Junit has some limitaions , for instance we could not test the Private and Static methods
with JUNIT, this issue is addressed by some other Unit Testing APIs such EasyMock, Mockito
and all.

Here is the sample Mocktio Unit Test case.

Step 1 :
Util class which has a Static Method.

class TestUtil {
 
 public static printName (Srting name ) {
  
  System.out.println("Your Name is " + name);
 }
}

Step 2 :
 Your service that to be tested.

class YourService {
 public YourService() {
  
 }
 public void printName (Srting Name) {
  TestUtil.printName(Name);
 }
}

Step 3:
Your Test Case

import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;
import static org.powermock.api.mockito.PowerMockito.doNothing;
import static org.powermock.api.mockito.PowerMockito.whenNew;

import org.apache.tools.ant.taskdefs.Length.When;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.powermock.api.mockito.PowerMockito;
import org.powermock.core.classloader.annotations.PrepareForTest;
import org.powermock.modules.junit4.PowerMockRunner;

@RunWith(PowerMockRunner.class)
@PrepareForTest({ TestUtil.class})
public class TestBroadBandService {
 
 @Before
 public void createData() {
     PowerMockito.mockStatic(TestUtil.class);
  when (TestUtil.printName("") .thenReturn("newName");
 }

   @Test
 public void testInvokeWebService() {
  YourService YourService = new YourService();
  yourService.printName("YourName");
 }
}

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