trying to fix travis builds

playground/e2e/app.test.js

     global.simulator.relaunchApp(done);
   });
 
-  it('shows welcome screen', (done) => {
-    expect(element(by.label('React Native Navigation!'))).toBeVisible();
-    done();
+  it('shows welcome screen', () => {
+    expect(elementByLabel('React Native Navigation!')).toBeVisible();
+  });
+
+  xit('switch to tab based app', () => {
+    elementByLabel('Switch to tab based app').tap();
+    expect(elementByLabel('This is a tab screen')).toBeVisible();
   });
 });
+
+function elementByLabel(label) {
+  return element(by.label(label));
+}

playground/scripts/e2e.ios.js

   shellUtils.exec.execSync(`echo 'travis_fold:start:xcodebuild'`);
   const cmd = `RCT_NO_LAUNCH_PACKAGER=true
           cd ios && xcodebuild
-            -scheme ${scheme} 
-            ${release ? 'clean build' : 'build'} 
+            -scheme ${scheme}
+            ${release ? 'clean build' : 'build'}
             -project playground.xcodeproj
             -sdk iphonesimulator
             -derivedDataPath ./DerivedData/playground`;
     shellUtils.exec.execSync(`detoxAppBuildPath="${detoxAppBuildPath}"
                               BABEL_ENV=test
                               ./node_modules/mocha/bin/mocha e2e
-                                --timeout 240000
+                                --timeout ${10 * 60 * 1000}
                                 --recursive
                                 --compilers js:babel-register`);
   } finally {

playground/src/containers/SimpleTabScreen.js

+import React, {Component} from 'react';
+import {View, Text} from 'react-native';
+
+export default class SimpleTabScreen extends Component {
+  render() {
+    return (
+      <View style={styles.root}>
+        <Text style={styles.h1}>{`This is a tab screen`}</Text>
+      </View>
+    );
+  }
+}
+
+const styles = {
+  root: {
+    flexGrow: 1,
+    justifyContent: 'center',
+    alignItems: 'center',
+    backgroundColor: '#f5fcff'
+  },
+  h1: {
+    fontSize: 24,
+    textAlign: 'center',
+    margin: 10
+  }
+};

playground/src/containers/index.js

 import Navigation from 'react-native-navigation';
 
 import WelcomeScreen from './WelcomeScreen';
+import SimpleTabScreen from './SimpleTabScreen';
 
 export function registerContainers() {
   Navigation.registerContainer(`com.example.WelcomeScreen`, () => WelcomeScreen);
+  Navigation.registerContainer(`com.example.SimpleTabScreen`, () => SimpleTabScreen);
 }