def but_it_raises_zero_division_error_when_scalefactor_is_0(
self, dimensions_):
"""Considering the teset above, this one prove that a wrong behaviour of the
user can cause a zerodivision error. In this case the scale_factor=0 generates
the ZeroDivision Exception
"""
dimensions_.return_value = (300, 500)
slide = Slide("/a/b/foo", "processed")
with pytest.raises(ZeroDivisionError) as err:
slide._resampled_dimensions(scale_factor=0)
assert isinstance(err.value, ZeroDivisionError)
assert str(err.value) == "division by zero"
def it_knows_its_resampled_dimensions(self, dimensions_):
"""This test prove that given the dimensions (mock object here), it does
the correct maths operations:
`large_w, large_h = self.dimensions`
`new_w = math.floor(large_w / self._scale_factor)`
`new_h = math.floor(large_h / self._scale_factor)`
`return large_w, large_h, new_w, new_h`
"""
dimensions_.return_value = (300, 500)
slide = Slide("/a/b/foo", "processed")
_resampled_dims = slide._resampled_dimensions(scale_factor=32)
assert _resampled_dims == (300, 500, 9, 15)
