Import AITURK IDE 1.0.0-beta.1 from Hermes 63279301; preserve MIT license

tests/hermes_cli/test_terminal_io_broken_81521.py

@@ -0,0 +1,59 @@
+"""CLI freezes UI paints after stdout/PTY EIO (#81521).
+
+A stream-stall interrupt that corrupts the PTY used to leave the classic
+CLI invalidating hundreds of times per second (escape-sequence flood).
+Once EIO is observed, paints must stop.
+"""
+
+from __future__ import annotations
+
+import errno
+from unittest.mock import MagicMock
+
+import pytest
+
+
+def _make_cli_stub():
+    from cli import HermesCLI
+
+    cli = object.__new__(HermesCLI)
+    cli._terminal_io_broken = False
+    cli._resize_recovery_pending = False
+    cli._last_invalidate = 0.0
+    cli._pet_anim_running = False
+    cli._app = MagicMock()
+    return cli
+
+
+class TestTerminalIoBrokenFreeze:
+    def test_mark_terminal_io_broken_is_idempotent(self):
+        cli = _make_cli_stub()
+        cli._mark_terminal_io_broken("first")
+        cli._mark_terminal_io_broken("second")
+        assert cli._terminal_io_broken is True
+
+    def test_invalidate_stops_after_eio(self):
+        cli = _make_cli_stub()
+        cli._app.invalidate.side_effect = OSError(errno.EIO, "Input/output error")
+
+        cli._invalidate(min_interval=0.0)
+
+        assert cli._terminal_io_broken is True
+        assert cli._app.invalidate.call_count == 1
+
+        cli._invalidate(min_interval=0.0)
+        # Frozen — no further paints.
+        assert cli._app.invalidate.call_count == 1
+
+    def test_force_full_redraw_skipped_when_broken(self):
+        cli = _make_cli_stub()
+        cli._terminal_io_broken = True
+        cli._force_full_redraw()
+        cli._app.invalidate.assert_not_called()
+
+    def test_recover_terminal_after_interrupt_skips_when_broken(self):
+        cli = _make_cli_stub()
+        cli._terminal_io_broken = True
+        cli._force_full_redraw = MagicMock()
+        cli._recover_terminal_after_interrupt()
+        cli._force_full_redraw.assert_not_called()