def test_no_waveform_sequence(self):
"""Test that missing waveform sequence raises exception."""
ds = dcmread(ECG)
del ds.WaveformSequence
msg = (
r"No \(5400,0100\) Waveform Sequence element found in the dataset")
gen = generate_multiplex(ds)
with pytest.raises(AttributeError, match=msg):
next(gen)
def test_unsupported_syntax_raises(self):
"""Test that an unsupported syntax raises exception."""
ds = dcmread(ECG)
ds.file_meta.TransferSyntaxUID = '1.2.3.4'
msg = (r"Unable to convert the waveform data as the transfer syntax "
r"is not supported by the waveform data handler")
gen = generate_multiplex(ds)
with pytest.raises(NotImplementedError, match=msg):
next(gen)
def test_not_as_raw(self):
"""Test that as_raw=False works as expected."""
ds = dcmread(ECG)
gen = generate_multiplex(ds, as_raw=False)
arr = next(gen)
assert [100, 81.25, 62.5, 43.75, 46.25] == arr[0:5, 0].tolist()
assert [112.5, 106.25, 100, 93.75, 96.25] == arr[0:5, 1].tolist()
assert arr.dtype == 'float'
assert arr.flags.writeable
assert (10000, 12) == arr.shape
def test_as_raw(self):
"""Test that as_raw=True works as expected."""
ds = dcmread(ECG)
gen = generate_multiplex(ds, as_raw=True)
arr = next(gen)
assert [80, 65, 50, 35, 37] == arr[0:5, 0].tolist()
assert [90, 85, 80, 75, 77] == arr[0:5, 1].tolist()
assert arr.dtype == 'int16'
assert arr.flags.writeable
assert (10000, 12) == arr.shape
def test_missing_required(self):
"""Test that missing required element in sequence raises exception."""
ds = dcmread(ECG)
item = ds.WaveformSequence[0]
del item.NumberOfWaveformSamples
msg = (f"Unable to convert the waveform multiplex group with index "
f"0 as the following required elements are missing from "
f"the sequence item: NumberOfWaveformSamples")
gen = generate_multiplex(ds)
with pytest.raises(AttributeError, match=msg):
next(gen)