Why testing ensures app quality in React Native - Build It to Prove It

Build: Testing Explanation Screen

This screen explains why testing is important for app quality with a simple message and a button to show an example alert.

Target UI

-------------------------
| Testing Importance    |
|-----------------------|
| Why testing matters:  |
| Improves app quality  |
| and user experience.  |
|                       |
| [Show Example Alert]   |
-------------------------

Display a title at the top

Show a short explanation text about testing importance

Add a button labeled 'Show Example Alert'

When button is pressed, show an alert with a message about testing

Starter Code

React Native

import React from 'react';
import { View, Text, Button, Alert, StyleSheet } from 'react-native';

export default function TestingScreen() {
  return (
    <View style={styles.container}>
      {/* TODO: Add title text here */}
      {/* TODO: Add explanation text here */}
      {/* TODO: Add button that shows alert on press */}
    </View>
  );
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
    justifyContent: 'center',
    alignItems: 'center',
    padding: 20
  },
  title: {
    fontSize: 24,
    fontWeight: 'bold',
    marginBottom: 20
  },
  explanation: {
    fontSize: 16,
    textAlign: 'center',
    marginBottom: 30
  }
});

Task 1

Task 2

Task 3

Solution

React Native

import React from 'react';
import { View, Text, Button, Alert, StyleSheet } from 'react-native';

export default function TestingScreen() {
  const showAlert = () => {
    Alert.alert('Testing helps find bugs early and keeps the app reliable!');
  };

  return (
    <View style={styles.container}>
      <Text style={styles.title}>Testing Importance</Text>
      <Text style={styles.explanation}>Why testing matters: Improves app quality and user experience.</Text>
      <Button title="Show Example Alert" onPress={showAlert} />
    </View>
  );
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
    justifyContent: 'center',
    alignItems: 'center',
    padding: 20
  },
  title: {
    fontSize: 24,
    fontWeight: 'bold',
    marginBottom: 20
  },
  explanation: {
    fontSize: 16,
    textAlign: 'center',
    marginBottom: 30
  }
});

This screen uses simple React Native components to explain why testing is important. The Text components show the title and explanation. The Button triggers an alert that gives a friendly message about testing benefits. This helps learners see how UI and interaction work together to communicate app quality concepts.

Final Result

Completed Screen

-------------------------
| Testing Importance    |
|-----------------------|
| Why testing matters:  |
| Improves app quality  |
| and user experience.  |
|                       |
| [Show Example Alert]   |
-------------------------

When user taps 'Show Example Alert' button, an alert pops up with the message: 'Testing helps find bugs early and keeps the app reliable!'

Stretch Goal

Add a toggle to switch between light and dark mode for the screen

💡 Hint

Use React state to track mode and change background and text colors accordingly