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86 lines
2.0 KiB
Python
86 lines
2.0 KiB
Python
from io import BytesIO
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import pytest
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from PIL import FitsImagePlugin, FitsStubImagePlugin, Image
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from .helper import assert_image_equal, hopper
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TEST_FILE = "Tests/images/hopper.fits"
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def test_open():
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# Act
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with Image.open(TEST_FILE) as im:
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# Assert
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assert im.format == "FITS"
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assert im.size == (128, 128)
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assert im.mode == "L"
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assert_image_equal(im, hopper("L"))
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def test_invalid_file():
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# Arrange
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invalid_file = "Tests/images/flower.jpg"
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# Act / Assert
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with pytest.raises(SyntaxError):
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FitsImagePlugin.FitsImageFile(invalid_file)
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def test_truncated_fits():
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# No END to headers
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image_data = b"SIMPLE = T" + b" " * 50 + b"TRUNCATE"
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with pytest.raises(OSError):
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FitsImagePlugin.FitsImageFile(BytesIO(image_data))
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def test_naxis_zero():
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# This test image has been manually hexedited
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# to set the number of data axes to zero
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with pytest.raises(ValueError):
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with Image.open("Tests/images/hopper_naxis_zero.fits"):
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pass
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def test_comment():
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image_data = b"SIMPLE = T / comment string"
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with pytest.raises(OSError):
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FitsImagePlugin.FitsImageFile(BytesIO(image_data))
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def test_stub_deprecated():
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class Handler:
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opened = False
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loaded = False
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def open(self, im):
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self.opened = True
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def load(self, im):
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self.loaded = True
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return Image.new("RGB", (1, 1))
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handler = Handler()
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with pytest.warns(DeprecationWarning):
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FitsStubImagePlugin.register_handler(handler)
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with Image.open(TEST_FILE) as im:
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assert im.format == "FITS"
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assert im.size == (128, 128)
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assert im.mode == "L"
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assert handler.opened
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assert not handler.loaded
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im.load()
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assert handler.loaded
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FitsStubImagePlugin._handler = None
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Image.register_open(
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FitsImagePlugin.FitsImageFile.format,
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FitsImagePlugin.FitsImageFile,
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FitsImagePlugin._accept,
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)
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