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Debug the App

In this exercise, you will be challenged to debug a provided project so that it can run as intended.

ErrorProject.zip

As a programmer, you’re going to spend a lot of time debugging code. By debugging your scripts on a regular basis, you’ll improve your code comprehension and be able to anticipate problems during the development process. In this challenge, you’ll be tasked with debugging an existing project and making it run as intended. 

Overview

To begin this challenge, you must first download the challenge assets and import them into a new Unity project:

 To unzip the contents of the folder, right-click the folder and select 

 (macOS: double-click the zipped folder). Inside you will find ErrorProject.unitypackage.

While it is possible to view the contents of a folder while it’s still zipped, the data is still compressed. Attempting to import the contents of the 

folder while it’s still zipped will result in an error message in Unity. Ensure that you have unzipped the folder before proceeding to the next step.

 using the 3D template —  remember to use one of the supported versions of Unity, such as 2022.3 LTS or 6000.0 LTS.

Download the provided assets and import them into a new Unity project

Before you begin debugging the project, take a few minutes to learn all you can about it. As soon as you import the .unitypackage, you’ll see two error messages appear in the Console window. These errors will prevent you from testing the scene, so try to determine what the project does based on the contents of the Hierarchy in the included scene and the script attached to the TextDisplay object. 

Review the project

Once you feel confident that you understand what the app is trying to do, make changes to the scene and script as needed so that the code compiles and you’re able to test the scene. What you see in the Game view should make it clear whether or not your application is fully fixed. 

Debug the app

Once your app is fully functioning, you will create a WebGL build of your project, upload it to Unity Play, and then complete this challenge by linking your submission below. To do so:

Ensure that your version of Unity has the WebGL module installed. 

  Install the WebGL Publisher package. This package will allow you to easily publish your project on Unity Play. If you aren’t sure if you have the package or don’t know how to add it, refer to 

 button and wait until the process finishes.

  Create a WebGL build of your project. This may take a few minutes, depending on your computer. If you need help creating the build, refer to step 3 of 

  Publish your WebGL build on Unity Play. 

  Copy your Unity Play link, and paste it below! 

Create a WebGL build of the debugged app

You’ll know you’re successful if you’ve met these criteria:


There are no errors or warnings present in the Editor console.

You are able to press Play in the Editor and see the active scene.

You have created a WebGL build of your project.

You have uploaded the WebGL build to Unity Play.

You’ve copied your Unity Play link for submission.

Criteria

Congratulations on completing the second mission in the Junior Programmer learning pathway. After completing the final quiz, you will have acquired all of the skills needed to take the Unity Certified User: Programmer certification exam. You can find out more about the exam by visiting the 

Next steps

Submission

Control the execution of code with common logic structures 

Level 1 Application Scripting

Joy Horvath

Instructional Designer

Identify and resolve common programming errors, such as null reference exceptions, logical errors, and misuse of API calls.

Level 1 Debugging

Implement simple logic in code by using if and if-else statements

Control the execution of code by using logical operators such as AND and OR in conditional statements

Control how many times certain lines of code run by using for loops, foreach loops, and while loops

Control the order and timing of executed code by using coroutines

Control the execution of code by using switch statements

Modify the values of numeric variables by using mathematical operators

Control the execution of code with common logic structures

Select the appropriate common Unity methods to use, e.g., Awake, Start, Update, FixedUpdate, Collision, and Trigger Events, given a desired feature to code

Achieve a desired result by using Unity API methods, given Unity’s script documentation

Achieve a desired result with different parameters by using various method overloads

Distinguish a correct use of any given Unity API method from an incorrect use

Control or trigger the state of components, such as an Animator Controller, Light, AudioSource, or User Interface element by using appropriate methods

Construct an input listener, given a scenario where a specific type of input is required

Print a message consisting of concatenated strings and variable values to the console by using Unity's Debug.Log method

Compose scripts that utilize various APIs

Initialize variables of a given data type, including ints, floats, doubles, bools, strings, arrays, lists, and dictionaries

Select the correct data type for a variable in a given situation

Select appropriate variable modifiers including public, private, static, protected, and const

Implement appropriate data types

Deduce the purpose and expected result of a given block of code

Accomplish a specific task by constructing a viable method declaration, given a list of keywords and syntax elements

Structure methods by using void and return

Demonstrate ability to implement a given feature in code by recommending data types and logic flow for a new method

Write code that integrates into an existing system

Given a particular feature description (e.g. an object spawner, a difficulty select menu, a loading screen, etc.), recommend an appropriate high-level system for its implementation (e.g. what data types would be required, what would be the logic flow, etc.)

Evaluate the efficacy of a finished prototype based on its design criteria

Prototype new concepts

Reduce redundancy and improve code's readability by correctly naming variables and methods

Describe common naming conventions including PascalCase and camelCase

Cultivate a code style that is efficient and easy to read

Identify bugs caused by failure to use the correct object lifecycle method, such as Awake, Start, or OnEnable

Diagnose and fix code that compiles, but fails to perform as expected

Locate a bug in code that produces a compilation error

Recommend the fix for a compilation error

Recognize when a new namespace needs to be imported

Diagnose and fix common compilation errors

Identify errors related to the incorrect calling of a Unity API method, including incorrect use of returns or parameters

Identify code related to the incorrect implementation of a particular method by using a reference from Unity's Scripting API

Identify errors related to the incorrect calling of a Unity API method, including incorrect use of returns or parameters Identify code related to the incorrect implementation of a particular method by using a reference from Unity's Scripting API

Diagnose and fix compilation errors related to Unity’s Scripting API

Identify errors caused by a null variable

Identify an issue in which code refers to a GameObject that has been destroyed

Identify an out of range exception

Diagnose and fix the cause of an exception

2.  To unzip the contents of the folder, right-click the folder and select Extract All (macOS: double-click the zipped folder). Inside you will find ErrorProject.unitypackage.

Note: While it is possible to view the contents of a folder while it’s still zipped, the data is still compressed. Attempting to import the contents of the Error Project folder while it’s still zipped will result in an error message in Unity. Ensure that you have unzipped the folder before proceeding to the next step.

3.  Create a new Unity project using the 3D template —  remember to use one of the supported versions of Unity, such as 2022.3 LTS or 6000.0 LTS.

4. Import ErrorProject.unitypackage into your new 3D template project. 

2.  Ensure that your version of Unity has the WebGL module installed. 

3.  Install the WebGL Publisher package. This package will allow you to easily publish your project on Unity Play. If you aren’t sure if you have the package or don’t know how to add it, refer to this tutorial.

4.  Select File > Build Profiles from the main menu. Under the Platforms section, select Web, then select the Switch Platform button and wait until the process finishes.

5.  Create a WebGL build of your project. This may take a few minutes, depending on your computer. If you need help creating the build, refer to step 3 of Getting started with Unity Web.

6.  Publish your WebGL build on Unity Play. 

7.  Copy your Unity Play link, and paste it below! 

Congratulations on completing the second mission in the Junior Programmer learning pathway. After completing the final quiz, you will have acquired all of the skills needed to take the Unity Certified User: Programmer certification exam. You can find out more about the exam by visiting the certification page. 

Unity Version 6.0