Add channel-aware release tooling and updater recovery

release_tests/test_update_dialog.py

@@ -0,0 +1,71 @@
+from __future__ import annotations
+
+import unittest
+
+from ptlinux.ui.components.update_dialog import (
+	release_history_state,
+	release_notes_preview,
+	update_version_heading,
+)
+
+
+class UpdateDialogTests(unittest.TestCase):
+	def test_release_notes_preview_shows_changes_without_build_footer(self) -> None:
+		preview = release_notes_preview(
+			"# Launcher 1.8.0\n\n"
+			"## Highlights\n\n"
+			"- Added channel-aware updates\n"
+			"- Improved rollback\n\n"
+			"---\n\nVersion: `1.8.0`\n"
+		)
+
+		self.assertIn("## Highlights", preview)
+		self.assertIn("- Improved rollback", preview)
+		self.assertNotIn("Version:", preview)
+		self.assertNotIn("Launcher 1.8.0", preview)
+
+	def test_release_notes_preview_is_bounded(self) -> None:
+		preview = release_notes_preview(
+			"\n".join(f"- Change {index}" for index in range(30))
+		)
+
+		self.assertIn("- Change 0", preview)
+		self.assertNotIn("- Change 20", preview)
+		self.assertTrue(preview.endswith("…"))
+
+	def test_current_version_heading_uses_running_launcher(self) -> None:
+		self.assertEqual(
+			update_version_heading(
+				"0.9.11",
+				"0.9.10",
+				"stable",
+				update_available=False,
+			),
+			"Current version: 0.9.11\nLatest Stable release: 0.9.10",
+		)
+
+	def test_history_distinguishes_running_and_installed_versions(self) -> None:
+		self.assertEqual(
+			release_history_state(
+				"active",
+				is_running=True,
+				local_active=False,
+				local_retained=False,
+				is_older=False,
+			),
+			"Current",
+		)
+		self.assertEqual(
+			release_history_state(
+				"active",
+				is_running=False,
+				local_active=True,
+				local_retained=True,
+				is_older=False,
+			),
+			"Installed",
+		)
+
+
+if __name__ == "__main__":
+	unittest.main()