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Implementing Domain-Specific Languages with Xtext and Xtend

You're reading from   Implementing Domain-Specific Languages with Xtext and Xtend Learn how to implement a DSL with Xtext and Xtend using easy-to-understand examples and best practices.

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Product type Paperback
Published in Aug 2016
Publisher Packt
ISBN-13 9781786464965
Length 426 pages
Edition 2nd Edition
Languages
Tools
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Author (1):
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Lorenzo Bettini Lorenzo Bettini
Author Profile Icon Lorenzo Bettini
Lorenzo Bettini
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Toc

Table of Contents (18) Chapters Close

Preface Preface to the second edition
1. Implementing a DSL FREE CHAPTER 2. Creating Your First Xtext Language 3. Working with the Xtend Programming Language 4. Validation 5. Code Generation 6. Customizing Xtext Components 7. Testing 8. An Expression Language 9. Type Checking 10. Scoping 11. Continuous Integration 12. Xbase 13. Advanced Topics 14. Conclusions
A. Bibliography
Index

Testing the UI

Most of the mechanisms of a DSL implemented in Xtext can be tested with plain Java JUnit tests without a UI environment. However, when testing UI features, tests need a running Eclipse.

Eclipse provides a specific launch configuration, "JUnit Plug-in Test", which executes JUnit tests with a running Eclipse.

Implementing tests for the UI concepts might be tricky, since usually you will need to write code to set up Eclipse workbench infrastructures such as projects, files, and so on. Xtext provides some base classes for testing UI concepts, which do most of the job for you so that you can simply test specific features without having to worry about the setup steps.

All the UI tests we implement in this section are created in the project org.example.entities.ui.tests.

Note

The examples in this section do not necessarily represent valuable tests; they should be seen as starting points for more complex tests of more complex DSLs.

Testing the content assist

In the Entities DSL...

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