132 lines
4.1 KiB
JavaScript
132 lines
4.1 KiB
JavaScript
/* eslint-disable global-require */
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import path from 'path';
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import axios from '~/lib/utils/axios_utils';
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const absPath = path.join.bind(null, __dirname);
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jest.mock('fs');
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jest.mock('readdir-enhanced');
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describe('mocks_helper.js', () => {
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let setupManualMocks;
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const setMock = jest.fn().mockName('setMock');
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let fs;
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let readdir;
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beforeAll(() => {
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jest.resetModules();
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jest.setMock = jest.fn().mockName('jest.setMock');
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fs = require('fs');
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readdir = require('readdir-enhanced');
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// We need to provide setupManualMocks with a mock function that pretends to do the setup of
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// the mock. This is because we can't mock jest.setMock across files.
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setupManualMocks = () => require('./mocks_helper').setupManualMocks(setMock);
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});
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afterEach(() => {
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fs.existsSync.mockReset();
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readdir.sync.mockReset();
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setMock.mockReset();
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});
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it('enumerates through mock file roots', () => {
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setupManualMocks();
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expect(fs.existsSync).toHaveBeenCalledTimes(1);
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expect(fs.existsSync).toHaveBeenNthCalledWith(1, absPath('ce'));
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expect(readdir.sync).toHaveBeenCalledTimes(0);
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});
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it("doesn't traverse the directory tree infinitely", () => {
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fs.existsSync.mockReturnValue(true);
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readdir.sync.mockReturnValue([]);
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setupManualMocks();
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const readdirSpy = readdir.sync;
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expect(readdirSpy).toHaveBeenCalled();
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readdirSpy.mock.calls.forEach(call => {
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expect(call[1].deep).toBeLessThan(100);
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});
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});
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it('sets up mocks for CE (the ~/ prefix)', () => {
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fs.existsSync.mockImplementation(root => root.endsWith('ce'));
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readdir.sync.mockReturnValue(['root.js', 'lib/utils/util.js']);
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setupManualMocks();
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expect(readdir.sync).toHaveBeenCalledTimes(1);
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expect(readdir.sync.mock.calls[0][0]).toBe(absPath('ce'));
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expect(setMock).toHaveBeenCalledTimes(2);
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expect(setMock).toHaveBeenNthCalledWith(1, '~/root', './ce/root');
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expect(setMock).toHaveBeenNthCalledWith(2, '~/lib/utils/util', './ce/lib/utils/util');
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});
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it('sets up mocks for all roots', () => {
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const files = {
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[absPath('ce')]: ['root', 'lib/utils/util'],
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[absPath('node')]: ['jquery', '@babel/core'],
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};
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fs.existsSync.mockReturnValue(true);
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readdir.sync.mockImplementation(root => files[root]);
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setupManualMocks();
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expect(readdir.sync).toHaveBeenCalledTimes(1);
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expect(readdir.sync.mock.calls[0][0]).toBe(absPath('ce'));
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expect(setMock).toHaveBeenCalledTimes(2);
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expect(setMock).toHaveBeenNthCalledWith(1, '~/root', './ce/root');
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expect(setMock).toHaveBeenNthCalledWith(2, '~/lib/utils/util', './ce/lib/utils/util');
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});
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it('fails when given a virtual mock', () => {
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fs.existsSync.mockImplementation(p => p.endsWith('ce'));
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readdir.sync.mockReturnValue(['virtual', 'shouldntBeImported']);
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setMock.mockImplementation(() => {
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throw new Error('Could not locate module');
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});
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expect(setupManualMocks).toThrow(
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new Error("A manual mock was defined for module ~/virtual, but the module doesn't exist!"),
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);
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expect(readdir.sync).toHaveBeenCalledTimes(1);
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expect(readdir.sync.mock.calls[0][0]).toBe(absPath('ce'));
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});
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describe('auto-injection', () => {
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it('handles ambiguous paths', () => {
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jest.isolateModules(() => {
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const axios2 = require('../../../app/assets/javascripts/lib/utils/axios_utils').default;
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expect(axios2.isMock).toBe(true);
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});
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});
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it('survives jest.isolateModules()', done => {
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jest.isolateModules(() => {
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const axios2 = require('~/lib/utils/axios_utils').default;
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expect(axios2.isMock).toBe(true);
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done();
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});
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});
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it('can be unmocked and remocked', () => {
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jest.dontMock('~/lib/utils/axios_utils');
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jest.resetModules();
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const axios2 = require('~/lib/utils/axios_utils').default;
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expect(axios2).not.toBe(axios);
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expect(axios2.isMock).toBeUndefined();
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jest.doMock('~/lib/utils/axios_utils');
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jest.resetModules();
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const axios3 = require('~/lib/utils/axios_utils').default;
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expect(axios3).not.toBe(axios2);
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expect(axios3.isMock).toBe(true);
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});
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});
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});
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