Module diff 

Unified-diff rendering for assertion failures.

Produces a plain-text diff (no ANSI) so it survives the Rust → QuickJS → JS error round trip. Printers add color at output time. The format matches the GNU diff -u shape — - for expected lines (what we asked for), + for received (what the test got), for context.

Functions

json_diff

Render expected vs received as pretty JSON + a unified diff. Suitable for toEqual / toMatchObject / toContainEqual where the full structural shape matters.

pretty_json

Render a serde_json::Value as multi-line pretty JSON with asymmetric matchers rendered as <Description> placeholders so the diff highlights the matcher rather than its tagged wire shape.

unified_diff

Unified diff between two pretty-printed strings. Lines are prefixed with - / + / ; empty when the two inputs are byte-identical.