def test_add_donor():
dl = Donorlist(init_tuple)
dl.add_donor('Gene Shallit')
assert 'Gene Shallit' in dl.list_donors()
assert isinstance(dl.get_donor('Gene Shallit'), Donor)
assert dl.list_donations('Gene Shallit') == []
with pytest.raises(ValueError):
dl.add_donor('Tom Selleck')
def test_get_donor():
dl = Donorlist(init_tuple)
d = dl.get_donor('Tom Selleck')
assert isinstance(d, Donor)
assert d.name == 'Tom Selleck'
assert d.donations == [2000.00, 1500.00, 500.00]