Mock function not found in EasyMock

I am trying to build my first EasyMock test, however I have a trivial problem that the function "mock" is not found.

Here is my pretty straightforward code:

package homework;

import org.easymock.EasyMockSupport;
import org.junit.Before;
import org.junit.Test;

import com.locusenergy.homework.Elevator;

public class ElevatorTest extends EasyMockSupport{

    private Elevator elevator;

    @Before 
      public void setUp() {
        elevator = mock(Elevator.class);

      } 

    @Test
    public void testCallElevator() {
        elevator.requestFloor(5);
    }
}

However, I am getting an error that mock is not found. I have no idea how to fix this issue.