add example cases for package gerror

errors/gerror/gerror_z_example_test.go

@@ -0,0 +1,55 @@
+// Copyright GoFrame Author(https://github.com/gogf/gf). 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 gerror_test
+
+import (
+	"errors"
+	"fmt"
+	"github.com/gogf/gf/errors/gerror"
+)
+
+func ExampleNewCode() {
+	err := gerror.NewCode(10000, "My Error")
+	fmt.Println(err.Error())
+	fmt.Println(gerror.Code(err))
+
+	// Output:
+	// My Error
+	// 10000
+}
+
+func ExampleNewCodef() {
+	err := gerror.NewCodef(10000, "It's %s", "My Error")
+	fmt.Println(err.Error())
+	fmt.Println(gerror.Code(err))
+
+	// Output:
+	// It's My Error
+	// 10000
+}
+
+func ExampleWrapCode() {
+	err1 := errors.New("permission denied")
+	err2 := gerror.WrapCode(10000, err1, "Custom Error")
+	fmt.Println(err2.Error())
+	fmt.Println(gerror.Code(err2))
+
+	// Output:
+	// Custom Error: permission denied
+	// 10000
+}
+
+func ExampleWrapCodef() {
+	err1 := errors.New("permission denied")
+	err2 := gerror.WrapCodef(10000, err1, "It's %s", "Custom Error")
+	fmt.Println(err2.Error())
+	fmt.Println(gerror.Code(err2))
+
+	// Output:
+	// It's Custom Error: permission denied
+	// 10000
+}