source: imaps-frontend/node_modules/call-bind-apply-helpers/test/index.js

'use strict';

var callBind = require('../');
var hasStrictMode = require('has-strict-mode')();
var forEach = require('for-each');
var inspect = require('object-inspect');
var v = require('es-value-fixtures');

var test = require('tape');

test('callBindBasic', function (t) {
        forEach(v.nonFunctions, function (nonFunction) {
                t['throws'](
                        // @ts-expect-error
                        function () { callBind([nonFunction]); },
                        TypeError,
                        inspect(nonFunction) + ' is not a function'
                );
        });

        var sentinel = { sentinel: true };
        /** @type {<T>(this: T, a: number, b: number) => [T | undefined, number, number]} */
        var func = function (a, b) {
                // eslint-disable-next-line no-invalid-this
                return [!hasStrictMode && this === global ? undefined : this, a, b];
        };
        t.equal(func.length, 2, 'original function length is 2');

        /** type {(thisArg: unknown, a: number, b: number) => [unknown, number, number]} */
        var bound = callBind([func]);
        /** type {((a: number, b: number) => [sentinel, typeof a, typeof b])} */
        var boundR = callBind([func, sentinel]);
        /** type {((b: number) => [sentinel, number, typeof b])} */
        var boundArg = callBind([func, sentinel, 1]);

        // @ts-expect-error
        t.deepEqual(bound(), [undefined, undefined, undefined], 'bound func with no args');

        // @ts-expect-error
        t.deepEqual(func(), [undefined, undefined, undefined], 'unbound func with too few args');
        // @ts-expect-error
        t.deepEqual(bound(1, 2), [hasStrictMode ? 1 : Object(1), 2, undefined], 'bound func too few args');
        // @ts-expect-error
        t.deepEqual(boundR(), [sentinel, undefined, undefined], 'bound func with receiver, with too few args');
        // @ts-expect-error
        t.deepEqual(boundArg(), [sentinel, 1, undefined], 'bound func with receiver and arg, with too few args');

        t.deepEqual(func(1, 2), [undefined, 1, 2], 'unbound func with right args');
        t.deepEqual(bound(1, 2, 3), [hasStrictMode ? 1 : Object(1), 2, 3], 'bound func with right args');
        t.deepEqual(boundR(1, 2), [sentinel, 1, 2], 'bound func with receiver, with right args');
        t.deepEqual(boundArg(2), [sentinel, 1, 2], 'bound func with receiver and arg, with right arg');

        // @ts-expect-error
        t.deepEqual(func(1, 2, 3), [undefined, 1, 2], 'unbound func with too many args');
        // @ts-expect-error
        t.deepEqual(bound(1, 2, 3, 4), [hasStrictMode ? 1 : Object(1), 2, 3], 'bound func with too many args');
        // @ts-expect-error
        t.deepEqual(boundR(1, 2, 3), [sentinel, 1, 2], 'bound func with receiver, with too many args');
        // @ts-expect-error
        t.deepEqual(boundArg(2, 3), [sentinel, 1, 2], 'bound func with receiver and arg, with too many args');

        t.end();
});