def it_can_write_a_list_of_parts(self):
# mockery ----------------------
phys_writer = Mock(name='phys_writer')
rels = MagicMock(name='rels')
rels.__len__.return_value = 1
part1 = Mock(name='part1', _rels=rels)
part2 = Mock(name='part2', _rels=[])
# exercise ---------------------
PackageWriter._write_parts(phys_writer, [part1, part2])
# verify -----------------------
expected_calls = [
call(part1.partname, part1.blob),
call(part1.partname.rels_uri, part1._rels.xml),
call(part2.partname, part2.blob),
]
assert phys_writer.write.mock_calls == expected_calls
