Pillow/Tests/test_imageshow.py

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import pytest
from PIL import Image, ImageShow
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from .helper import hopper, is_win32, on_ci
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def test_sanity():
dir(Image)
dir(ImageShow)
def test_register():
# Test registering a viewer that is not a class
ImageShow.register("not a class")
# Restore original state
ImageShow._viewers.pop()
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@pytest.mark.parametrize(
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"order",
[-1, 0],
)
def test_viewer_show(order):
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class TestViewer(ImageShow.Viewer):
def show_image(self, image, **options):
self.methodCalled = True
return True
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viewer = TestViewer()
ImageShow.register(viewer, order)
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for mode in ("1", "I;16", "LA", "RGB", "RGBA"):
viewer.methodCalled = False
with hopper(mode) as im:
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assert ImageShow.show(im)
assert viewer.methodCalled
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# Restore original state
ImageShow._viewers.pop(0)
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@pytest.mark.skipif(
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not on_ci() or is_win32(),
reason="Only run on CIs; hangs on Windows CIs",
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)
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@pytest.mark.parametrize("mode", ("1", "I;16", "LA", "RGB", "RGBA"))
def test_show(mode):
im = hopper(mode)
assert ImageShow.show(im)
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def test_show_without_viewers():
viewers = ImageShow._viewers
ImageShow._viewers = []
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with hopper() as im:
assert not ImageShow.show(im)
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ImageShow._viewers = viewers
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def test_viewer():
viewer = ImageShow.Viewer()
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assert viewer.get_format(None) is None
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with pytest.raises(NotImplementedError):
viewer.get_command(None)
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@pytest.mark.parametrize("viewer", ImageShow._viewers)
def test_viewers(viewer):
try:
viewer.get_command("test.jpg")
except NotImplementedError:
pass
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def test_ipythonviewer():
pytest.importorskip("IPython", reason="IPython not installed")
for viewer in ImageShow._viewers:
if isinstance(viewer, ImageShow.IPythonViewer):
test_viewer = viewer
break
else:
pytest.fail()
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im = hopper()
assert test_viewer.show(im) == 1