source: imaps-frontend/node_modules/is-array-buffer/test/index.js

'use strict';

var test = require('tape');
var inspect = require('object-inspect');
var forEach = require('for-each');
var v = require('es-value-fixtures');
var availableTypedArrays = require('available-typed-arrays')();

var isArrayBuffer = require('..');

test('isArrayBuffer', function (t) {
        t.equal(typeof isArrayBuffer, 'function', 'is a function');

        /** @type {unknown[]} */
        var nonABs = [].concat(
                // @ts-expect-error TS sucks with [].concat
                v.primitives,
                v.objects,
                typeof SharedArrayBuffer === 'function' ? new SharedArrayBuffer(0) : []
        );
        forEach(nonABs, function (nonAB) {
                t.equal(isArrayBuffer(nonAB), false, inspect(nonAB) + ' is not an ArrayBuffer');
        });

        t.test('actual ArrayBuffer instances', { skip: typeof ArrayBuffer === 'undefined' }, function (st) {
                // @ts-expect-error TS grumbles about 0 args
                var ab = new ArrayBuffer();
                st.equal(isArrayBuffer(ab), true, inspect(ab) + ' is an ArrayBuffer');

                var ab42 = new ArrayBuffer(42);
                st.equal(isArrayBuffer(ab42), true, inspect(ab42) + ' is an ArrayBuffer');

                var dv = new DataView(ab42);
                st.equal(isArrayBuffer(dv), false, inspect(dv) + ' is not an ArrayBuffer');

                st.end();
        });

        t.test('Typed Arrays', { skip: availableTypedArrays.length === 0 }, function (st) {
                forEach(availableTypedArrays, function (TypedArray) {
                        var ta = new global[TypedArray](0);
                        st.equal(isArrayBuffer(ta.buffer), true, inspect(ta.buffer) + ', the TA\'s buffer, is an ArrayBuffer');
                        st.equal(isArrayBuffer(ta), false, inspect(ta) + ' is not an ArrayBuffer');
                });

                st.end();
        });

        t.end();
});