assertEquals(6, request.getMessages().size());
        assertEquals("Q2", request.getMessages().get(0).getContent());
    }

    @Test
    public void test_addIntentHistory_contiguousBlock() {
        client.setTestIntentHistoryMaxChars(10);
        // Messages: [big(20), small(2), small(2)]
        // From newest: small(2) fits (remaining=8), small(2) fits (remaining=6), big(20) doesn't => break