct namespace:

Adding a name generator with simple names:

#include <gtest/gtest.h>
#include <string>

namespace example
{
class NameGenerator
{
public:
	template <typename T> static std::string GetName(int i)
	{
		if constexpr (std::is_same_v<T, int>) return "int";
		if constexpr (std::is_same_v<T, float>) return "float";
	}
};

template <typename T> struct TestSuite : public ::testing::Test{};
using TestTypes = ::testing::Types<int, float>;
TYPED_TEST_SUITE(TestSuite, TestTypes, NameGenerator);
TYPED_TEST(TestSuite, test_zero){}
TYPED_TEST(TestSuite, test_one){}
}

You end up with nicer test type names but the tests end up in the anonymous namespace:

Changing the name generator to start with a digit:

#include <gtest/gtest.h>
#include <string>

namespace example
{
class NameGenerator
{
public:
	template <typename T> static std::string GetName(int i)
	{
		if constexpr (std::is_same_v<T, int>) return "0_int";
		if constexpr (std::is_same_v<T, float>) return "0_float";
	}
};

template <typename T> struct TestSuite : public ::testing::Test{};
using TestTypes = ::testing::Types<int, float>;
TYPED_TEST_SUITE(TestSuite, TestTypes, NameGenerator);
TYPED_TEST(TestSuite, test_zero){}
TYPED_TEST(TestSuite, test_one){}
}

Which ends up with somewhat more correct naming, but it shouldn't be necessary.