@Test
public void changedEmailShouldNotBeValidIfItIsBusy() {
when(userDao.getByEmail(anyString())).thenReturn(
new JCUser("new_current_user@gmail.com", "email", "password"));
UserProfileDto editedUserProfile = new UserProfileDto();
editedUserProfile.setEmail("new_current_user@gmail.com");
when(validatorContext.buildConstraintViolationWithTemplate(null)).
thenReturn(violationBuilder);
when(violationBuilder.addNode(anyString())).
thenReturn(nodeBuilderDefinedContext);