def test_init_missing_values(self):
with pytest.raises(TypeError):
DataPoint()
def test_init_too_many_values(self):
with pytest.raises(TypeError):
DataPoint(1, 2, 3)
def test_init(self):
p = DataPoint(1, 2)
assert p == (1, 2)
assert p.index == 1
assert p.value == 2