Tamara Dahlgren 61baa40160 bugfix: ensure spack test list still works (#22203) ... Was getting the following error: ``` $ spack test list ==> Error: issubclass() arg 1 must be a class ``` This PR adds a check in `has_test_method` (in case it is re-used elsewhere such as #22097) and ensures a class is passed to the method from `spack test list`.		2021-03-12 09:56:17 -08:00
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spack	bugfix: ensure spack test list still works (#22203)	2021-03-12 09:56:17 -08:00