react-native-webview/examples/WebTest/e2e/testWebView.spec.js

import {Platform} from 'react-native';

describe('WebView basic test', () => {
  beforeEach(async () => {
    await device.launchApp({newInstance: true});
  });

  it('should not have a redbox visible', async () => {
    const platform = Platform.select({
      ios: 'RCTRedBoxWindow',
      android: undefined, // TODO -- need to figure out what RedBox is on Android
    });
    if (platform) {
      expect(element(by.type(platform))).toNotExist();
    }

    // so there's at least one assertion
    expect(true).toBe(true);
  });

  it('should have a webview', async () => {
    await expect(element(by.id('test_webview'))).toBeVisible();
  });

  it('should respond to injectJavaScript', async () => {
    const hello = await element(by.id('hello'));
    await expect(hello).toHaveText('No hello yet');
    await element(by.id('test_trigger_button')).tap();
    await waitFor(hello)
      .toHaveText('Hello from the webview!')
      .withTimeout(10000);
  });
});