4d6fd8a4ab
Add 7 adversarial PDF fixtures exercising Phase 1 error-recovery paths: - xref_30pct_bad_offsets.pdf: 100 objects, 30 bad xref offsets - missing_mediabox_all_pages.pdf: 10 pages, no /MediaBox at any level - missing_endobj.pdf: object 5 missing endobj marker - truncated_mid_stream.pdf: FlateDecode stream truncated mid-decompression - int_overflow_bbox.pdf: /BBox value 99999999999999999 (i32 overflow) - nested_failure.pdf: every page has at least one diagnostic - combined_failures.pdf: combines multiple failure modes (keystone INV-8 test) Each fixture has a sibling .expected_diagnostics.json file with threshold counts (>= not == per EC-07/EC-09 to tolerate drift). Integration test harness (error_recovery_integration.rs): - assert_diagnostic_count_at_least() helper for threshold checking - assert_no_panic() helper using std::panic::catch_unwind for INV-8 - Individual test functions for each fixture - Cumulative test_inv_8_no_panics_across_all_fixtures() All 8 tests pass. INV-8 verified: zero panics across all fixtures. Closes: pdftract-4w0v4
89 lines
1.9 KiB
Python
89 lines
1.9 KiB
Python
#!/usr/bin/env python3
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"""Generate truncated_mid_stream.pdf - stream body cut off mid-FlateDecode."""
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import zlib
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# Create some content that will be compressed
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content = b"This is a test stream that should be longer than what we include. " * 100
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# Compress the content
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compressed = zlib.compress(content)
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# Truncate the compressed data mid-stream (cut off at 50%)
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truncated = compressed[:len(compressed)//2]
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PDF_CONTENT = f"""%PDF-1.4
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1 0 obj
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<< /Type /Catalog /Pages 2 0 R >>
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endobj
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2 0 obj
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<< /Type /Pages /Kids [3 0 R] /Count 1 >>
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endobj
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3 0 obj
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<< /Type /Page /Parent 2 0 R /MediaBox [0 0 612 792] /Contents 4 0 R /Resources << /Font << /F1 5 0 R >> >> >>
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endobj
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4 0 obj
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<< /Length {len(truncated)} /Filter /FlateDecode >>
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stream
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{truncated.decode('latin-1', errors='ignore')}
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endstream
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endobj
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5 0 obj
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<< /Type /Font /Subtype /Type1 /BaseFont /Helvetica >>
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endobj
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xref
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0 6
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0000000000 65535 f
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0000000009 00000 n
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0000000058 00000 n
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0000000131 00000 n
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0000000274 00000 n
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trailer
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<< /Size 6 /Root 1 0 R >>
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startxref
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{len(truncated) + 400}
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%%EOF
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"""
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# Actually, let me create a simpler truncated stream
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PDF_SIMPLE = b"""%PDF-1.4
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1 0 obj
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<< /Type /Catalog /Pages 2 0 R >>
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endobj
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2 0 obj
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<< /Type /Pages /Kids [3 0 R] /Count 1 >>
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endobj
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3 0 obj
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<< /Type /Page /Parent 2 0 R /MediaBox [0 0 612 792] /Contents 4 0 R /Resources << >> >>
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endobj
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4 0 obj
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<< /Length 100 /Filter /FlateDecode >>
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stream
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"""
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# Add truncated compressed data
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PDF_SIMPLE += truncated[:50]
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PDF_SIMPLE += b"""
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endstream
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endobj
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xref
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0 5
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0000000000 65535 f
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0000000009 00000 n
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0000000058 00000 n
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0000000131 00000 n
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0000000274 00000 n
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trailer
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<< /Size 5 /Root 1 0 R >>
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startxref
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450
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%%EOF
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"""
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with open('truncated_mid_stream.pdf', 'wb') as f:
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f.write(PDF_SIMPLE)
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print("Generated truncated_mid_stream.pdf")
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print("FlateDecode stream is truncated mid-decompression")
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print("Expected: partial output returned, STREAM_DECODE_ERROR diagnostic emitted")
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