def test_get_serial_by_id():
"""Test serial by id conversion."""
p1 = patch("os.path.isdir", MagicMock(return_value=True))
p2 = patch("os.scandir")
def _realpath(path):
if path is sentinel.matched_link:
return sentinel.path
return sentinel.serial_link_path
p3 = patch("os.path.realpath", side_effect=_realpath)
with p1 as is_dir_mock, p2 as scan_mock, p3:
res = usb.get_serial_by_id(sentinel.path)
assert res is sentinel.path
assert is_dir_mock.call_count == 1
assert scan_mock.call_count == 1
entry1 = MagicMock(spec_set=os.DirEntry)
entry1.is_symlink.return_value = True
entry1.path = sentinel.some_path
entry2 = MagicMock(spec_set=os.DirEntry)
entry2.is_symlink.return_value = False
entry2.path = sentinel.other_path
entry3 = MagicMock(spec_set=os.DirEntry)
entry3.is_symlink.return_value = True
entry3.path = sentinel.matched_link
scan_mock.return_value = [entry1, entry2, entry3]
res = usb.get_serial_by_id(sentinel.path)
assert res is sentinel.matched_link
assert is_dir_mock.call_count == 2
assert scan_mock.call_count == 2
def test_get_serial_by_id_no_dir():
"""Test serial by id conversion if there's no /dev/serial/by-id."""
p1 = patch("os.path.isdir", MagicMock(return_value=False))
p2 = patch("os.scandir")
with p1 as is_dir_mock, p2 as scan_mock:
res = usb.get_serial_by_id(sentinel.path)
assert res is sentinel.path
assert is_dir_mock.call_count == 1
assert scan_mock.call_count == 0
def get_usb_ports() -> dict[str, str]:
"""Return a dict of USB ports and their friendly names."""
ports = list_ports.comports()
port_descriptions = {}
for port in ports:
usb_device = usb.usb_device_from_port(port)
dev_path = usb.get_serial_by_id(usb_device.device)
human_name = usb.human_readable_device_name(
dev_path,
usb_device.serial_number,
usb_device.manufacturer,
usb_device.description,
usb_device.vid,
usb_device.pid,
)
port_descriptions[dev_path] = human_name
return port_descriptions