remove get result from builder interface

Author: senghoo

06_builder/builder.go

@@ -5,7 +5,6 @@ type Builder interface {
 	Part1()
 	Part2()
 	Part3()
-	GetResult() string
 }
 
 type Director struct {

06_builder/builder_test.go

@@ -1,9 +1,6 @@
 package builder
 
-import (
-	"strconv"
-	"testing"
-)
+import "testing"
 
 type Builder1 struct {
 	result string
@@ -51,16 +48,16 @@ func (b *Builder2) Part3() {
 	b.result += 3
 }
 
-func (b *Builder2) GetResult() string {
-	return strconv.Itoa(b.result)
+func (b *Builder2) GetResult() int {
+	return b.result
 }
 
 func TestBuilder2(t *testing.T) {
 	builder := &Builder2{}
 	director := NewDirector(builder)
 	director.Construct()
 	res := builder.GetResult()
-	if res != "6" {
-		t.Fatalf("Builder2 fail expect 6 acture %s", res)
+	if res != 6 {
+		t.Fatalf("Builder2 fail expect 6 acture %d", res)
 	}
 }