def test_file_url_not_found():
data_filename = "data/cmu_small_region_broken.svs"
with pytest.raises(HTTPError) as err:
_fetch(data_filename)
assert (
str(err.value) == f"404 Client Error: Not Found for url: "
f"https://github.com/histolab/histolab/raw/{v}/histolab/{data_filename}"
)
def it_raises_error_on_fetch_if_image_fetcher_is_None():
with pytest.raises(ModuleNotFoundError) as err:
_fetch("data/cmu_small_region.svs")
assert (
str(err.value) ==
"The requested file is part of the histolab distribution, but requires the "
"installation of an optional dependency, pooch. To install pooch, use your "
"preferred python package manager. Follow installation instruction found at "
"https://www.fatiando.org/pooch/latest/install.html")
def test_download_file_from_internet():
# NOTE: This test will be skipped when internet connection is not available
fetch("histolab/kidney.png")
kidney_path = _fetch("histolab/kidney.png")
kidney_image = np.array(PIL.Image.open(kidney_path))
assert kidney_image.shape == (537, 809, 4)
def fetch(data_filename):
"""Attempt to fetch data, but if unavailable, skip the tests."""
try:
return data._fetch(data_filename)
except (ConnectionError, ModuleNotFoundError):
pytest.skip(f"Unable to download {data_filename}")