NewMessageForm.js.diff

 import React, { Component } from 'react';
 import {
+  TextInput,
   View,
 } from 'react-native';

 export default class NewMessageForm extends Component {
   render() {
     return (
       <View>
+        <TextInput
+          testID="messageText"
+        />
       </View>
     );
   }
 }