'use strict'; require('../common'); const assert = require('assert'); const { performance } = require('perf_hooks'); // Test toJSON for performance object { assert.strictEqual(typeof performance.toJSON, 'function'); const jsonObject = performance.toJSON(); assert.strictEqual(typeof jsonObject, 'object'); assert.strictEqual(jsonObject.timeOrigin, performance.timeOrigin); assert.strictEqual(typeof jsonObject.nodeTiming, 'object'); }