assert
The assert
module in Node.js provides a number of useful assertions that are useful when building tests.
import { strictEqual, deepStrictEqual, ok, doesNotReject } from "node:assert";
strictEqual(1, 1); // ok!strictEqual(1, "1"); // fails! throws AssertionError
deepStrictEqual({ a: { b: 1 } }, { a: { b: 1 } }); // ok!deepStrictEqual({ a: { b: 1 } }, { a: { b: 2 } }); // fails! throws AssertionError
ok(true); // ok!ok(false); // fails! throws AssertionError
await doesNotReject(async () => {}); // ok!await doesNotReject(async () => { throw new Error("boom");}); // fails! throws AssertionError
Refer to the Node.js documentation for assert
โ for more information.