lodash/test/isArrayBuffer.spec.ts

import assert from 'node:assert';
import lodashStable from 'lodash';
import { arrayBuffer, falsey, stubFalse, args, slice, symbol, realm } from './utils';
import isArrayBuffer from '../src/isArrayBuffer';

describe('isArrayBuffer', () => {
    it('should return `true` for array buffers', () => {
        if (ArrayBuffer) {
            assert.strictEqual(isArrayBuffer(arrayBuffer), true);
        }
    });

    it('should return `false` for non array buffers', () => {
        const expected = lodashStable.map(falsey, stubFalse);

        const actual = lodashStable.map(falsey, (value, index) =>
            index ? isArrayBuffer(value) : isArrayBuffer(),
        );

        assert.deepStrictEqual(actual, expected);

        assert.strictEqual(isArrayBuffer(args), false);
        assert.strictEqual(isArrayBuffer([1]), false);
        assert.strictEqual(isArrayBuffer(true), false);
        assert.strictEqual(isArrayBuffer(new Date()), false);
        assert.strictEqual(isArrayBuffer(new Error()), false);
        assert.strictEqual(isArrayBuffer(slice), false);
        assert.strictEqual(isArrayBuffer({ a: 1 }), false);
        assert.strictEqual(isArrayBuffer(1), false);
        assert.strictEqual(isArrayBuffer(/x/), false);
        assert.strictEqual(isArrayBuffer('a'), false);
        assert.strictEqual(isArrayBuffer(symbol), false);
    });

    it('should work with array buffers from another realm', () => {
        if (realm.arrayBuffer) {
            assert.strictEqual(isArrayBuffer(realm.arrayBuffer), true);
        }
    });
});