@Test
public void shouldCallUpdatePassword() throws IOException {

    doReturn(new FluentResponse(new TestHttpResponse(201, "created"))).when(changePasswordService).updatePassword("param1", "param2", "param3");
    changePasswordTask.doInBackground("param1", "param2", "param3");
    verify(changePasswordService).updatePassword("param1", "param2", "param3");
}