Instrumented (by cobertura) @Decorator bean cannot be tested by OpenEJB for unit testing

Question

To get a code coverage report, I use the @Decorator bean plugin cobertura maven. When running my unit test in an OpenEJB container. The container reports some error during startup (new initial context).

Invokes: org.apache.webbeans.exception.WebBeansConfigurationException: Decorator: MyDecorator, Name: null, WebBeans Type: DECORATOR, API Types: [org.apache.commo ns.configuration.Configuration, net.sourceforge.cobertura.coveragedata.HasBeenmentment org.apache.commons.configuration.AbstractConfiguration, MyDecorator, org.apache.commons.configuration.event.EventSource, java.lang.Object], Qualifiers: [javax.enterprise.inject.Any, javax.enterprise.inject.Default] The delegate must implement all decorated decorated types, but the interface of the decorator type net.sourceforge.cobertura.coveragedata.HasBeenInstrumented cannot be assigned to the delegate ate interface type org.apache.commons.configuration.Configuration

Details:

I have one Decorator for testing a device. Sort of

import org.apache.commons.configuration.AbstractConfiguration;

import org.apache.commons.configuration.Configuration;

@Decorator

public class MyDecorator extends AbstractConfiguration {

@Inject @Delegate private Configuration conf; 

.....

}

After cobertura measured it, the code is as follows: (I destroy it)

import net.sourceforge.cobertura.coveragedata.HasBeenInstrumented;

@Decorator

public class MyDecorator extends AbstractConfiguration implements HasBeenInstrumented {

 @Inject @Delegate private Configuration conf; 

.....

}

As you can see, cobertura adds another interface to my decorator. When OpenEJB loads and deploys this tool class, an error is reported:

Invokes: org.apache.webbeans.exception.WebBeansConfigurationException: Decorator: MyDecorator, Name: null, WebBeans Type: DECORATOR, API Types: [org.apache.commo ns.configuration.Configuration, net.sourceforge.cobertura.coveragedata.HasBeenmentment org.apache.commons.configuration.AbstractConfiguration, MyDecorator, org.apache.commons.configuration.event.EventSource, java.lang.Object], Qualifiers: [javax.enterprise.inject.Any, javax.enterprise.inject.Default] The delegate must implement all decorated decorated types, but the interface of the decorator type net.sourceforge.cobertura.coveragedata.HasBeenInstrumented cannot be assigned to the delegate ate interface type org.apache.commons.configuration.Configuration

The error log says that @Decorator and @Delegate should implement the same types. But after the tool, the tested class has another interface.

Then I try to use org.apache.commons.configuration.AbstractConfiguration and org.apache.commons.configuration.Configuration. (using the commons-configuration-1.9.jar tool with cobertura) And change my code as:

@Decorator

public class MyDecorator extends AbstractConfiguration {

 @Inject @Delegate private AbstractConfiguration conf; 

.....

} // I use AbstractConfiguration instead of Configuration because Configuration is an // interface that cannot be instrumental.

After that, the problem is resolved. But this is not a good way to do this.

The main reason is the maven cobertura plugin, which identifies the class file by adding an interface to the source class, I work for most cases. But not for the @Decorator bean that runs in the container.

Should I post comments for maven-cobertura-plugin org?

Does anyone have a suggestion on how unit test @ Decorators.And can easily get a coverage report? Maybe my unit test is not implemented in a good way, maybe openejb is not suitable for this?

Usually, how do you unit test your @Decorators?

Answer 1

Cobertura does not support interfaces. It is recommended that classes without tools go along the class path after tool classes for this reason.

Therefore, when you install the instrument, first compile maven, then put yourself in a directory where the source code of the classes you want to use is, and then run the following command: mvn cobertura: instrument.

This will make the cobertura tool all classes, and maven will automatically add files that are not used. the tool code will be in ". \ target \ generated-classes \ cobertura".

You will need to run jar -cvf [name-of-jar] .jar * ', then you will get your instrumental jar.