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110 lines
3.6 KiB
Python
110 lines
3.6 KiB
Python
"""Regression tests for arrow-key decoding in the curses menus.
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Root cause these guard against: on many terminals/terminfo entries, cursor
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keys are delivered to ``getch()`` as raw CSI/SS3 escape byte sequences
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(``27, 91, 66`` for arrow-down) even when ``keypad(True)`` is set. The menus
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used to treat the leading ``27`` as ESC/cancel, which dumped the setup wizard's
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provider/model picker into its numbered "Select [1-N]" fallback the instant a
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user pressed up or down.
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"""
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import sys
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import pytest
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# curses (and its _curses C extension) is Unix-only; skip the whole module on Windows.
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if sys.platform == "win32":
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pytest.skip("curses is not available on Windows", allow_module_level=True)
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import curses
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from hermes_cli.curses_ui import (
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NAV_CANCEL,
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NAV_DOWN,
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NAV_NONE,
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NAV_SELECT,
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NAV_UP,
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read_menu_key,
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)
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class FakeStdscr:
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"""Minimal stdscr stand-in that replays a queue of getch() byte returns.
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``getch`` pops from ``keys``; an empty queue yields ``-1`` (matching curses
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non-blocking behavior). ``timeout`` is recorded but otherwise inert.
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"""
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def __init__(self, keys):
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self.keys = list(keys)
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self.timeouts = []
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def getch(self):
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return self.keys.pop(0) if self.keys else -1
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def timeout(self, ms):
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self.timeouts.append(ms)
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def test_raw_csi_arrow_down_decodes_to_down():
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# ESC [ B -> down, NOT cancel
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assert read_menu_key(FakeStdscr([27, ord("["), ord("B")])) == NAV_DOWN
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def test_raw_csi_arrow_up_decodes_to_up():
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# ESC [ A -> up
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assert read_menu_key(FakeStdscr([27, ord("["), ord("A")])) == NAV_UP
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def test_raw_ss3_arrow_keys_decode():
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# Application cursor mode: ESC O B / ESC O A
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assert read_menu_key(FakeStdscr([27, ord("O"), ord("B")])) == NAV_DOWN
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assert read_menu_key(FakeStdscr([27, ord("O"), ord("A")])) == NAV_UP
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def test_translated_key_constants_still_work():
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assert read_menu_key(FakeStdscr([curses.KEY_DOWN])) == NAV_DOWN
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assert read_menu_key(FakeStdscr([curses.KEY_UP])) == NAV_UP
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def test_vim_keys():
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assert read_menu_key(FakeStdscr([ord("j")])) == NAV_DOWN
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assert read_menu_key(FakeStdscr([ord("k")])) == NAV_UP
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def test_lone_escape_is_cancel():
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# ESC with no continuation byte (getch returns -1) -> genuine cancel.
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assert read_menu_key(FakeStdscr([27])) == NAV_CANCEL
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def test_q_is_cancel():
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assert read_menu_key(FakeStdscr([ord("q")])) == NAV_CANCEL
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def test_enter_variants_select():
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assert read_menu_key(FakeStdscr([10])) == NAV_SELECT
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assert read_menu_key(FakeStdscr([13])) == NAV_SELECT
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assert read_menu_key(FakeStdscr([curses.KEY_ENTER])) == NAV_SELECT
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def test_unhandled_csi_sequence_is_consumed_and_ignored():
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# Delete key (ESC [ 3 ~): must be swallowed whole and map to NAV_NONE so
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# its tail bytes don't leak into a subsequent input() call.
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fake = FakeStdscr([27, ord("["), ord("3"), ord("~"), ord("X")])
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assert read_menu_key(fake) == NAV_NONE
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# The trailing 'X' (a genuinely separate keypress) must remain unconsumed.
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assert fake.keys == [ord("X")]
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def test_home_end_csi_sequences_ignored():
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# ESC [ H (Home) and ESC [ F (End) -> NAV_NONE, fully consumed.
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assert read_menu_key(FakeStdscr([27, ord("["), ord("H")])) == NAV_NONE
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assert read_menu_key(FakeStdscr([27, ord("["), ord("F")])) == NAV_NONE
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def test_escape_uses_short_timeout_then_restores_blocking():
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fake = FakeStdscr([27, ord("["), ord("B")])
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read_menu_key(fake)
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# A short positive timeout is set to wait for the continuation byte, then
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# blocking mode (-1) is restored.
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assert fake.timeouts[0] > 0
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assert fake.timeouts[-1] == -1
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