def test_value_error():
with pytest.raises(TypeError):
distance(None)
def test_typical():
assert round(distance(2, 3, 10, 8), 4) == 9.434
def test_type_error():
with pytest.raises(TypeError):
distance('aoeu')
def test_order():
assert distance(1, 2, 3, 4) == distance(3, 4, 1, 2)
def test_horizontal_distance():
assert distance(0, 0, 10, 0) == 10
def test_vertical_distance():
assert distance(0, 5, 0, 0) == 5
def test_negative_coordinates():
assert round(distance(-2, -3, -10, 8), 4) == 13.6015
def test_zero_length():
assert distance(1, 1, 1, 1) == 0