Start Running Tests

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LibGDX comes with a ton of small test examples. To run and easily analyze these, you need to work directly from the libGDX source.

Running the tests is currently limited to Eclipse, so make sure you have Eclipse setup properly. In addition to this, you will also need:

  • Ant installed and available in your PATH environment variable so you can execute it on the command line
  • GWT Plugin for Eclipse - follow the instructions on the page and install only required and GWT stuff
    • Also make sure that default GWT SDK is 2.6.1. You will probably have to download it hereand install it by going to Window/Eclipse -> Preferences -> Google -> Web Toolkit -> Add and then make sure it is checked.

Getting the Source

To get the sources and all the native libraries for all platforms, perform the following on the command line. You can do the cloning with a Git GUI as well of course:

git clone git://github.com/libgdx/libgdx.git
cd libgdx
ant -f fetch.xml

This fetches all the source code from the git repository, then downloads the native files from the build server via the fetch.xml Ant script. The Git repository does not contain these native libraries to trim down its size, hence the two steps.

To stay up to date you can do the following from within the libgdx directory every now and then:

git pull
ant -f fetch.xml

This will pull in the latest changes from the Git repository, and download the latest native libraries from the build server.

Importing into Eclipse

Once you have the sources and native libraries, you can open Eclipse and import all the projects:

  • Go to File -> Import
  • Choose General -> Existing Projects into Workspace
  • Browse to the libgdx directory and make sure all projects are checked
  • Click Finish

Eclipse now imports all the projects from the libgdx directory. On first import, you usually see errors everywhere. Fear not, that is just Eclipse being silly. To resolve the issues do the following:

  • Go to Project -> Clean
  • Make sure all projects are selected, then click OK
  • Select all projects in the package explorer, then hit F5 to refresh them (vodoo...)
  • There will be a few issues remaining concerning GWT. In the Problems view, right click on each entry saying "The web.xml file does not exist", select Quick Fix and press OK

If you did not run 'ant -f fetch.xml' before this point, you will encounter many errors here due to missing backends.

Also, if you are experiencing errors of the kind "The method (method name) of type (type name) must override a superclass method" and the suggested fix is to "Remove the @Override annotation" then you should go into the project settings and change the Java Compliance Level to something higher than 1.5 .

You are now ready to start the tests or run the demo games.

Running the Demos & Tests

The test examples are contained in the gdx-tests project. This project only contains the source code. To actually start the tests on the desktop you have to run the LwjglTestStarter class, contained in the gdx-tests-lwjgl project. To run the tests on Android simply fire up the gdx-tests-android project in the emulator or on a connected device! To run the tests in your browser fire up the gdx-tests-gwt project. For iOS you'll need a Mac. You can start the gdx-tests-robovm project

For the tests the following steps are used to start the apps

  • Right click one of the projects mentioned above
  • Select Run As -> Java Application for desktop projects. In the upcoming dialog select LwjglTestStarter
  • Select Run As -> Android Application for the android project. This will either start the emulator or deploy the test project to a connected Android device
  • Select Run As -> Web Application for the html5 project. You might be asked for a WAR directory. Use the gdx-tests-gwt/war. A new view opens up, click the URL that's presented to you. You might get prompted to install the GWT plugin for your browser of choice (hint: use Chrome). Note that the app runs in development mode, which means it will be terribly slow. For full speed you have to compile the HTML project, then deploy it to a web server.
  • Select Run As -> iOS Simulator|Device App for the iOS RoboVM project.

For a more in-depth description of the project setup as well as how to run and debug a libgdx project see Project Setup Gradle and follow the links for your preferred IDE.

Creating New Tests

To add a test:

  • Add a class to gdx-tests/src/com/badlogic/gdx/tests/, it should extend GdxTest
  • Add any assets you need to gdx-tests-android/assets/data. Ideally you want to reuse assets already in there
  • Add your class to gdx-tests/src/com/badlogic/gdx/tests/utils/GdxTests#tests, it's a long list of Class instances. Try to keep it in alphabetical order! This will automatically add your test to the desktop and Android test runners (E.g. LwjglTestStarter)
  • INCLUDE FOR GWT: Add your test to GwtTestWrapper, through creating an Instancer. Your test needs to specify that it needs GL20 for it to work with the GWT test harness.
  • EXCLUDE FROM GWT: Add a line to GdxTests.gwt.xml excluding your test and giving a short explanation for why it has been excluded in an xml comment.

Running Unit Tests

There are some unit tests (junit) in gdx/test directory. To run these, use command:

cd gdx
mvn test

You must have Maven installed.

Start Running Tests

LibGDX comes with a ton of small test examples. To run and easily analyze these, you need to work directly from the libGDX source. Running the tests is currently limited to Eclipse, so make sure you have Eclipse setup properly. In addition to this, you will also need

Posted on 01-11-2016 

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