Module adversarial 

Adversarial input generators.

These generators produce inputs that exercise failure paths: oversized files, malformed UTF-8, unusual filenames. Every generator is deterministic given a seed (where applicable).

Use cases

• Oversized: confirm that buffer-allocation paths handle files larger than common assumptions.
• Malformed UTF-8: confirm that decoders return errors instead of panicking on invalid bytes.
• Unusual names: confirm that path-handling code copes with Unicode, emoji, very long names, etc.

Functions

malformed_utf8

Write a deliberately malformed UTF-8 byte sequence to path.

oversized_sparse

Write size_bytes to path using set_len, which on most platforms creates a sparse file (no actual disk space used until written to).

oversized_zeros

Write size_bytes of zeroes to path. The parent directory MUST exist.

random_bytes

Write n deterministic bytes to path using a splitmix64-derived stream seeded by seed.

unusual_names

Names that are valid on most filesystems but exercise edge cases: long names, Unicode, emoji, leading dot.