04ce7599e3
#3330 Fix pinned chat scroll after message rebuild Co-authored-by: jianongHe <jianongHe@users.noreply.github.com> #3311 fix: reject inline math when $ is followed by a digit (currency) Co-authored-by: toanalien <toanalien@users.noreply.github.com>
40 lines
1.3 KiB
Python
40 lines
1.3 KiB
Python
"""Regression coverage for #3319: pinned chat should recover after DOM rebuilds."""
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from pathlib import Path
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ROOT = Path(__file__).resolve().parents[1]
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UI_JS = (ROOT / "static" / "ui.js").read_text(encoding="utf-8")
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def _extract_fn(src: str, name: str) -> str:
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marker = f"function {name}"
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start = src.find(marker)
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assert start >= 0, f"{name} not found"
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brace = src.find("{", start)
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assert brace >= 0, f"{name} body not found"
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depth = 0
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for i in range(brace, len(src)):
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ch = src[i]
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if ch == "{":
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depth += 1
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elif ch == "}":
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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"{name} body did not close")
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def test_scroll_to_bottom_retries_after_next_layout_frame():
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fn = _extract_fn(UI_JS, "_setMessageScrollToBottom")
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assert "el.scrollTop=el.scrollHeight;" in fn
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assert "requestAnimationFrame(()=>{" in fn
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assert fn.count("el.scrollTop=el.scrollHeight;") >= 2
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assert fn.count("_lastScrollTop=el.scrollTop;") >= 2
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def test_scroll_if_pinned_recovers_when_far_from_bottom():
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fn = _extract_fn(UI_JS, "scrollIfPinned")
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assert "_messageBottomDistance()>500" in fn
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assert "_setMessageScrollToBottom();" in fn
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assert fn.index("_messageBottomDistance()>500") < fn.index("_settleMessageScrollToBottom(false)")
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