Made "NewMutexMap" to maintain consistency

Author: markdicksonjr

mutex.go

@@ -8,7 +8,11 @@ type MutexMap struct {
 	core     sync.Mutex
 }
 
-var MutexMapSingleton = MutexMap{}
+var MutexMapSingleton = NewMutexMap()
+
+func NewMutexMap() *MutexMap {
+	return &MutexMap{}
+}
 
 func (s *MutexMap) Lock(index string) {
 	s.core.Lock()

mutex_test.go

@@ -0,0 +1,10 @@
+package work
+
+import "testing"
+
+func TestNewMutexMap(t *testing.T) {
+	b1 := NewMutexMap()
+	if b1 == nil {
+		t.Fatal("new mutex map is nil")
+	}
+}