// Null value should be replaced with empty list
        assertNotNull(result.get("content-type"));
        assertEquals(0, result.get("content-type").size());
    }

    @Test
    public void testGetHeaderValuesWhenHeadersNull() {
        CurlResponse response = new CurlResponse();
        // Don't set any headers

        String[] values = response.getHeaderValues("Content-Type");

        assertNotNull(values);