73 lines
3.0 KiB
Python
73 lines
3.0 KiB
Python
"""Test the platform-branched PTY bridge import in hermes_cli.web_server_chat.
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The /api/pty WebSocket handler picks its bridge at import
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time via ``sys.platform.startswith("win")`` — Windows gets the ConPTY
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backend, POSIX gets the fcntl/termios one. Both branches must:
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1. Expose ``PtyBridge`` as the bridge class (or None) and
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``PtyUnavailableError`` as an exception class.
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2. Set ``_PTY_BRIDGE_AVAILABLE`` correctly.
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3. Never raise at import time when the platform-native dependency is
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missing — the dashboard's non-chat tabs must keep loading.
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This test asserts the live state on whichever platform CI runs on, plus a
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source-text check confirming the branch shape is preserved so a future
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refactor can't accidentally collapse it back to a POSIX-only import.
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"""
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from __future__ import annotations
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import sys
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import pytest
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import hermes_cli.web_server_chat as _web_server_chat
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def test_web_server_exposes_pty_bridge_symbols():
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"""The two symbols /api/pty consumes must always exist."""
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assert hasattr(_web_server_chat, "PtyBridge")
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assert hasattr(_web_server_chat, "PtyUnavailableError")
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assert hasattr(_web_server_chat, "_PTY_BRIDGE_AVAILABLE")
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# PtyUnavailableError is always an exception class — either the real
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# one from the platform bridge, or the local fallback class.
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assert isinstance(_web_server_chat.PtyUnavailableError, type)
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assert issubclass(_web_server_chat.PtyUnavailableError, BaseException)
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@pytest.mark.skipif(sys.platform.startswith("win"), reason="POSIX-only")
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def test_web_server_uses_posix_pty_bridge_on_posix():
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"""On POSIX, the bridge must be the fcntl/termios PtyBridge."""
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from hermes_cli.pty_bridge import PtyBridge as PosixBridge
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from hermes_cli.pty_bridge import PtyUnavailableError as PosixErr
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assert _web_server_chat.PtyBridge is PosixBridge
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assert _web_server_chat._PTY_BRIDGE_AVAILABLE is True
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assert _web_server_chat.PtyUnavailableError is PosixErr
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def test_pty_bridge_import_block_is_platform_branched():
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"""Source-level guard: a future refactor must not collapse the branch
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back to a single POSIX import. Reads the module that owns the import
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block (``web_server_chat``) directly so this fails the same way on every
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OS — the runtime symbol checks above can pass even when the branch shape
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is wrong on the current platform."""
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from hermes_cli import web_server_chat
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src = pytest.importorskip("inspect").getsource(web_server_chat)
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# The shape we expect (from PR #39913):
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#
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# if sys.platform.startswith("win"):
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# try:
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# from hermes_cli.win_pty_bridge import WinPtyBridge as PtyBridge, ...
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# except ImportError:
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# PtyBridge = None
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# ...
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# else:
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# try:
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# from hermes_cli.pty_bridge import PtyBridge, PtyUnavailableError
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# ...
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assert 'sys.platform.startswith("win")' in src or "sys.platform.startswith('win')" in src
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assert "from hermes_cli.win_pty_bridge import" in src
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assert "from hermes_cli.pty_bridge import" in src
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