Book Image

Eclipse 4 Plug-in Development by Example : Beginner's Guide

By : Dr Alex Blewitt
Book Image

Eclipse 4 Plug-in Development by Example : Beginner's Guide

By: Dr Alex Blewitt

Overview of this book

<p>As a highly extensible platform, Eclipse is used by everyone from independent software developers to NASA. Key to this is Eclipse’s plug-in ecosystem, which allows applications to be developed in a modular architecture and extended through its use of plug-ins and features.<br /><br />"Eclipse 4 Plug-in Development by Example Beginner's Guide" takes the reader through the full journey of plug-in development, starting with an introduction to Eclipse plug-ins, continued through packaging and culminating in automated testing and deployment. The example code provides simple snippets which can be developed and extended to get you going quickly.</p> <p>This book covers basics of plug-in development, creating user interfaces with both SWT and JFace, and interacting with the user and execution of long-running tasks in the background.</p> <p>Example-based tasks such as creating and working with preferences and advanced tasks such as well as working with Eclipse’s files and resources. A specific chapter on the differences between Eclipse 3.x and Eclipse 4.x presents a detailed view of the changes needed by applications and plug-ins upgrading to the new model. Finally, the book concludes on how to package plug-ins into update sites, and build and test them automatically.</p>
Table of Contents (19 chapters)
Eclipse 4 Plug-in Development by Example Beginner's Guide
Credits
About the Author
Acknowledgement
About the Reviewers
www.PacktPub.com
Preface
Index

Time for action – getting values from the UI


Note that if the test tries to access a property from the returned widget, there may be an invalid thread-access error. For example, ctabs.get(0).getText() will result in an Invalid thread access SWT error.

To perform tests on widgets, the code has to be run in the UI thread. Either the Display.getDefault().syncExec() or the equivalent Synchronizer class can be used, but SWTBot has a general interface called StringResult, which is like a Runnable method that can return a String value through syncExec() on the bot.

  1. In the last testTimeZone() method of the UITest class, create a new StringResult and pass it to UIThreadRunnable.syncExec().

  2. In the run() method, get the first cTabItem and return its text value.

  3. After the Runnable method has been run, assert that the value is Africa.

  4. The code looks like this:

    String tabText = UIThreadRunnable.syncExec(new StringResult() {
      @Override
      public String run() {
        return ctabs.get(0).getText();
      }
    });
    assertEquals...