def it_can_resample_itself(self, tmpdir, resampled_dims_):
tmp_path_ = tmpdir.mkdir("myslide")
image = PILIMG.RGBA_COLOR_500X500_155_249_240
image.save(os.path.join(tmp_path_, "mywsi.png"), "PNG")
slide_path = os.path.join(tmp_path_, "mywsi.png")
slide = Slide(slide_path, "processed")
resampled_dims_.return_value = (100, 200, 300, 400)
_resample = slide._resample(32)
# image array assertions
assert type(_resample[1]) == np.ndarray
# ---The np array shape should be (new_h X new_w X channels),---
# ---in this case (look at resampled_dims mock) the new_h is 400---
# ---the new_w is 300 and the color channels of the image are 3---
assert _resample[1].shape == (400, 300, 3)
# ---Here we prove that the 3 channels are compliant with the color---
# ---definition and that each channel is a np.array (400x300) filled---
# ---with the related color expressed during the image creation---
np.testing.assert_almost_equal(_resample[1][:, :, 0],
np.full((400, 300), 155))
np.testing.assert_almost_equal(_resample[1][:, :, 1],
np.full((400, 300), 249))
np.testing.assert_almost_equal(_resample[1][:, :, 2],
np.full((400, 300), 240))
# PIL image assertions
assert type(_resample[0]) == PIL.Image.Image
assert _resample[0].size == (300, 400)
assert _resample[0].width == 300
assert _resample[0].height == 400
assert _resample[0].mode == "RGB"
def it_resamples_with_the_correct_scale_factor(self, tmpdir,
resampled_dims_):
tmp_path_ = tmpdir.mkdir("myslide")
image = PILIMG.RGBA_COLOR_500X500_155_249_240
image.save(os.path.join(tmp_path_, "mywsi.png"), "PNG")
slide_path = os.path.join(tmp_path_, "mywsi.png")
slide = Slide(slide_path, "processed")
resampled_dims_.return_value = (500, 500, 15, 15)
_resample = slide._resample(32)
assert _resample[1].shape == (math.floor(500 / 32),
math.floor(500 / 32), 3)