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https://github.com/Horizontal42/netsleuth.git
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007fdb2509
Added tests for the `detect_capabilities` function in `src/netsleuth/netinfo.py` to cover both Linux and Windows OS flows, improving test coverage and reliability. Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>
201 lines
7.3 KiB
Python
201 lines
7.3 KiB
Python
from __future__ import annotations
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from netsleuth.models import Capabilities
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from netsleuth.netinfo import (
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choose_latency_backend,
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choose_trace_backend,
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degradation_note,
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)
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def caps(**kw) -> Capabilities:
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base = dict(os_name="Linux", is_elevated=False, icmp_dgram=False, icmp_raw=False, icmp_win_api=False)
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base.update(kw)
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return Capabilities(**base)
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def test_windows_prefers_the_win32_icmp_api_over_everything():
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c = caps(os_name="Windows", icmp_win_api=True, icmp_dgram=True, icmp_raw=True)
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assert choose_latency_backend(c) == "icmp_win"
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def test_unix_prefers_unprivileged_datagram_icmp():
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assert choose_latency_backend(caps(icmp_dgram=True, icmp_raw=True)) == "icmp_dgram"
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def test_unix_falls_back_to_raw_icmp_when_datagram_is_unavailable():
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assert choose_latency_backend(caps(icmp_raw=True, is_elevated=True)) == "icmp_raw"
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from netsleuth.netinfo import detect_capabilities
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from unittest.mock import patch
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def test_detect_capabilities_linux_happy_path():
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with patch("netsleuth.netinfo.platform.system", return_value="Linux"), \
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patch("netsleuth.netinfo._is_elevated", return_value=True), \
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patch("netsleuth.netinfo._socket_works", side_effect=[True, True]), \
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patch("netsleuth.netinfo._win_icmp_available", return_value=False), \
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patch("netsleuth.netinfo.shutil.which", side_effect=lambda x: "/usr/bin/" + x):
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c = detect_capabilities()
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assert c.os_name == "Linux"
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assert c.is_elevated is True
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assert c.icmp_dgram is True
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assert c.icmp_raw is True
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assert c.icmp_win_api is False
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assert c.mtr_binary == "/usr/bin/mtr"
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assert c.traceroute_binary == "/usr/bin/traceroute"
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def test_detect_capabilities_windows_happy_path():
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with patch("netsleuth.netinfo.platform.system", return_value="Windows"), \
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patch("netsleuth.netinfo._is_elevated", return_value=False), \
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patch("netsleuth.netinfo._socket_works", return_value=False), \
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patch("netsleuth.netinfo._win_icmp_available", return_value=True), \
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patch("netsleuth.netinfo.shutil.which", side_effect=lambda x: "C:\\Windows\\System32\\" + x + ".exe"):
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c = detect_capabilities()
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assert c.os_name == "Windows"
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assert c.is_elevated is False
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assert c.icmp_dgram is False
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assert c.icmp_raw is False
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assert c.icmp_win_api is True
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assert c.mtr_binary == "C:\\Windows\\System32\\mtr.exe"
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assert c.traceroute_binary == "C:\\Windows\\System32\\tracert.exe"
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def test_latency_falls_back_to_tcp_when_no_icmp_is_possible():
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assert choose_latency_backend(caps()) == "tcp"
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def test_trace_backend_prefers_mtr_when_the_binary_exists():
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c = caps(mtr_binary="/usr/bin/mtr", icmp_dgram=True, traceroute_binary="/usr/bin/traceroute")
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assert choose_trace_backend(c) == "mtr_json"
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def test_trace_backend_uses_win_api_before_the_system_binary():
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c = caps(os_name="Windows", icmp_win_api=True, traceroute_binary="C:\\Windows\\System32\\TRACERT.EXE")
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assert choose_trace_backend(c) == "icmp_win"
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def test_trace_backend_uses_icmplib_on_unix_before_the_system_binary():
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c = caps(icmp_dgram=True, traceroute_binary="/usr/bin/traceroute")
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assert choose_trace_backend(c) == "icmplib"
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def test_trace_backend_falls_back_to_the_system_binary():
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assert choose_trace_backend(caps(traceroute_binary="/usr/bin/traceroute")) == "system_traceroute"
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def test_trace_backend_reports_none_when_nothing_is_available():
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assert choose_trace_backend(caps()) == "none"
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def test_degradation_note_is_absent_when_icmp_works():
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assert degradation_note(caps(icmp_dgram=True, traceroute_binary="/usr/bin/traceroute")) is None
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def test_degradation_note_explains_the_tcp_fallback_with_a_remedy():
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note = degradation_note(caps())
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assert note is not None
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assert "TCP" in note
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assert "ping_group_range" in note
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def test_degradation_note_on_windows_mentions_the_api_rather_than_sysctl():
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note = degradation_note(caps(os_name="Windows"))
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assert note is not None
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assert "Iphlpapi" in note
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import pytest
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from netsleuth.netinfo import iface_for_ip, is_tunnel_iface, mtu_anomaly
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def test_iface_for_ip_matches_the_owning_adapter():
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addrs = {
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"lo": [(2, "127.0.0.1")],
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"eth0": [(2, "192.168.1.34"), (23, "fe80::1")],
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"wg0": [(2, "10.7.0.2")],
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}
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assert iface_for_ip("192.168.1.34", addrs) == "eth0"
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assert iface_for_ip("10.7.0.2", addrs) == "wg0"
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assert iface_for_ip("203.0.113.1", addrs) is None
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@pytest.mark.parametrize(
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"name",
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["tun0", "tap0", "wg0", "utun3", "ppp0", "WireGuard Tunnel", "TAP-Windows Adapter V9", "nordlynx"],
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)
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def test_tunnel_interfaces_are_recognised(name):
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assert is_tunnel_iface(name) is True
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@pytest.mark.parametrize("name", ["eth0", "en0", "Wi-Fi", "Ethernet 2", "lo", "Loopback Pseudo-Interface 1"])
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def test_ordinary_interfaces_are_not_flagged_as_tunnels(name):
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assert is_tunnel_iface(name) is False
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def test_mtu_anomaly_recognises_wireguard_and_ipsec_sizes():
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assert mtu_anomaly(1420) == "wireguard"
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assert mtu_anomaly(1412) == "wireguard"
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assert mtu_anomaly(1400) == "ipsec"
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assert mtu_anomaly(1380) == "ipsec"
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def test_mtu_anomaly_ignores_normal_and_unknown_values():
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assert mtu_anomaly(1500) is None
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assert mtu_anomaly(9000) is None
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assert mtu_anomaly(None) is None
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def test_mtu_anomaly_flags_unusually_small_links_generically():
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assert mtu_anomaly(1200) == "small"
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import socket
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from netsleuth.netinfo import _parse_windows_default_gateway
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_ROUTE_PRINT_WITH_A_VPN_ADAPTER = """
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===========================================================================
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Interface List
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12...00 15 5d 01 ab cd ......Ethernet
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15...00 ff 21 4a bc de ......Radmin VPN
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===========================================================================
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IPv4 Route Table
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===========================================================================
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Active Routes:
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Network Destination Netmask Gateway Interface Metric
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0.0.0.0 0.0.0.0 26.0.0.1 26.0.0.5 35
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0.0.0.0 0.0.0.0 192.168.3.1 192.168.3.72 25
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26.0.0.0 255.0.0.0 On-link 26.0.0.5 291
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192.168.3.0 255.255.255.0 On-link 192.168.3.72 281
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===========================================================================
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Persistent Routes:
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None
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"""
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def test_windows_default_gateway_picks_the_lowest_metric_route_not_the_first_listed():
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# Radmin VPN's 0.0.0.0 route (metric 35) is listed before the real Ethernet
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# default (metric 25); Windows itself prefers the lower metric for outbound
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# traffic, so the parser must too, regardless of listing order.
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assert (
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_parse_windows_default_gateway(_ROUTE_PRINT_WITH_A_VPN_ADAPTER, socket.AF_INET) == "192.168.3.1"
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)
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def test_windows_default_gateway_returns_the_only_route_when_there_is_one():
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single = """
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Network Destination Netmask Gateway Interface Metric
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0.0.0.0 0.0.0.0 192.168.1.1 192.168.1.34 25
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"""
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assert _parse_windows_default_gateway(single, socket.AF_INET) == "192.168.1.1"
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def test_windows_default_gateway_returns_none_when_no_default_route_exists():
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assert _parse_windows_default_gateway("Active Routes:\nNone\n", socket.AF_INET) is None
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