understand macro cxx_test

pub/utest/cmake/utils.cmake

@@ -192,8 +192,7 @@ endfunction()
 # from the given source files.  dir/name.cc is implicitly included in
 # the source file list.
 function(cxx_executable name dir libs)
-  cxx_executable_with_flags(
-    ${name} "${cxx_default}" "${libs}" "${dir}/${name}.cpp" ${ARGN})
+  cxx_executable_with_flags(${name} "${cxx_default}" "${libs}" "${dir}/${name}.cpp" ${ARGN})
 endfunction()
 
 # Sets PYTHONINTERP_FOUND and PYTHON_EXECUTABLE.
@@ -210,12 +209,11 @@ endfunction()
 
 # cxx_test(name libs srcs...)
 #
-# creates a named test target that depends on the given libs and is
-# built from the given source files.  Unlike cxx_test_with_flags,
-# test/name.cc is already implicitly included in the source file list.
+# creates a named test target that depends on the given libs.
+# The source file name is constructed from he given target name.
+# Btw: "${ARGN} holds the list of arguments past the last expected argument."
 function(cxx_test name libs)
-  cxx_test_with_flags("${name}" "${cxx_default}" "${libs}"
-    "./${name}.cpp" ${ARGN})
+  cxx_test_with_flags("${name}" "${cxx_default}" "${libs}" "./${name}.cpp" ${ARGN})
 endfunction()
 
 # py_test(name)