@johnf/react-native-owl/lib/module/utils/file-exists.test.js

Visual regression testing for React Native

"use strict";

import { promises as fs } from 'fs';
import { fileExists } from "./file-exists.js";
describe('file-exists.ts', () => {
  const accessMock = jest.spyOn(fs, 'access');
  beforeEach(() => {
    accessMock.mockReset();
  });
  it('should check if a file exists - true', async () => {
    accessMock.mockResolvedValueOnce();
    const result = await fileExists('./hello.txt');
    expect(result).toBe(true);
  });
  it('should check if a file exists - false', async () => {
    accessMock.mockRejectedValueOnce(undefined);
    const result = await fileExists('./file-does-not-exist.txt');
    expect(result).toBe(false);
  });
});
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