Enforce String() inteface on Container

containers/containers.go

@@ -21,10 +21,11 @@ type Container interface {
 	Size() int
 	Clear()
 	Values() []interface{}
+	String() string
 }
 
 // GetSortedValues returns sorted container's elements with respect to the passed comparator.
-// Does not effect the ordering of elements within the container.
+// Does not affect the ordering of elements within the container.
 func GetSortedValues(container Container, comparator utils.Comparator) []interface{} {
 	values := container.Values()
 	if len(values) < 2 {

containers/containers_test.go

@@ -7,7 +7,9 @@
 package containers
 
 import (
+	"fmt"
 	"github.com/emirpasic/gods/utils"
+	"strings"
 	"testing"
 )
 
@@ -32,6 +34,16 @@ func (container ContainerTest) Values() []interface{} {
 	return container.values
 }
 
+func (container ContainerTest) String() string {
+	str := "ContainerTest\n"
+	var values []string
+	for _, value := range container.values {
+		values = append(values, fmt.Sprintf("%v", value))
+	}
+	str += strings.Join(values, ", ")
+	return str
+}
+
 func TestGetSortedValuesInts(t *testing.T) {
 	container := ContainerTest{}
 	container.values = []interface{}{5, 1, 3, 2, 4}