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ai-ag2026
77 lines
3.3 KiB
Python
77 lines
3.3 KiB
Python
from pathlib import Path
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REPO = Path(__file__).resolve().parents[1]
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UI_JS = (REPO / "static" / "ui.js").read_text(encoding="utf-8")
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MESSAGES_JS = (REPO / "static" / "messages.js").read_text(encoding="utf-8")
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SESSIONS_JS = (REPO / "static" / "sessions.js").read_text(encoding="utf-8")
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def _function_body(src: str, name: str) -> str:
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start = src.index(f"function {name}")
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brace = src.index("{", start)
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depth = 0
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for i in range(brace, len(src)):
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if src[i] == "{":
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depth += 1
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elif src[i] == "}":
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depth -= 1
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if depth == 0:
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return src[start : i + 1]
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raise AssertionError(f"function {name} body not found")
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def _event_listener_body(src: str, event_name: str) -> str:
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needle = f"source.addEventListener('{event_name}'"
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start = src.index(needle)
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brace = src.index("{", start)
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depth = 0
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for i in range(brace, len(src)):
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if src[i] == "{":
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depth += 1
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elif src[i] == "}":
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depth -= 1
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if depth == 0:
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return src[start : i + 1]
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raise AssertionError(f"event listener {event_name!r} body not found")
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def test_terminal_done_render_preserves_manual_scroll_after_active_stream_is_cleared():
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done_block = _event_listener_body(MESSAGES_JS, "done")
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clear_idx = done_block.index("S.activeStreamId=null")
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render_idx = done_block.index("renderMessages({preserveScroll:true})")
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assert clear_idx < render_idx, (
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"the done handler should clear stream liveness before the final render, "
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"but must pass preserveScroll so renderMessages does not infer bottom-pin "
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"from S.activeStreamId alone"
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)
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def test_render_messages_preserve_scroll_option_uses_user_pin_state_not_stream_liveness():
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render_body = _function_body(UI_JS, "renderMessages")
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scroll_helper = _function_body(UI_JS, "_scrollAfterMessageRender")
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assert "function renderMessages(options)" in render_body
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assert "const preserveScroll=!!(options&&options.preserveScroll);" in render_body
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assert "_scrollAfterMessageRender(preserveScroll, scrollSnapshot);" in render_body
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assert "const scrollSnapshot=preserveScroll?_captureMessageScrollSnapshot():null" in render_body
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assert "if(preserveScroll){\n if(_scrollPinned) scrollIfPinned();\n else _restoreMessageScrollSnapshot(scrollSnapshot);\n return;\n }" in scroll_helper
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assert "if(S.activeStreamId){\n scrollIfPinned();\n return;\n }" in scroll_helper
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def test_cached_render_path_uses_same_scroll_policy_as_fresh_render():
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render_body = _function_body(UI_JS, "renderMessages")
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cached_branch = render_body[render_body.index("if(sid&&sid!==_sessionHtmlCacheSid") : render_body.index("const compressionState=")]
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assert "_scrollAfterMessageRender(preserveScroll, scrollSnapshot);" in cached_branch
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assert "if(S.activeStreamId){scrollIfPinned();}else{scrollToBottom();}" not in cached_branch
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def test_session_switch_and_idle_session_load_keep_default_bottom_pin_behavior():
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load_session = _function_body(SESSIONS_JS, "loadSession")
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idle_branch = load_session[load_session.index("}else{\n S.busy=false;") : load_session.index("// Sync context usage indicator")]
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assert "syncTopbar();renderMessages();" in idle_branch
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assert "preserveScroll:true" not in idle_branch
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