cmake: use test names instead of full paths

The primary purpose of Git's CMake definition is to allow developing Git
in Visual Studio. As part of that, the CTest feature allows running
individual test scripts conveniently in Visual Studio's Test Explorer.

However, this Test Explorer's design targets object-oriented languages
and therefore expects the test names in the form
`<namespace>.<class>.<testname>`. And since we specify the full path
of the test scripts instead, including the ugly `/.././t/` part, these
dots confuse the Test Explorer and it uses a large part of the path as
"namespace".

Let's just use `t.<name>` instead. This still adds an ugly "Empty
Namespace" layer by default, but at least the ugly absolute path is now
gone.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

contrib/buildsystems/CMakeLists.txt

@@ -1106,13 +1106,14 @@ file(GLOB test_scripts "${CMAKE_SOURCE_DIR}/t/t[0-9]*.sh")
 
 #test
 foreach(tsh ${test_scripts})
-	add_test(NAME ${tsh}
+	string(REGEX REPLACE ".*/(.*)\\.sh" "\\1" test_name ${tsh})
+	add_test(NAME "t.${test_name}"
 		COMMAND ${SH_EXE} ${tsh} --no-bin-wrappers --no-chain-lint -vx
 		WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}/t)
 endforeach()
 
 # This test script takes an extremely long time and is known to time out even
 # on fast machines because it requires in excess of one hour to run
-set_tests_properties("${CMAKE_SOURCE_DIR}/t/t7112-reset-submodule.sh" PROPERTIES TIMEOUT 4000)
+set_tests_properties("t.t7112-reset-submodule" PROPERTIES TIMEOUT 4000)
 
 endif()#BUILD_TESTING