def test_xy_adder_active(self):
"""
_xy_adder() adds proper arguments
"""
# set up mock parser
parser = MagicMock()
parser.add_argument = MagicMock()
# create a list of expected call signatures
calls = []
msg = 'Column to plot on x-axis'
calls.append(call('-x', nargs=1, type=str, dest='x', metavar='col',
help=msg))
msg = 'List of columns to plot on y-axis'
calls.append(call('-y', nargs='+', type=str, dest='y',
metavar='col', help=msg))
msg = "Plot style(s) defaults to .-"
calls.append(call('-s', '--style', nargs='+', type=str, dest='style',
default=['.-'], help=msg, metavar='style'))
# run the code under test
args = ['xy_plotting']
arg_lib._xy_adder(parser, *args)
# make sure proper calls were made
self.assertEqual(parser.add_argument.call_args_list, calls)
def test_xy_adder_inactive(self):
"""
_xy_adder() doesn't do anything when xy_plotting not specified
"""
parser = MagicMock()
parser.add_argument = MagicMock()
args = []
arg_lib._xy_adder(parser, *args)
self.assertFalse(parser.add_argument.called)
