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Scoping in Xtext [message #1160369]

Tue, 29 October 2013 00:58

Eclipse User

Hello all,
I have a xtend class Sample.xtend and I have injected scope provider in it,
something like:

@Inject
private IScopeProvider scopeProvider

I am using:
val scope = scopeProvider.getScope(ref, getReferenceFeature(ref))

"ref" is an EObject and "getReferenceFeature(ref)" method is defined by me to find EReference.

When I run the tool this thing works perfectly fine BUT, when I call this method in my JUNIT test case, I GET A NULL POINTER EXCEPTION at val scope = scopeProvider.getScope(ref, getReferenceFeature(ref))
.

All the data needed for test case is present but I get exception at that place. Do I have to do any initialization or some other stuff related to Scoping before I can use it in my test case ??

Thanks in advance Smile

Re: Scoping in Xtext [message #1160462 is a reply to message #1160369]

Tue, 29 October 2013 02:24

Eclipse User

Hi all,
Some more info.
Basically here my scopeProvider is null, so how do I avoid it when running test cases. It works fine when I run the tool.

Thanks in advance Smile

Re: Scoping in Xtext [message #1160495 is a reply to message #1160462]

Tue, 29 October 2013 02:54

Eclipse User

hi,

are you sure your test setup is correct?

@RunWith(XtextRunner.class)
@InjectWith(MyDslInjectorProvider.class)
public class SampleTest {

}

Re: Scoping in Xtext [message #1160557 is a reply to message #1160495]

Tue, 29 October 2013 03:48

Eclipse User

Hi Christian,
Thanks for your reply.
Yes, the set up is correct, the only difference is I am using XtextRunner3.

But, I have one Scoping class written by myself i.e. SomeScopeProvider.java and when I inject using:
@Inject
private IScopeProvider scopeProvider;

At runtime (i.e. when I launch my tool) this scopeProvider is of type SomeScopeProvider. But when I run the test cases it is null.

Any help??

Thanks in advance Smile

Re: Scoping in Xtext [message #1160575 is a reply to message #1160557]

Tue, 29 October 2013 04:05

Eclipse User

Hi,

does it work if you directly inject YourdslScopeProvider?

Re: Scoping in Xtext [message #1160582 is a reply to message #1160575]

Tue, 29 October 2013 04:06

Eclipse User

P.S: what is XtextRunner3???

Re: Scoping in Xtext [message #1160605 is a reply to message #1160582]

Tue, 29 October 2013 04:27

Eclipse User

Hi,
XtextRunner3 extends BlockJUnit4ClassRunner. Same as XtextRunner. Anyways I have changed it to XtextRunner Still the same problem. I will write the code snippet below:

Class Sample {
@Inject
private IScopeProvider scopeProvider;

public void someMethod(){
.......
......
......
scopeProvider.getScope(......); // scopeProvider is NULL here when I call this method in JUNIT but it works fine when i launch my tool.
}

}
---------------------------------------------------------------------------------------

My JUNIT class is:
@InjectWith(value = MyDslInjectorProvider.class)
@RunWith(value = XtextRunner.class)
public class ModelTest {
public void testsomeMethod(){
Here calling someMethod()
}
}
---------------------------------------------------------------------------------------

I have defined one CUSTOM Scope provider class SomeScopeProvider.java and scopeProvider is of type SomeScopeProvider at runtime and NULL while executing tests.

Here I have given complete description. Please ignore earlier messages.

Thanks in advance Smile

Re: Scoping in Xtext [message #1160608 is a reply to message #1160605]

Tue, 29 October 2013 04:29

Eclipse User

Sorry have no idea on that .
Can you retry that with a new Xtext project?

--
Need training, onsite consulting or any other kind of help for Xtext?
Go visit http://xtext.itemis.com or send a mail to xtext at itemis dot de

Re: Scoping in Xtext [message #1160620 is a reply to message #1160608]

Tue, 29 October 2013 04:36

Eclipse User

Hi Christian,
But if I write a setter method for scopeProvider in Sample class and call this before the test case is executed it works fine.
I just wanted to know is it a good practice to do that???

Thanks Smile

Re: Scoping in Xtext [message #1160621 is a reply to message #1160620]

Tue, 29 October 2013 04:38

Eclipse User

Hi,

it should work with @Inject and in my project it works with > 1000 Tests

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