As part of a research idea, I’m now creating a language to write Use Cases, using Xtext. It is also a good opportunity to analyze more deeply this framework for building textual DSLs in Eclipse.
But this is not why I’m writing this post. After I wrote the language specification, I wanted to create some tests. I followed the very brief tutorial and wrote a simple test. However, It didn’t work. The failure trace in JUnit always presented an error:
org.eclipse.xtext.parser.ParseException: java.lang.IllegalStateException: Unresolved proxy http://wwww.levysiqueira.com.br/MyLanguage.ecore#//Element.Make sure the EPackage has been registered.
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