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

tests/cli/test_cli_cmd_backspace.py

@@ -0,0 +1,79 @@
+"""Verify Cmd+Backspace / Cmd+ForwardDelete byte sequences from CSI-u
+terminals reach prompt_toolkit's readline kill bindings instead of leaking
+into the buffer as literal text.
+"""
+
+from __future__ import annotations
+
+import pytest
+
+from prompt_toolkit.input.ansi_escape_sequences import ANSI_SEQUENCES
+from prompt_toolkit.input.vt100_parser import Vt100Parser
+from prompt_toolkit.keys import Keys
+
+from hermes_cli.pt_input_extras import install_cmd_backspace_alias
+
+
+# Cmd rides as the super modifier bit (8), so modifier = 9 (super) or
+# 10 (super+shift).
+CMD_BACKSPACE_SEQUENCES = (
+    "\x1b[127;9u",       # Kitty CSI-u
+    "\x1b[127;10u",      # Kitty CSI-u, +shift
+    "\x1b[27;9;127~",    # xterm modifyOtherKeys
+)
+
+# Forward-delete is a CSI tilde key, not a CSI-u codepoint.
+CMD_FWD_DELETE_SEQUENCES = (
+    "\x1b[3;9~",
+    "\x1b[3;10~",
+)
+
+
+@pytest.fixture(autouse=True)
+def _ensure_alias_installed():
+    install_cmd_backspace_alias()
+
+
+def _parse(byte_seq: str):
+    out = []
+    parser = Vt100Parser(out.append)
+    for ch in byte_seq:
+        parser.feed(ch)
+    parser.flush()
+    return [kp.key for kp in out]
+
+
+@pytest.mark.parametrize("seq", CMD_BACKSPACE_SEQUENCES)
+def test_cmd_backspace_parses_as_ctrl_u(seq):
+    """Cmd+Backspace must reach unix-line-discard, exactly as Ctrl+U does."""
+    assert _parse(seq) == _parse("\x15")
+
+
+@pytest.mark.parametrize("seq", CMD_FWD_DELETE_SEQUENCES)
+def test_cmd_forward_delete_parses_as_ctrl_k(seq):
+    """Cmd+ForwardDelete must reach kill-line, exactly as Ctrl+K does."""
+    assert _parse(seq) == _parse("\x0b")
+
+
+@pytest.mark.parametrize("seq", CMD_BACKSPACE_SEQUENCES + CMD_FWD_DELETE_SEQUENCES)
+def test_sequences_emit_exactly_one_keypress(seq):
+    """The whole sequence is consumed. A partial match would emit Escape
+    plus the remainder as literal text — the bug this alias exists to fix."""
+    assert len(_parse(seq)) == 1
+
+
+def test_install_is_idempotent():
+    install_cmd_backspace_alias()
+    assert install_cmd_backspace_alias() == 0
+
+
+def test_unmodified_keys_keep_their_own_bindings():
+    """Aliasing the Cmd variants must not disturb the bare keys."""
+    assert ANSI_SEQUENCES["\x1b[3~"] == Keys.Delete
+    assert ANSI_SEQUENCES["\x7f"] == Keys.ControlH
+
+
+def test_ctrl_forward_delete_is_not_remapped():
+    """Ctrl+ForwardDelete (modifier 5) is delete-word on Linux/Windows and
+    must keep prompt_toolkit's own binding, not become kill-line."""
+    assert ANSI_SEQUENCES["\x1b[3;5~"] == Keys.ControlDelete