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leaderboard: show each model's rank number and rank shift on the reorder plot #29

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Merged
bamdadd merged 1 commit into from
Jul 22, 2026
Merged

leaderboard: show each model's rank number and rank shift on the reorder plot #29

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22 changes: 20 additions & 2 deletions src/leakgauge/leaderboard.py
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Original file line number Diff line number Diff line change
Expand Up @@ -100,8 +100,26 @@ def y(rank: int) -> int:
f'<line x1="{left_x}" y1="{y1}" x2="{right_x}" y2="{y2}" '
f'stroke="{stroke}" stroke-width="{w}" opacity="{0.95 if moved else 0.55}"/>'
)
parts.append(f'<circle cx="{left_x}" cy="{y1}" r="6" fill="{stroke}"/>')
parts.append(f'<circle cx="{right_x}" cy="{y2}" r="6" fill="{stroke}"/>')
parts.append(f'<circle cx="{left_x}" cy="{y1}" r="9" fill="{stroke}"/>')
parts.append(f'<circle cx="{right_x}" cy="{y2}" r="9" fill="{stroke}"/>')
# Explicit rank position at each endpoint, so the reader doesn't have to
# infer it from vertical order.
parts.append(
f'<text x="{left_x}" y="{y1 + 4}" text-anchor="middle" font-size="11" '
f'font-weight="700" fill="#ffffff">{h_rank}</text>'
)
parts.append(
f'<text x="{right_x}" y="{y2 + 4}" text-anchor="middle" font-size="11" '
f'font-weight="700" fill="#ffffff">{l_rank}</text>'
)
# A mover gets its rank delta with an up/down glyph; a null (tau = 1)
# shows none. Rank 1 is best, so a smaller leakage rank is a move up.
if moved:
arrow = "&#9650;" if l_rank < h_rank else "&#9660;"
parts.append(
f'<text x="{right_x}" y="{y2 - 14}" text-anchor="middle" font-size="12" '
f'fill="{stroke}">{arrow}{abs(l_rank - h_rank)}</text>'
)
name = html.escape(m)
parts.append(
f'<text x="{left_x - 18}" y="{y1 + 5}" text-anchor="end" class="svg-lab">'
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26 changes: 26 additions & 0 deletions tests/test_leaderboard.py
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Original file line number Diff line number Diff line change
Expand Up @@ -87,3 +87,29 @@ def test_write_site_emits_index_html(tmp_path: Path) -> None:
path = write_site(summaries, rank_reorder(summaries), tmp_path)
assert path == tmp_path / "index.html"
assert path.read_text(encoding="utf-8").startswith("<!doctype html>")


def test_rank_numerals_and_delta_render_for_a_reorder() -> None:
# a hijacks more (hijack rank 1) but b leaks more (leakage rank 1): both move.
summaries = [_summary("prov:a", 0.9, 0.3), _summary("prov:b", 0.6, 0.7)]
reorder = rank_reorder(summaries)
assert reorder is not None

out = render_html(summaries, reorder)
# Explicit rank integers at the endpoints (white numerals on the nodes).
assert 'fill="#ffffff">1</text>' in out
assert 'fill="#ffffff">2</text>' in out
# Both models change rank, so an up and a down glyph with the delta appear.
assert "&#9650;1" in out # ▲1 (moved up)
assert "&#9660;1" in out # ▼1 (moved down)


def test_no_rank_delta_glyph_when_ranks_agree() -> None:
# a hijacks AND leaks more -> ranks agree (tau = 1), nobody moves.
summaries = [_summary("prov:a", 0.9, 0.8), _summary("prov:b", 0.4, 0.3)]
reorder = rank_reorder(summaries)
assert reorder is not None

out = render_html(summaries, reorder)
assert 'fill="#ffffff">1</text>' in out # ranks still numbered
assert "&#9650;" not in out and "&#9660;" not in out # but no movement glyph
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