assertEquals(Long.valueOf(173), longConverter.convert("173"));
assertEquals(Long.valueOf(173), longConverter.convert(" 173 "));
assertEquals(Long.valueOf(-1), longConverter.convert(" -1 "));
assertEquals(Long.valueOf(1), longConverter.convert(" +1 "));
assertEquals(Long.valueOf(9223372036854775807L), longConverter.convert(" +9223372036854775807 "));
assertEquals(Long.valueOf(-9223372036854775808L), longConverter.convert(" -9223372036854775808 "));
try {
longConverter.convert("9223372036854775808");
fail();