source: imaps-frontend/node_modules/is-data-view/test/index.js

'use strict';

var test = require('tape');
var isDataView = require('../');

var hasToStringTag = require('has-tostringtag/shams')();
var generators = require('make-generator-function')();
var arrowFns = require('make-arrow-function').list();
var forEach = require('for-each');
var v = require('es-value-fixtures');
var inspect = require('object-inspect');
var availableTypedArrays = require('available-typed-arrays')();

test('not DataViews', function (t) {
        forEach([].concat(
                // @ts-expect-error TS sucks at [].concat
                v.primitives,
                v.objects,
                function () {},
                generators,
                arrowFns,
                []
        ), /** @type {(nonDV: unknown) => void} */ function (nonDV) {
                t.equal(
                        isDataView(nonDV),
                        false,
                        inspect(nonDV) + ' is not a DataView'
                );
        });

        forEach(availableTypedArrays, function (typedArray) {
                var TA = global[typedArray];
                var ta = new TA(8);
                t.equal(isDataView(ta), false, inspect(ta) + ' is not a DataView');
        });

        t.end();
});

test('@@toStringTag', { skip: !hasToStringTag }, function (t) {
        forEach(availableTypedArrays, function (typedArray) {
                // @ts-expect-error
                var fakeTypedArray = [];
                // @ts-expect-error
                fakeTypedArray[Symbol.toStringTag] = typedArray;
                // @ts-expect-error
                t.notOk(isDataView(fakeTypedArray), 'faked ' + typedArray + ' is not typed array');
        });

        t.end();
});

test('Data Views', { skip: typeof DataView !== 'function' }, function (t) {
        var ab = new ArrayBuffer(1);
        var dv = new DataView(ab);

        t.equal(isDataView(dv), true, inspect(dv) + ' is a DataView');

        t.end();
});