Stop the native portal with the graphical session

scripts/tests/test_portal_install.py

@@ -0,0 +1,55 @@
+"""Exercise portal upgrade preflight against temporary installation files."""
+from pathlib import Path
+import subprocess
+import tempfile
+import unittest
+
+REPO = Path(__file__).resolve().parents[2]
+LEGACY = ('[D-BUS Service]\n'
+          'Name=org.freedesktop.impl.portal.desktop.ferese\n'
+          'Exec=/usr/local/lib/ferese/current/xdg-desktop-portal-ferese\n')
+
+
+class PortalInstallTest(unittest.TestCase):
+    def preflight(self, service=None, unit=None):
+        script = (REPO / 'scripts/install-session.sh').read_text()
+        start = script.index('service=/usr/local/share/dbus-1/services/')
+        script = script[start:script.index('session_target=', start)]
+        with tempfile.TemporaryDirectory() as directory:
+            root = Path(directory)
+            if service is not None:
+                (root / 'activation.service').write_text(service)
+            if unit is not None:
+                (root / 'portal.service').write_text(unit)
+            script = script.replace(
+                'service=/usr/local/share/dbus-1/services/org.freedesktop.impl.portal.desktop.ferese.service',
+                'service="$TEST_ROOT/activation.service"')
+            script = script.replace('$(basename "$service")',
+                                    'org.freedesktop.impl.portal.desktop.ferese.service')
+            script = script.replace(
+                'portal_unit=/usr/local/lib/systemd/user/xdg-desktop-portal-ferese.service',
+                'portal_unit="$TEST_ROOT/portal.service"')
+            return subprocess.run(['bash', '-eu', '-c', script],
+                                  env={'repo_dir': str(REPO), 'TEST_ROOT': directory},
+                                  capture_output=True, text=True)
+
+    def test_accepts_fresh_install_and_previous_activation_file(self):
+        self.assertEqual(self.preflight().returncode, 0)
+        self.assertEqual(self.preflight(LEGACY).returncode, 0)
+
+    def test_accepts_current_managed_files(self):
+        service = (REPO / 'packaging/portal/org.freedesktop.impl.portal.desktop.ferese.service').read_text()
+        unit = (REPO / 'packaging/systemd/xdg-desktop-portal-ferese.service').read_text()
+        self.assertEqual(self.preflight(service, unit).returncode, 0)
+
+    def test_preserves_modified_activation_and_systemd_files(self):
+        result = self.preflight(LEGACY.replace('/usr/local/lib/ferese/current/', '/custom/'))
+        self.assertNotEqual(result.returncode, 0)
+        self.assertIn('Unmanaged portal service', result.stderr)
+        result = self.preflight(LEGACY, '[Service]\nExecStart=/custom/portal\n')
+        self.assertNotEqual(result.returncode, 0)
+        self.assertIn('Unmanaged portal unit', result.stderr)
+
+
+if __name__ == '__main__':
+    unittest.main()