Add Additional Test With Type Hook

mapstructure_test.go

@@ -3106,6 +3106,15 @@ func TestDecoder_DecodeNil(t *testing.T) {
  },
  expectedResult: Transformed{Message: "hello world!"},
  },
+ {
+ name: "decodeNil=true for nil input with DecodeHookFuncType hook",
+ decodeNil: true,
+ input: nil,
+ decodeHook: func(reflect.Type, reflect.Type, interface{}) (interface{}, error) {
+ return Transformed{Message: "hello world!"}, nil
+ },
+ expectedResult: Transformed{Message: "hello world!"},
+ },
  {
  name: "decodeNil=true for nil input without hook",
  decodeNil: true,