Test Custom Checks with JUnit

Hello guys,

In my bachelor-thesis write some custom checks to check if a class can be
just known/used  by it’s interface (Objects have to be created with a
factory) and is using composition instead of inheritance (see Java Objects
by Interfaces http://www-home.fh-konstanz.de/~haase/joi/joi.pdf). 
Now I want to test them with JUnit and integrate them in your sourcecode to
be able to contribute the checks.

So I started an eclipse java project, where I integrate your source code and
add a package (to make it simple I named them in your style)
com.puppycrawl.tools.checkstyle.checks.joi  to the checkstyle src folder
containing my custom checks.
In the test src folder I add a package with the same containing the
testcases, and the same for the testinput folder.

Now finally comes my problem: When I want to run the ant file build.xml I
always get this error message:
compile.tests:
   [depend] Deleted 1 out of date files in 0 seconds
    [javac] Compiling 1 source file to
E:\workspace\checkstyle-v5\target\tests
    [javac]
E:\workspace\checkstyle-v5\src\tests\com\puppycrawl\tools\checkstyle\checks\joi\JOICreationalPatternCheckTest.java:15:
cannot find symbol
    [javac] symbol  : class JOICreationalPatternCheck
    [javac] location: class
com.puppycrawl.tools.checkstyle.checks.joi.JOICreationalPatternCheckTest
    [javac]            createCheckConfig(JOICreationalPatternCheck.class);
    [javac]                              ^
    [javac] 1 error

BUILD FAILED

When I delete my Testscases the build process and tests succeeds.
My test case (snipped) locks like this:

package com.puppycrawl.tools.checkstyle.checks.joi;

import java.io.File;

import org.junit.Test;

import com.puppycrawl.tools.checkstyle.BaseCheckTestSupport;
import com.puppycrawl.tools.checkstyle.DefaultConfiguration;

public class JOICreationalPatternCheckTest extends BaseCheckTestSupport
{
    @Test
    public void testPrivateConstructor() throws Exception {
        DefaultConfiguration checkConfig =
           createCheckConfig(JOICreationalPatternCheck.class);

        String[] expected = {
        	"2:component constructor private"
        };

        verify(checkConfig, getPath("joi" + File.separator +
"Komponente.java"), expected);
    }
}

Can you help me? 
Do I have to do some more configuration? 
I already added my Checks to checkstyle_check.xml and the package to the
checkstyle_package.xml.
Thank you very much!
Best regards
Jonas Middendorf (Germany)

-Update---

I have treid a little bit more. When write
DefaultConfiguration checkConfig = new DefaultConfiguration
("JOICreationalPatternCheck"); 
everythink works fine and also when I write
DefaultConfiguration checkConfig
createCheckConfig(Class.forName("JOICreationalPatternCheck");
it works to.
But I still would like to to it the same way you do.

-- 
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