johnny-cli/src/start/__tests__/index.js

CLI for Johnny Deps

import fs from 'fs';
import startCmd from '../';
jest.mock('fs');
jest.mock('promptly');

const
	mockJohnnyRemove = jest.fn(),
	mockAPIStart = jest.fn(),
	name = 'newdll',
	packages = {package: 'version'};

jest.mock('API', () => () => ({
	requestToken: () => new Promise(resolve => resolve('token')),
	start       : mockAPIStart,
}));

jest.mock('JohnnyFile', () => () => ({
	create: function() { return this; },
	get   : new Function,
	remove: mockJohnnyRemove,
}));

describe('"start" command', () => {
	beforeEach(() => fs.__setMockFiles({'./package.json': `{"dependencies": ${JSON.stringify(packages)}}`}));

	it('sends packages names and versions to API', async () => {
		fs.__setMockFiles({'./package.json': `{"dependencies": ${JSON.stringify(packages)}}`});
		await startCmd('newdll');

		// Pass unresolved Promise in order to prevent program flow to go further
		mockAPIStart.mockImplementation(new Promise(new Function));

		expect(mockAPIStart).toHaveBeenCalledWith({name, packages: packages});
	});

	it('removes johnny config file if API request failed', async () => {
		mockAPIStart.mockImplementation(() => new Promise((resolve, reject) => reject()));
		await startCmd('newdll');
		expect(mockJohnnyRemove).toHaveBeenCalled();
	});
});