The new feature in this recipe is the add_catch_test macro. The macro expects two arguments, _name and _cost, and we can use these arguments inside the macro to call add_test and set_tests_properties. The leading underscores are our choice, but with this we indicate to the reader that these arguments have local scope and can only be accessed within the macro. Also, note that the macro automatically populates ${ARGC} (number of arguments) and ${ARGV} (list of arguments), and we verified this in the output:
-- add_catch_test called with 2 arguments: short;1.5-- add_catch_test called with 3 arguments: long;2.5;extra_argument
The macro also defines ${ARGN}, which holds the list of arguments past the last expected argument. In addition, ...
