Function expectSnapshotState

test/FileSystemInfo.unittest.js:232–294

(
		/** @type {IFs} */ fs,
		/** @type {Snapshot | null | undefined} */ snapshot,
		/** @type {boolean} */ expected,
		/** @type {(err?: Error | null) => void} */ callback
	)

	};

	const expectSnapshotState = (
		/** @type {IFs} */ fs,
		/** @type {Snapshot | null | undefined} */ snapshot,
		/** @type {boolean} */ expected,
		/** @type {(err?: Error | null) => void} */ callback
	) => {
		const fsInfo = createFsInfo(fs);
		const details = (/** @type {unknown} */ snapshot) => `${
			/** @type {string[]} */ (
				/** @type {Record<string, unknown>} */ (fsInfo).logs
			).join(class="st">"\n")
		}
${util.inspect(snapshot, false, Infinity, true)}`;
		fsInfo.checkSnapshotValid(
			/** @type {Snapshot} */ (snapshot),
			(err, valid) => {
				if (err) return callback(err);
				if (valid !== expected) {
					return callback(
						new Error(`Expected snapshot to be ${
							expected ? class="st">"valid" : class="st">"invalid"
						} but it is ${valid ? class="st">"valid" : class="st">"invalid"}:
${details(snapshot)}`)
					);
				}
				class="cm">// Another try to check if direct caching works
				fsInfo.checkSnapshotValid(
					/** @type {Snapshot} */ (snapshot),
					(err, valid) => {
						if (err) return callback(err);
						if (valid !== expected) {
							return callback(
								new Error(`Expected snapshot lead to the same result when directly cached:
${details(snapshot)}`)
							);
						}
						class="cm">// Another try to check if indirect caching works
						fsInfo.checkSnapshotValid(
							/** @type {Snapshot} */ (
								/** @type {unknown} */ (
									clone(
										/** @type {Record<string, unknown>} */ (
											/** @type {unknown} */ (snapshot)
										)
									)
								)
							),
							(err, valid) => {
								if (err) return callback(err);
								if (valid !== expected) {
									return callback(
										new Error(`Expected snapshot lead to the same result when indirectly cached:
${details(snapshot)}`)
									);
								}
								callback();
							}
						);