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Ahmed AllamandAhmed Allam
0ebd3c6230
The head+tail slices could each take half of max_bytes, then the truncation notice and its separators were appended on top, so the value persisted to history could exceed the configured maximum. Reserve an upper bound for the notice (and separators) out of the byte budget before slicing so the whole joined result stays within max_bytes.
66 lines
2.3 KiB
Python
66 lines
2.3 KiB
Python
"""Tests for per-tool-output bounding."""
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from __future__ import annotations
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import re
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from strix.tools.output_store import bound_text
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def test_small_output_passes_through_unchanged() -> None:
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text = "line 1\nline 2\nline 3"
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assert bound_text(text, max_lines=100, max_bytes=10_000) == text
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def test_line_limit_keeps_head_and_tail() -> None:
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text = "\n".join(str(i) for i in range(1000))
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bounded = bound_text(text, max_lines=10, max_bytes=1_000_000)
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assert bounded.startswith("0\n1\n2\n3\n4")
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assert bounded.rstrip().endswith("999")
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assert "truncated" in bounded
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# Head + tail only, far fewer than the original 1000 lines.
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assert len(bounded.splitlines()) < 30
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def test_byte_limit_enforced_on_single_long_line() -> None:
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text = "x" * 100_000
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bounded = bound_text(text, max_lines=2_000, max_bytes=1_000)
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assert "truncated" in bounded
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# The whole joined result (head + tail + notice + separators) honours the
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# configured maximum, not just the head/tail slices.
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assert len(bounded.encode("utf-8")) <= 1_000
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def test_multibyte_characters_not_split() -> None:
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text = "😀" * 50_000
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bounded = bound_text(text, max_lines=2_000, max_bytes=1_000)
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# Must remain valid UTF-8 (no broken surrogate halves from a mid-char cut).
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assert bounded == bounded.encode("utf-8").decode("utf-8")
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assert "truncated" in bounded
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def test_notice_reports_dropped_counts() -> None:
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text = "\n".join("y" * 10 for _ in range(500))
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bounded = bound_text(text, max_lines=10, max_bytes=1_000_000)
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assert "lines" in bounded
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assert "bytes" in bounded
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def test_dropped_line_count_accounts_for_byte_trimming() -> None:
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# A tight byte budget forces the byte pass to drop whole lines from the
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# head/tail slices; the notice must count those, not just the middle.
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text = "\n".join(f"line-{i}" for i in range(200))
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bounded = bound_text(text, max_lines=20, max_bytes=40)
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match = re.search(r"\[\.\.\. (\d+) lines", bounded)
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assert match is not None, bounded
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dropped = int(match.group(1))
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kept = [ln for ln in bounded.splitlines() if ln and "truncated" not in ln]
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assert dropped == 200 - len(kept)
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# The naive middle-only count (max_lines split evenly) would under-report.
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assert dropped > 200 - 20
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