unit testing files renaming

errors/gcode/gcode_z_unit_test.go

@@ -0,0 +1,23 @@
+// Copyright GoFrame Author(https://goframe.org). All Rights Reserved.
+//
+// This Source Code Form is subject to the terms of the MIT License.
+// If a copy of the MIT was not distributed with this file,
+// You can obtain one at https://github.com/gogf/gf.
+
+package gcode_test
+
+import (
+	"testing"
+
+	"github.com/gogf/gf/v2/errors/gcode"
+	"github.com/gogf/gf/v2/test/gtest"
+)
+
+func Test_Nil(t *testing.T) {
+	gtest.C(t, func(t *gtest.T) {
+		c := gcode.New(1, "custom error", "detailed description")
+		t.Assert(c.Code(), 1)
+		t.Assert(c.Message(), "custom error")
+		t.Assert(c.Detail(), "detailed description")
+	})
+}