Add tests for FieldLevel Name functions

validator_test.go

@@ -7013,3 +7013,69 @@ func TestMapStructNamespace(t *testing.T) {
 	Equal(t, len(ve), 1)
 	AssertError(t, errs, "children[1].name", "Children[1].Name", "name", "Name", "required")
 }
+
+func TestFieldLevelName(t *testing.T) {
+	type Test struct {
+		String string            `validate:"custom1"      json:"json1"`
+		Array  []string          `validate:"dive,custom2" json:"json2"`
+		Map    map[string]string `validate:"dive,custom3" json:"json3"`
+		Array2 []string          `validate:"custom4"      json:"json4"`
+		Map2   map[string]string `validate:"custom5"      json:"json5"`
+	}
+
+	var res1, res2, res3, res4, res5, alt1, alt2, alt3, alt4, alt5 string
+	validate := New()
+	validate.RegisterTagNameFunc(func(fld reflect.StructField) string {
+		name := strings.SplitN(fld.Tag.Get("json"), ",", 2)[0]
+
+		if name == "-" {
+			return ""
+		}
+
+		return name
+	})
+	validate.RegisterValidation("custom1", func(fl FieldLevel) bool {
+		res1 = fl.FieldName()
+		alt1 = fl.StructFieldName()
+		return true
+	})
+	validate.RegisterValidation("custom2", func(fl FieldLevel) bool {
+		res2 = fl.FieldName()
+		alt2 = fl.StructFieldName()
+		return true
+	})
+	validate.RegisterValidation("custom3", func(fl FieldLevel) bool {
+		res3 = fl.FieldName()
+		alt3 = fl.StructFieldName()
+		return true
+	})
+	validate.RegisterValidation("custom4", func(fl FieldLevel) bool {
+		res4 = fl.FieldName()
+		alt4 = fl.StructFieldName()
+		return true
+	})
+	validate.RegisterValidation("custom5", func(fl FieldLevel) bool {
+		res5 = fl.FieldName()
+		alt5 = fl.StructFieldName()
+		return true
+	})
+
+	test := Test{
+		String: "test",
+		Array:  []string{"1"},
+		Map:    map[string]string{"test": "test"},
+	}
+
+	errs := validate.Struct(test)
+	Equal(t, errs, nil)
+	Equal(t, res1, "json1")
+	Equal(t, alt1, "String")
+	Equal(t, res2, "json2[0]")
+	Equal(t, alt2, "Array[0]")
+	Equal(t, res3, "json3[test]")
+	Equal(t, alt3, "Map[test]")
+	Equal(t, res4, "json4")
+	Equal(t, alt4, "Array2")
+	Equal(t, res5, "json5")
+	Equal(t, alt5, "Map2")
+}