rename test case

Makefile

@@ -140,7 +140,7 @@ test/example:
 	${CELL} -d -t riscv tests/examples/return.cell && ckb-debugger --bin return
 	${CELL} -d -t riscv tests/examples/named-ret-type.cell && ckb-debugger --bin named-ret-type | grep "0"
 	${CELL} -d -t riscv tests/examples/func.cell && ckb-debugger --bin func | grep "999"
-	${CELL} -d -t riscv tests/examples/interface.cell && ckb-debugger --bin interface | grep "0"
+	${CELL} -d -t riscv tests/examples/method.cell && ckb-debugger --bin method | grep "100"
 	${CELL} -t riscv tests/examples/cell-data.cell && ckb-debugger --bin cell-data
 	${CELL} -t riscv tests/examples/inputs.cell && ckb-debugger --bin inputs
 	${CELL} -t riscv tests/examples/outputs.cell && ckb-debugger --bin outputs

tests/examples/method.cell

@@ -0,0 +1,21 @@
+import (
+	"errors"
+	"debug"
+)
+
+type Buffer table {
+	start uint64
+	end uint64
+}
+func (b *Buffer) Start() (n uint64, err error) {
+	return b.start, errors.None()
+}
+func main() {
+	b := Buffer {
+		start: 100
+		end: 200
+	}
+	n, _ := b.Start()
+	debug.Printf("%d", n)
+	return 0
+}