assertEquals("Hello, World!", message.getContent());
        assertTrue(message.isUser());
        assertFalse(message.isAssistant());
    }

    @Test
    public void test_assistantMessage() {
        final ChatMessage message = ChatMessage.assistantMessage("Hi there!");
        assertEquals(ChatMessage.ROLE_ASSISTANT, message.getRole());
        assertEquals("Hi there!", message.getContent());