def test_cycle_u32_3s_1f_raises(self):
"""Test that 32-bit, 3 sample/px data raises exception."""
ds = dcmread(EXPL_32_3_1F)
ref = ds.pixel_array
assert ds.BitsAllocated == 32
assert ds.SamplesPerPixel == 3
enc = RLELosslessEncoder
kwargs = enc.kwargs_from_ds(ds)
msg = (
r"The 'gdcm' plugin is unable to RLE encode 32-bit, 3 samples/px "
r"data with GDCM v3.0.9 or older")
with pytest.raises(RuntimeError, match=msg):
gdcm_rle_encode(ds.PixelData, **kwargs)
def test_encoding_failure_raises(self):
"""Test that a encoding failure result raises an exception"""
kwargs = {
'rows': 1,
'columns': 1,
'samples_per_pixel': 1,
'bits_allocated': 8,
'bits_stored': 8,
'pixel_representation': 0,
'number_of_frames': 1,
'photometric_interpretation': 'PALETTE COLOR',
'transfer_syntax_uid': ExplicitVRLittleEndian,
}
msg = (r"An error occurred with the 'gdcm' plugin: "
r"unexpected number of fragments found in the 'Pixel Data'")
with pytest.raises(RuntimeError, match=msg):
gdcm_rle_encode(b'\x00', **kwargs)
def test_no_sequence_raises(self):
"""Test that no sequence of fragments raises an exception"""
kwargs = {
'rows': 1,
'columns': 1,
'samples_per_pixel': 1,
'bits_allocated': 8,
'bits_stored': 8,
'pixel_representation': 0,
'number_of_frames': 1,
'photometric_interpretation': 'PALETTE COLOR',
'transfer_syntax_uid': JPEG2000,
}
msg = (
r"An error occurred with the 'gdcm' plugin: "
r"ImageChangeTransferSyntax.Change\(\) returned a failure result")
with pytest.raises(RuntimeError, match=msg):
gdcm_rle_encode(b'\x00', **kwargs)
def test_invalid_photometric_interpretation_raises(self):
"""Test an invalid photometric interpretation raises exception"""
# Its either that or having to debug users getting segfaults
kwargs = {
'rows': 1,
'columns': 1,
'samples_per_pixel': 1,
'bits_allocated': 8,
'bits_stored': 8,
'pixel_representation': 0,
'number_of_frames': 1,
'photometric_interpretation': 'PALETTE_COLOR',
'transfer_syntax_uid': RLELossless,
}
msg = (
r"An error occurred with the 'gdcm' plugin: invalid photometric "
r"interpretation 'PALETTE_COLOR'")
with pytest.raises(ValueError, match=msg):
gdcm_rle_encode(b'\x00', **kwargs)