Example jest testing fails out of the box

When I run npm test after installing the example test in App.test.js is discovered and fails.

I’m running OSX 10.13.6, npm 6.4.1, node 10.11.0

Steps to reproduce

1. Go to root directory in terminal and run npm test, select a option to run all tests from the command line prompt

Expected result

Tests should run and pass.

Actual result

The test is discovered and fails:

  ● Test suite failed to run

    /Users/jfunk/Documents/Code/git/RN-PVP/node_modules/redux-persist/es/integration/react.js:9
    import React, { PureComponent } from 'react'; // eslint-disable-line import/no-unresolved
           ^^^^^

    SyntaxError: Unexpected identifier

      4 | import { Provider } from 'react-redux';
      5 | import { Router, Stack } from 'react-native-router-flux';
    > 6 | import { PersistGate } from 'redux-persist/es/integration/react';
        | ^
      7 |
      8 | import { Root, StyleProvider } from 'native-base';
      9 | import getTheme from '../../native-base-theme/components';

      at ScriptTransformer._transformAndBuildScript (node_modules/jest-runtime/build/script_transformer.js:403:17)
      at Object.<anonymous> (src/native/index.js:6:1)

Test Suites: 1 failed, 1 total

[j-funk]

I eventually worked around this with:

“jest”: { “preset”: “jest-expo”, “transformIgnorePatterns”: [] },

From this issue.

[j-funk]

Also add jest.useFakeTimers(); to the test file.

import React from 'react';
import renderer from 'react-test-renderer';
import App from './App';

jest.useFakeTimers();

it('renders without crashing', () => {
  const rendered = renderer.create(<App />).toJSON();
  expect(rendered).toBeTruthy();
});