Как пройти тест

package sef.module15.activity;
 
import java.util.HashSet;
import java.util.Set;
 
public class PermissionList implements Permissable {
 
    private Set<Permission> permission;
 
    /**
     * Creates a permission object and provides an identifier for it
     * 
     * @param permissionID
     */
 
    public PermissionList(String permissionID) {
        
        for(Permission p : Permission.values()) {
        if (permissionID == null) {
            this.permission = new HashSet<Permission>();
        }
        System.out.println(p);
        }
    }
 
    public Set<Permission> getPermission() {
 
        return permission;
 
    }
 
    public void removePermission(Permission... permission) {
        this.permission.remove(permission);
 
    }
 
    public void setPermission(Permission... permission) {
        if (permission == null) {
            setPermission(permission);
        }
 
    }
 
    public boolean isPermissable(Permission permission) {
        return this.permission.contains(permission);
    }
}
 
 
 
 
package sef.module15.activity;
 
public enum Permission {
    READ,
    WRITE,
    CREATE,
    DELETE,
    EXECUTE;
}
 
 
package sef.module15.activity;
 
import junit.framework.TestCase;
 
public class PermissionsTest extends TestCase {
    
    PermissionsTest1 runTest = new PermissionsTest1();
    
    public void testPermissions(){
        runTest.testPermissions();      
    }
}
 
 
 
package sef.module15.activity;
 
import java.util.Set;
 
public interface Permissable{
 
    /**
     * Sets the permission provided the Permissions passed as parameters
     * 
     * @param permissions
     */
    public void setPermission(Permission...permissions);
    
    
    /**
     * Removes the permissions specified in the parameters
     * 
     * @param permissions
     */
    public void removePermission(Permission...permissions);
    
    
    /**
     * @return
     */
    public Set<Permission>getPermission();
    public boolean isPermissable(Permission permission);
}