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7 changes: 4 additions & 3 deletions testgres/helpers/port_manager.py
Original file line number Diff line number Diff line change
Expand Up @@ -26,10 +26,11 @@ def find_free_port(self, ports: Optional[Set[int]] = None, exclude_ports: Option
if ports is None:
ports = set(range(1024, 65535))

if exclude_ports is None:
exclude_ports = set()
assert type(ports) == set # noqa: E721

ports.difference_update(set(exclude_ports))
if exclude_ports is not None:
assert isinstance(exclude_ports, Iterable)
ports.difference_update(exclude_ports)

sampled_ports = random.sample(tuple(ports), min(len(ports), 100))

Expand Down