1  'use strict';
 2  
 3  var callBind = require('../');
 4  var hasStrictMode = require('has-strict-mode')();
 5  var forEach = require('for-each');
 6  var inspect = require('object-inspect');
 7  var v = require('es-value-fixtures');
 8  
 9  var test = require('tape');
10  
11  test('callBindBasic', function (t) {
12  	forEach(v.nonFunctions, function (nonFunction) {
13  		t['throws'](
14  			// @ts-expect-error
15  			function () { callBind([nonFunction]); },
16  			TypeError,
17  			inspect(nonFunction) + ' is not a function'
18  		);
19  	});
20  
21  	var sentinel = { sentinel: true };
22  	/** @type {<T, A extends number, B extends number>(this: T, a: A, b: B) => [T | undefined, A, B]} */
23  	var func = function (a, b) {
24  		// eslint-disable-next-line no-invalid-this
25  		return [!hasStrictMode && this === global ? undefined : this, a, b];
26  	};
27  	t.equal(func.length, 2, 'original function length is 2');
28  
29  	/** type {(thisArg: unknown, a: number, b: number) => [unknown, number, number]} */
30  	var bound = callBind([func]);
31  	/** type {((a: number, b: number) => [typeof sentinel, typeof a, typeof b])} */
32  	var boundR = callBind([func, sentinel]);
33  	/** type {((b: number) => [typeof sentinel, number, typeof b])} */
34  	var boundArg = callBind([func, sentinel, /** @type {const} */ (1)]);
35  
36  	// @ts-expect-error
37  	t.deepEqual(bound(), [undefined, undefined, undefined], 'bound func with no args');
38  
39  	// @ts-expect-error
40  	t.deepEqual(func(), [undefined, undefined, undefined], 'unbound func with too few args');
41  	// @ts-expect-error
42  	t.deepEqual(bound(1, 2), [hasStrictMode ? 1 : Object(1), 2, undefined], 'bound func too few args');
43  	// @ts-expect-error
44  	t.deepEqual(boundR(), [sentinel, undefined, undefined], 'bound func with receiver, with too few args');
45  	// @ts-expect-error
46  	t.deepEqual(boundArg(), [sentinel, 1, undefined], 'bound func with receiver and arg, with too few args');
47  
48  	t.deepEqual(func(1, 2), [undefined, 1, 2], 'unbound func with right args');
49  	t.deepEqual(bound(1, 2, 3), [hasStrictMode ? 1 : Object(1), 2, 3], 'bound func with right args');
50  	t.deepEqual(boundR(1, 2), [sentinel, 1, 2], 'bound func with receiver, with right args');
51  	t.deepEqual(boundArg(2), [sentinel, 1, 2], 'bound func with receiver and arg, with right arg');
52  
53  	// @ts-expect-error
54  	t.deepEqual(func(1, 2, 3), [undefined, 1, 2], 'unbound func with too many args');
55  	// @ts-expect-error
56  	t.deepEqual(bound(1, 2, 3, 4), [hasStrictMode ? 1 : Object(1), 2, 3], 'bound func with too many args');
57  	// @ts-expect-error
58  	t.deepEqual(boundR(1, 2, 3), [sentinel, 1, 2], 'bound func with receiver, with too many args');
59  	// @ts-expect-error
60  	t.deepEqual(boundArg(2, 3), [sentinel, 1, 2], 'bound func with receiver and arg, with too many args');
61  
62  	t.end();
63  });