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Add test coverage for Linux default gateway parsing in netinfo

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Adds unit tests to `tests/test_netinfo.py` to cover the `_default_gateway` function
when `platform.system() == "Linux"`. This covers IPv4 and IPv6 routes, the lack
of a default route, and graceful `OSError` handling.

Co-authored-by: Horizontal42 <75383519+Horizontal42@users.noreply.github.com>
This commit is contained in:
google-labs-jules[bot] 2026-10-07 03:53:59 +00:00
parent 8c99ac78b7
commit c724ca47ae
1 changed files with 33 additions and 0 deletions
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33
tests/test_netinfo.py
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@ -231,6 +231,39 @@ Network Destination Netmask Gateway Interface Metric
def test_windows_default_gateway_returns_none_when_no_default_route_exists():
assert _parse_windows_default_gateway("Active Routes:\nNone\n", socket.AF_INET) is None
@patch("netsleuth.netinfo.platform.system", return_value="Linux")
@patch("netsleuth.netinfo.subprocess.run")
def test_linux_default_gateway_ipv4_success(mock_run, mock_sys):
from netsleuth.netinfo import _default_gateway
mock_run.return_value.stdout = "default via 192.168.1.1 dev eth0 proto dhcp metric 100\n"
assert _default_gateway(socket.AF_INET) == "192.168.1.1"
@patch("netsleuth.netinfo.platform.system", return_value="Linux")
@patch("netsleuth.netinfo.subprocess.run")
def test_linux_default_gateway_ipv6_success(mock_run, mock_sys):
from netsleuth.netinfo import _default_gateway
mock_run.return_value.stdout = "default via fe80::1 dev eth0 proto ra metric 1024 expires 1785sec\n"
assert _default_gateway(socket.AF_INET6) == "fe80::1"
@patch("netsleuth.netinfo.platform.system", return_value="Linux")
@patch("netsleuth.netinfo.subprocess.run")
def test_linux_default_gateway_returns_none_when_no_route(mock_run, mock_sys):
from netsleuth.netinfo import _default_gateway
mock_run.return_value.stdout = ""
assert _default_gateway(socket.AF_INET) is None
@patch("netsleuth.netinfo.platform.system", return_value="Linux")
@patch("netsleuth.netinfo.subprocess.run")
def test_linux_default_gateway_returns_none_on_oserror(mock_run, mock_sys):
from netsleuth.netinfo import _default_gateway
mock_run.side_effect = OSError("No ip command found")
assert _default_gateway(socket.AF_INET) is None
from dataclasses import dataclass
@dataclass