feat: add declarative sing-box egress control plane

tests/test_version.py

@@ -0,0 +1,43 @@
+from __future__ import annotations
+
+import subprocess
+import unittest
+
+from vpn_egressctl.errors import CommandError, UnsupportedVersionError
+from vpn_egressctl.version import parse_version_output, probe_version, require_supported
+
+from tests.helpers import FakeRunner, VERSION_OUTPUT
+
+
+class VersionTests(unittest.TestCase):
+    def test_parse_and_require(self) -> None:
+        version = parse_version_output(VERSION_OUTPUT)
+        self.assertEqual(version.version, "1.13.19")
+        self.assertIn("with_quic", version.tags)
+        require_supported(version)
+
+    def test_other_versions_are_rejected(self) -> None:
+        for value in ("1.13.12", "1.13.20", "1.14.0", "1.13.19-rc.1"):
+            text = VERSION_OUTPUT.replace("1.13.19", value, 1)
+            with self.subTest(value=value), self.assertRaises(UnsupportedVersionError):
+                require_supported(parse_version_output(text))
+
+    def test_non_linux_rejected(self) -> None:
+        version = parse_version_output(VERSION_OUTPUT.replace("linux/amd64", "windows/amd64"))
+        with self.assertRaises(UnsupportedVersionError):
+            require_supported(version)
+
+    def test_missing_quic_rejected(self) -> None:
+        version = parse_version_output(VERSION_OUTPUT.replace("with_quic,", ""))
+        with self.assertRaises(UnsupportedVersionError):
+            require_supported(version)
+
+    def test_command_failure(self) -> None:
+        runner = FakeRunner()
+        runner.version = "garbage"
+        with self.assertRaises(UnsupportedVersionError):
+            probe_version("sing-box", runner)
+
+
+if __name__ == "__main__":
+    unittest.main()