def test__pop_legend_kwarg_error(keys):
kws = dict(zip(keys, range(len(keys))))
with pytest.raises(ValueError):
bph._pop_legend_kwarg(kws)
def test__pop_legend_kwarg(key):
kws = {'foo': 10, key: 'bar'}
assert bph._pop_legend_kwarg(kws) == {key: "bar"}