manifestEquals(expected) {
            let manifest = JSON.parse(
                File.find(`test/fixtures/app/dist/mix-manifest.json`).read()
            );

            t.deepEqual(Object.keys(manifest).sort(), Object.keys(expected).sort());

            Object.keys(expected).forEach(key => {
                t.true(new RegExp(expected[key]).test(manifest[key]));
            });
        }
Verify that the mix manifest is the same as `expected`

@param {Record<string, string>} expected