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import os
import tempfile
import unittest
from io import BytesIO
import odil
class TestReader(unittest.TestCase):
def test_constructor(self):
stream = odil.iostream(BytesIO())
reader = odil.Reader(stream, odil.registry.ImplicitVRLittleEndian)
self.assertEqual(
reader.transfer_syntax.encode(),
odil.registry.ImplicitVRLittleEndian)
self.assertEqual(reader.byte_ordering, odil.ByteOrdering.LittleEndian)
self.assertFalse(reader.explicit_vr)
self.assertFalse(reader.keep_group_length)
def test_constructor_no_default(self):
stream = odil.iostream(BytesIO())
reader = odil.Reader(stream, odil.registry.ExplicitVRBigEndian, True)
self.assertEqual(
reader.transfer_syntax.encode(), odil.registry.ExplicitVRBigEndian)
self.assertEqual(reader.byte_ordering, odil.ByteOrdering.BigEndian)
self.assertTrue(reader.explicit_vr)
self.assertTrue(reader.keep_group_length)
def test_read_data_set(self):
string_io = BytesIO(
b"\x10\x00\x10\x00PN\x07\x00Foo^Bar"
b"\x10\x00\x20\x00CS\x03\x00FOO"
)
stream = odil.iostream(string_io)
reader = odil.Reader(stream, odil.registry.ExplicitVRLittleEndian)
data_set = reader.read_data_set()
self.assertEqual(data_set.size(), 2)
self.assertSequenceEqual(data_set.as_string("PatientName"), [b"Foo^Bar"])
self.assertSequenceEqual(data_set.as_string("PatientID"), [b"FOO"])
def test_read_data_set_halt_condition(self):
string_io = BytesIO(
b"\x10\x00\x10\x00" b"PN" b"\x08\x00" b"Foo^Bar "
b"\x10\x00\x20\x00" b"LO" b"\x04\x00" b"FOO "
)
stream = odil.iostream(string_io)
reader = odil.Reader(stream, odil.registry.ExplicitVRLittleEndian)
data_set = reader.read_data_set(lambda x: x==odil.registry.PatientID)
self.assertEqual(data_set.size(), 1)
self.assertSequenceEqual(data_set.as_string("PatientName"), [b"Foo^Bar"])
def test_read_tag(self):
string_io = BytesIO(b"\x10\x00\x20\x00")
stream = odil.iostream(string_io)
reader = odil.Reader(stream, odil.registry.ExplicitVRLittleEndian)
self.assertEqual(reader.read_tag(), odil.registry.PatientID)
def test_read_length(self):
string_io = BytesIO(b"\x34\x12")
stream = odil.iostream(string_io)
reader = odil.Reader(stream, odil.registry.ExplicitVRLittleEndian)
self.assertEqual(reader.read_length(odil.VR.CS), 0x1234)
def test_read_element(self):
string_io = BytesIO(b"PN\x08\x00Foo^Bar ")
stream = odil.iostream(string_io)
reader = odil.Reader(stream, odil.registry.ExplicitVRLittleEndian)
self.assertEqual(
reader.read_element(odil.registry.PatientName),
odil.Element([b"Foo^Bar"], odil.VR.PN))
def test_read_file_stream(self):
data = (
128*b"\x00"+b"DICM"+
b"\x02\x00\x10\x00" b"UI" b"\x14\x00" b"1.2.840.10008.1.2.1\x00"
b"\x10\x00\x10\x00" b"PN" b"\x08\x00" b"Foo^Bar "
)
string_io = BytesIO(data)
stream = odil.iostream(string_io)
header, data_set = odil.Reader.read_file(stream)
self.assertEqual(len(header), 1)
self.assertSequenceEqual(
header.as_string("TransferSyntaxUID"),
[odil.registry.ExplicitVRLittleEndian])
self.assertEqual(len(data_set), 1)
self.assertSequenceEqual(data_set.as_string("PatientName"), [b"Foo^Bar"])
def test_read_file_path(self):
data = (
128*b"\x00"+b"DICM"+
b"\x02\x00\x10\x00" b"UI" b"\x14\x00" b"1.2.840.10008.1.2.1\x00"
b"\x10\x00\x10\x00" b"PN" b"\x08\x00" b"Foo^Bar "
)
fd, path = tempfile.mkstemp()
os.write(fd, data)
os.close(fd)
try:
header, data_set = odil.Reader.read_file(path)
finally:
os.remove(path)
self.assertEqual(len(header), 1)
self.assertSequenceEqual(
header.as_string("TransferSyntaxUID"),
[odil.registry.ExplicitVRLittleEndian])
self.assertEqual(len(data_set), 1)
self.assertSequenceEqual(data_set.as_string("PatientName"), [b"Foo^Bar"])
def test_open_context(self):
data = (
128*b"\x00"+b"DICM"+
b"\x02\x00\x10\x00" b"UI" b"\x14\x00" b"1.2.840.10008.1.2.1\x00"
b"\x10\x00\x10\x00" b"PN" b"\x08\x00" b"Foo^Bar "
)
fd, path = tempfile.mkstemp()
os.write(fd, data)
os.close(fd)
try:
with odil.open(path) as fd:
header, data_set = odil.Reader.read_file(fd)
finally:
os.remove(path)
if __name__ == "__main__":
unittest.main()
|
