packages/util/src/is/undefined.spec.ts
// Copyright 2017-2024 @polkadot/util authors & contributors
// SPDX-License-Identifier: Apache-2.0
/// <reference types="@polkadot/dev-test/globals.d.ts" />
import { perf } from '../test/index.js';
import { isUndefined } from './index.js';
describe('isUndefined', (): void => {
it('returns true on undefined values', (): void => {
expect(
isUndefined()
).toEqual(true);
});
it('returns false on defined values', (): void => {
expect(
isUndefined(null)
).toEqual(false);
});
perf('isUndefined', 10_000_000, [[null]], isUndefined);
});