NoClassDefFoundError: org/apache/nifi/registry/VariableRegistry while running nifi test cases

Question

I am pretty much new to apache nifi. Couple of days back I stuck at this problem (which involves miss behaving custom nifi processor). Debugging wasnt helping me well. So I decided to explore nifi mock framework (which I should be doing already, but didnt do it :) as suggested in comments on that question.

I am taking help from these links: 1 , 2

What I was trying to do is to send single flow file to custom processor. For that I saved/serialized actual flow file using MergeContent (with FlowFile v3 version) and PutFile processor as suggested here . Now I am trying to re-read this file through code in my test using GetFile processor as follows:

import static org.junit.Assert.*;

import java.util.List;

import org.junit.Test;

import org.apache.nifi.util.TestRunners;
import org.apache.nifi.processors.standard.GetFile;
import org.apache.nifi.util.MockFlowFile;
import org.apache.nifi.util.TestRunner;

public class MyCustomProcessorTest {

    @Test
    public void testOnTrigger() {
        TestRunner runner = TestRunners.newTestRunner(new GetFile());
        runner.setProperty(GetFile.DIRECTORY, "C:\\Mahesh\\delete\\serialized-flow-files");
        runner.setProperty(GetFile.KEEP_SOURCE_FILE, "true");
        runner.run(1);

        List<MockFlowFile> results = runner.getFlowFilesForRelationship(GetFile.REL_SUCCESS);
        System.out.println("done");
    }
}

This is giving me following error:

Which maven dependency should I include to get this class? Also is my approach fine or there is any more preferable approach?

Answer 1

I would double-check if org.apache.nifi:nifi-api: is in the classpath.

If using maven I would run "mvn dependency:tree" to check.