48 lines
1.7 KiB
TypeScript
48 lines
1.7 KiB
TypeScript
// Copyright 2017-2019 @polkadot/util authors & contributors
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// This software may be modified and distributed under the terms
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// of the Apache-2.0 license. See the LICENSE file for details.
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import { promisify } from '.';
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describe('promisify', (): void => {
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it('handles functions with no parameters (resolve)', (): Promise<void> => {
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const fn = (cb: (error: null, value: [boolean, string, number]) => void): void =>
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cb(null, [true, 'test', 1]);
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return promisify(null, fn).then((result): void => {
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expect(result).toEqual([true, 'test', 1]);
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});
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});
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it('handles functions with no parameters (reject)', (): Promise<void> => {
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const fn = (cb: (error: Error, result?: boolean) => void): void =>
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cb(new Error('test reject'));
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return promisify(null, fn)
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.then((): void => {
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throw new Error('Received unexpected result');
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})
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.catch((error): void => {
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expect(error.message).toEqual('test reject');
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});
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});
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it('handles functions with parameters (resolve)', (): Promise<void> => {
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const fn = (a: number, b: boolean, cb: (error: Error | null, result?: [number, boolean]) => void): void =>
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cb(null, [a, b]);
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return promisify(null, fn, 2, false).then((result: [number, boolean]): void => {
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expect(result).toEqual([2, false]);
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});
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});
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it('handles functions with parameters (reject)', (): Promise<void> => {
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const fn = (a: number, b: boolean, c: string, cb: (error: Error | null, result?: [number, boolean, string]) => void): void =>
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cb(new Error(`test reject: ${a},${b},${c}`));
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return promisify(null, fn, 3, 'string', true).catch((error: Error): void => {
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expect(error.message).toEqual('test reject: 3,string,true');
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});
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});
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});
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