149 lines
3.9 KiB
Python
149 lines
3.9 KiB
Python
import numpy as np
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import skimage.data as data
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from skimage.data import image_fetcher
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from skimage import io
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from skimage._shared.testing import assert_equal, assert_almost_equal, fetch
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import os
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import pytest
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def test_data_dir():
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# data_dir should be a directory people can use as a standard directory
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# https://github.com/scikit-image/scikit-image/pull/3945#issuecomment-498141893
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data_dir = data.data_dir
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assert 'astronaut.png' in os.listdir(data_dir)
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def test_download_all_with_pooch():
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# jni first wrote this test with the intention of
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# fully deleting the files in the data_dir,
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# then ensure that the data gets downloaded accordingly.
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# hmaarrfk raised the concern that this test wouldn't
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# play well with parallel testing since we
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# may be breaking the global state that certain other
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# tests require, especially in parallel testing
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# The second concern is that this test essentially uses
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# alot of bandwidth, which is not fun for developers on
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# lower speed connections.
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# https://github.com/scikit-image/scikit-image/pull/4666/files/26d5138b25b958da6e97ebf979e9bc36f32c3568#r422604863
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data_dir = data.data_dir
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if image_fetcher is not None:
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data.download_all()
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assert len(os.listdir(data_dir)) > 50
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else:
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with pytest.raises(ModuleNotFoundError):
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data.download_all()
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def test_astronaut():
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""" Test that "astronaut" image can be loaded. """
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astronaut = data.astronaut()
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assert_equal(astronaut.shape, (512, 512, 3))
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def test_camera():
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""" Test that "camera" image can be loaded. """
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cameraman = data.camera()
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assert_equal(cameraman.ndim, 2)
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def test_checkerboard():
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""" Test that "checkerboard" image can be loaded. """
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data.checkerboard()
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def test_chelsea():
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""" Test that "chelsea" image can be loaded. """
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data.chelsea()
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def test_clock():
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""" Test that "clock" image can be loaded. """
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data.clock()
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def test_coffee():
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""" Test that "coffee" image can be loaded. """
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data.coffee()
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def test_horse():
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""" Test that "horse" image can be loaded. """
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horse = data.horse()
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assert_equal(horse.ndim, 2)
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assert_equal(horse.dtype, np.dtype('bool'))
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def test_hubble():
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""" Test that "Hubble" image can be loaded. """
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data.hubble_deep_field()
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def test_immunohistochemistry():
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""" Test that "immunohistochemistry" image can be loaded. """
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data.immunohistochemistry()
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def test_logo():
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""" Test that "logo" image can be loaded. """
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logo = data.logo()
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assert_equal(logo.ndim, 3)
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assert_equal(logo.shape[2], 4)
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def test_moon():
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""" Test that "moon" image can be loaded. """
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data.moon()
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def test_page():
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""" Test that "page" image can be loaded. """
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data.page()
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def test_rocket():
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""" Test that "rocket" image can be loaded. """
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data.rocket()
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def test_text():
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""" Test that "text" image can be loaded. """
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data.text()
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def test_stereo_motorcycle():
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""" Test that "stereo_motorcycle" image can be loaded. """
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data.stereo_motorcycle()
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def test_binary_blobs():
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blobs = data.binary_blobs(length=128)
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assert_almost_equal(blobs.mean(), 0.5, decimal=1)
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blobs = data.binary_blobs(length=128, volume_fraction=0.25)
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assert_almost_equal(blobs.mean(), 0.25, decimal=1)
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blobs = data.binary_blobs(length=32, volume_fraction=0.25, n_dim=3)
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assert_almost_equal(blobs.mean(), 0.25, decimal=1)
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other_realization = data.binary_blobs(length=32, volume_fraction=0.25,
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n_dim=3)
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assert not np.all(blobs == other_realization)
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def test_lfw_subset():
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""" Test that "lfw_subset" can be loaded."""
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data.lfw_subset()
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def test_cell():
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""" Test that "cell" image can be loaded."""
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data.cell()
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def test_cells_3d():
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"""Needs internet connection."""
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path = fetch('data/cells.tif')
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image = io.imread(path)
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assert image.shape == (60, 256, 256)
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