def test_check_kwargs_missing(self):
"""Test _check_kwargs"""
enc = Encoder(RLELossless)
kwargs = {
'rows': 0,
'columns': 0,
'samples_per_pixel': 0,
'bits_allocated': 0,
'bits_stored': 0,
'pixel_representation': 0,
'number_of_frames': 0,
'photometric_interpretation': 'RGB'
}
assert enc._check_kwargs(kwargs) is None
del kwargs['columns']
del kwargs['bits_allocated']
msg = r"Missing expected arguments: 'columns', 'bits_allocated'"
with pytest.raises(TypeError, match=msg):
enc._check_kwargs(kwargs)
def test_kwargs_from_ds(self):
"""Test Encoder.kwargs_from_ds()"""
# Note no NumberOfFrames element
ds = Dataset()
ds.Rows = 10
ds.Columns = 12
ds.SamplesPerPixel = 1
ds.BitsAllocated = 8
ds.BitsStored = 8
ds.PixelRepresentation = 0
ds.PhotometricInterpretation = 'RGB'
enc = Encoder(RLELossless)
kwargs = enc.kwargs_from_ds(ds)
assert 1 == kwargs['number_of_frames']
assert enc._check_kwargs(kwargs) is None
# Test conversion of empty *Number of Frames*
ds.NumberOfFrames = None
kwargs = enc.kwargs_from_ds(ds)
assert 1 == kwargs['number_of_frames']
# Test already present *Number of Frames* is unaffected
ds.NumberOfFrames = 10
kwargs = enc.kwargs_from_ds(ds)
assert 10 == kwargs['number_of_frames']
# Test missing elements
del ds.Columns
del ds.BitsAllocated
msg = (
r"The following required elements are missing from the dataset: "
r"'Columns', 'BitsAllocated'")
with pytest.raises(AttributeError, match=msg):
enc.kwargs_from_ds(ds)
# Test VM 0
ds.Columns = None
ds.BitsAllocated = None
msg = (r"The following required dataset elements have a VM of 0: "
r"'Columns', 'BitsAllocated'")
with pytest.raises(AttributeError, match=msg):
enc.kwargs_from_ds(ds)