@youneed/test-snapshot

Snapshot testing for @youneed/test as a plugin.

import { snapshot, toMatchSnapshot } from "@youneed/test-snapshot";

class Render extends Test() {
  @Test.it() tree() { toMatchSnapshot(buildTree()); }
}

TestApplication().addTests(Render).use(snapshot()).run();

First run writes __snapshots__/<Suite>.snap.json; later runs compare and throw an AssertionError on mismatch. Update with snapshot({ update: true }) or YOUNEED_UPDATE_SNAPSHOTS=1.

• snapshot({ dir?, update? }) — the plugin (.use(...)); tracks the current test so toMatchSnapshot knows its key.
• toMatchSnapshot(value, hint?) — auto-keyed by <test name> <n>; pass hint to disambiguate multiple snapshots in one test.