def test_write_leadin_with_object_without_data(self):
channel = TestObject(path="", has_data=False)
toc = ["kTocMetaData", "kTocRawData", "kTocNewObjList"]
metadata_size = 12
segment = TdmsSegment([channel])
leadin = segment.leadin(toc, metadata_size)
expected_values = [
Bytes(b'TDSm'),
Int32(14), # TOC bitmask
Int32(4712), # TDMS version
Uint64(12), # Next segment offset
Uint64(12), # Raw data offset
]
self.assert_sequence_equal(leadin, expected_values)
def test_write_leadin_with_one_channel():
data_type = StubObject(size=4)
channel = StubObject(path="",
has_data=True,
data=[0] * 10,
data_type=data_type)
toc = ["kTocMetaData", "kTocRawData", "kTocNewObjList"]
metadata_size = 12
segment = TdmsSegment([channel])
leadin = segment.leadin(toc, metadata_size)
expected_values = [
Bytes(b'TDSm'),
Int32(14), # TOC bitmask
Int32(4712), # TDMS version
Uint64(52), # Next segment offset
Uint64(12), # Raw data offset
]
_assert_sequence_equal(leadin, expected_values)