def test_combine_strings_num_combinations(strings):
combinations = mixemup.combine_strings(strings)
num_combinations = sum(1 for c in combinations)
expected_length = 0
for i in range(num_combinations + 1):
expected_length += sum(1 for i in itertools.combinations(strings, i))
assert num_combinations == expected_length
def test_combine_strings_max_parts_negative():
strings = ["a", "b", "c"]
with pytest.raises(ValueError):
next(mixemup.combine_strings(strings, max_parts=-1))
def test_combine_strings_max_parts_zero():
strings = ["a", "b", "c"]
combinations = list(mixemup.combine_strings(strings, max_parts=0))
assert combinations[-1] == ""
def test_combine_strings_max_parts_in_range(max_parts):
strings = ["a", "b", "c"]
combinations = list(mixemup.combine_strings(strings, max_parts=max_parts))
assert len(combinations[-1].split(" ")) == max_parts
def test_combine_strings_delimiter(delimiter):
strings = ["a", "b", "c"]
combinations_custom = mixemup.combine_strings(strings, delimiter)
combinations_default = mixemup.combine_strings(strings)
for custom, default in zip(combinations_custom, combinations_default):
assert custom.split(delimiter) == default.split(" ")