improve test coverage

encode_test.go

@@ -16,6 +16,10 @@ func TestEncode(t *testing.T) {
 			"graphite message",
 			[]interface{}{map[interface{}]interface{}{"values": []interface{}{float64(473), float64(497), float64(540), float64(1497), float64(1808), float64(1890), float64(2013), float64(1821), float64(1847), float64(2176), float64(2156), float64(1250), float64(2055), float64(1570), None{}, None{}}, "start": int64(1383782400), "step": int64(86400), "end": int64(1385164800), "name": "ZZZZ.UUUUUUUU.CCCCCCCC.MMMMMMMM.XXXXXXXXX.TTT"}},
 		},
+		{
+			"small types",
+			[]interface{}{int64(0), int64(1), int64(258), int64(65537), false, true},
+		},
 	}
 
 	for _, tt := range tests {