64 lines
2.6 KiB
JavaScript
64 lines
2.6 KiB
JavaScript
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'use strict';
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var callBind = require('../');
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var hasStrictMode = require('has-strict-mode')();
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var forEach = require('for-each');
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var inspect = require('object-inspect');
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var v = require('es-value-fixtures');
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var test = require('tape');
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test('callBindBasic', function (t) {
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forEach(v.nonFunctions, function (nonFunction) {
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t['throws'](
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// @ts-expect-error
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function () { callBind([nonFunction]); },
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TypeError,
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inspect(nonFunction) + ' is not a function'
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);
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});
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var sentinel = { sentinel: true };
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/** @type {<T, A extends number, B extends number>(this: T, a: A, b: B) => [T | undefined, A, B]} */
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var func = function (a, b) {
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// eslint-disable-next-line no-invalid-this
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return [!hasStrictMode && this === global ? undefined : this, a, b];
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};
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t.equal(func.length, 2, 'original function length is 2');
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/** type {(thisArg: unknown, a: number, b: number) => [unknown, number, number]} */
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var bound = callBind([func]);
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/** type {((a: number, b: number) => [typeof sentinel, typeof a, typeof b])} */
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var boundR = callBind([func, sentinel]);
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/** type {((b: number) => [typeof sentinel, number, typeof b])} */
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var boundArg = callBind([func, sentinel, /** @type {const} */ (1)]);
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// @ts-expect-error
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t.deepEqual(bound(), [undefined, undefined, undefined], 'bound func with no args');
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// @ts-expect-error
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t.deepEqual(func(), [undefined, undefined, undefined], 'unbound func with too few args');
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// @ts-expect-error
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t.deepEqual(bound(1, 2), [hasStrictMode ? 1 : Object(1), 2, undefined], 'bound func too few args');
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// @ts-expect-error
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t.deepEqual(boundR(), [sentinel, undefined, undefined], 'bound func with receiver, with too few args');
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// @ts-expect-error
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t.deepEqual(boundArg(), [sentinel, 1, undefined], 'bound func with receiver and arg, with too few args');
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t.deepEqual(func(1, 2), [undefined, 1, 2], 'unbound func with right args');
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t.deepEqual(bound(1, 2, 3), [hasStrictMode ? 1 : Object(1), 2, 3], 'bound func with right args');
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t.deepEqual(boundR(1, 2), [sentinel, 1, 2], 'bound func with receiver, with right args');
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t.deepEqual(boundArg(2), [sentinel, 1, 2], 'bound func with receiver and arg, with right arg');
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// @ts-expect-error
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t.deepEqual(func(1, 2, 3), [undefined, 1, 2], 'unbound func with too many args');
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// @ts-expect-error
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t.deepEqual(bound(1, 2, 3, 4), [hasStrictMode ? 1 : Object(1), 2, 3], 'bound func with too many args');
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// @ts-expect-error
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t.deepEqual(boundR(1, 2, 3), [sentinel, 1, 2], 'bound func with receiver, with too many args');
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// @ts-expect-error
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t.deepEqual(boundArg(2, 3), [sentinel, 1, 2], 'bound func with receiver and arg, with too many args');
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t.end();
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});
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