### Question:
FlowedMessageUtils { static boolean isDelSp(String contentType) { if (isFormatFlowed(contentType)) { String delSpParameter = getHeaderParameter(contentType, HEADER_PARAM_DELSP); return HEADER_DELSP_YES.equalsIgnoreCase(delSpParameter); } return false; }    }### Answer:
@Test public void isDelSp_withFormatFlowed_shouldReturnTrue() throws Exception { assertTrue(isDelSp("text/plain; format=flowed; delsp=yes")); }
@Test public void isDelSp_withTextPlainFormatFlowed_shoulReturnFalse() throws Exception { assertFalse(isDelSp("text/plain; format=flowed")); }
@Test public void isDelSp_withoutFormatFlowed_shouldReturnFalse() throws Exception { assertFalse(isDelSp("text/plain; delsp=yes")); }
@Test public void idDelSp_withTextHtmlFormatFlowed_shouldReturnFalse() throws Exception { assertFalse(isDelSp("text/html; format=flowed; delsp=yes")); }