FAILURE MAP
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An optional BOM is appended instead of prepended · case 04

An optional BOM is appended instead of prepended.

Member previewVariant 4 · 3 implementations · 4 checks per implementation

Case contract

Encode text as UTF-8 with exactly one generated leading BOM; preserve any BOM in the input text.

Why this case matters

A local executable model for consumers of structured text; oracle values are authored literals, not outputs copied from the repaired implementation.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixtureActualExpectedOutcome
boundary 1[97][239, 187, 191, 97]Failed

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