@Test
public void testConvertWithWhitespace() {

	StringToEnvelopeConverter converter= new StringToEnvelopeConverter();
	Envelope result = converter.convert(" \n  1.1,     2.2\t,\n3.3333  ,4 \n \t ");
	Assert.assertEquals(new Envelope(1.1,2.2,3.3333,4), result);
}