tweak on bad cases

Author: yucongalicechen

src/diffpy/labpdfproc/tests/test_tools.py

@@ -183,7 +183,7 @@ def test_set_wavelength_bad(inputs, msg):
     cli_inputs = ["2.5", "data.xy"] + inputs
     actual_args = get_args(cli_inputs)
     with pytest.raises(ValueError, match=re.escape(msg[0])):
-        actual_args.wavelength = set_wavelength(actual_args)
+        actual_args = set_wavelength(actual_args)
 
 
 params5 = [