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64 lines
1.5 KiB
Python
64 lines
1.5 KiB
Python
from io import BytesIO
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import pytest
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from PIL import FitsStubImagePlugin, Image
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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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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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FitsStubImagePlugin.FITSStubImageFile(invalid_file)
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def test_load():
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# Arrange
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with Image.open(TEST_FILE) as im:
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# Act / Assert: stub cannot load without an implemented handler
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with pytest.raises(OSError):
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im.load()
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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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FitsStubImagePlugin.FITSStubImageFile(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_save():
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# Arrange
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with Image.open(TEST_FILE) as im:
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dummy_fp = None
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dummy_filename = "dummy.filename"
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# Act / Assert: stub cannot save without an implemented handler
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with pytest.raises(OSError):
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im.save(dummy_filename)
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with pytest.raises(OSError):
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FitsStubImagePlugin._save(im, dummy_fp, dummy_filename)
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