add Smap comment and modify testcase

naming.go

@@ -66,6 +66,7 @@ func ToColumnName(name string) string {
 	return TheNamingStrategy.ColumnName(name)
 }
 
+// mapping cache map
 var Smap = newSafeMap()
 
 func defaultNamer(name string) string {

naming_test.go

@@ -32,11 +32,40 @@ func TestTheNamingStrategy(t *testing.T) {
 
 func TestAddNamingStrategy(t *testing.T) {
 
-	// users can set their custom namer
-	custom := &gorm.NamingStrategy{
-		Column: CustomNamer,
-	}
-	gorm.AddNamingStrategy(custom)
+	// users can set their custom namer and use `Smap` to cache result
+	gorm.AddNamingStrategy(&gorm.NamingStrategy{
+		Column: func(name string) string {
+			// set `smap` public access and users can use it to cache
+			if v := gorm.Smap.Get(name); v != "" {
+				return v
+			}
+
+			const (
+				//lower = false
+				upper = true
+			)
+
+			var (
+				value    = name
+				buf      = bytes.NewBufferString("")
+				currCase bool
+			)
+
+			for i, v := range value {
+				currCase = bool(value[i] >= 'A' && value[i] <= 'Z')
+				if i == 0 && currCase == upper {
+					buf.WriteRune(v + 32)
+				} else {
+					buf.WriteRune(v)
+				}
+			}
+
+			s := buf.String()
+			gorm.Smap.Set(name, s)
+
+			return s
+		},
+	})
 
 	// test
 	cases := []struct {
@@ -44,10 +73,6 @@ func TestAddNamingStrategy(t *testing.T) {
 		namer    gorm.Namer
 		expected string
 	}{
-		{name: "auth", expected: "auth", namer: gorm.TheNamingStrategy.DB},
-		{name: "userRestrictions", expected: "user_restrictions", namer: gorm.TheNamingStrategy.Table},
-
-		{name: "clientID", expected: "clientID", namer: gorm.TheNamingStrategy.Column},
 		{name: "Client0ID", expected: "client0ID", namer: gorm.TheNamingStrategy.Column},
 		{name: "_Client_ID_", expected: "_Client_ID_", namer: gorm.TheNamingStrategy.Column},
 	}
@@ -63,38 +88,6 @@ func TestAddNamingStrategy(t *testing.T) {
 
 }
 
-func CustomNamer(name string) string {
-	// set `smap` public access and users can use it to cache
-	if v := gorm.Smap.Get(name); v != "" {
-		return v
-	}
-
-	const (
-		lower = false
-		upper = true
-	)
-
-	var (
-		value    = name
-		buf      = bytes.NewBufferString("")
-		currCase bool
-	)
-
-	for i, v := range value {
-		currCase = bool(value[i] >= 'A' && value[i] <= 'Z')
-		if i == 0 && currCase == upper {
-			buf.WriteRune(v + 32)
-		} else {
-			buf.WriteRune(v)
-		}
-	}
-
-	s := buf.String()
-	gorm.Smap.Set(name, s)
-
-	return s
-}
-
 func TestNamingStrategy(t *testing.T) {
 
 	dbNameNS := func(name string) string {