Struct Golden 

pub struct Golden { /* private fields */ }

A stored snapshot of an expected text output.

Example

use dev_fixtures::golden::Golden;
let dir = tempfile::tempdir().unwrap();
let path = dir.path().join("snap.txt");
std::fs::write(&path, "hello\n").unwrap();

let g = Golden::new(&path);
let check = g.compare("greet", "hello\n");
assert!(matches!(check.verdict, dev_report::Verdict::Pass));

Implementations

impl Golden

pub fn new(path: impl Into<PathBuf>) -> Self

Build a golden bound to a path on disk. The path may not exist yet; on first run the snapshot is created and verdict is Skip with a created tag.

pub fn compare(&self, name: impl AsRef<str>, actual: &str) -> CheckResult

Compare actual against the stored snapshot and emit a CheckResult tagged fixtures and golden.

Verdicts:

• Snapshot matches -> Pass.
• Snapshot missing -> Skip with created tag (the snapshot is written to disk for the first time).
• Snapshot mismatch + update mode -> Skip with updated tag (the snapshot is overwritten with actual).
• Snapshot mismatch (default) -> Fail (Error) with regression tag, line-based diff in detail, and full actual/expected as snippet evidence.

pub fn path(&self) -> &Path

The path this golden is bound to.