rediff

rediff compares Facet values structurally and reports detailed diffs.

It is useful in tests where PartialEq is unavailable, too blunt, or gives too little context when values differ. Rediff walks the reflected shape of both values and renders the difference with paths, structure, and terminal-friendly formatting.

use facet::Facet;
use rediff::assert_same;

#[derive(Facet)]
struct Config {
    host: String,
    port: u16,
}

let expected = Config {
    host: "localhost".to_owned(),
    port: 8080,
};

let actual = Config {
    host: "localhost".to_owned(),
    port: 8080,
};

assert_same!(expected, actual);

Source: rediff