http request mocking code samples

interface_approach.go

type HTTPClient interface {
   Do(req *http.Request) (*http.Response, error)
}
 
var (
   Client HTTPClient
)
 
func init() {
   Client = &http.Client{}
}
 
func GetFixedValue(baseURL string) (string, error) {
   url := fmt.Sprintf("%s/fixedvalue", baseURL)
 
   request, _ := http.NewRequest(http.MethodGet, url, nil)
   request.Header.Add("Accept", "application/json")
 
   // we have removed the line that says `client := &http.Client{}`
   response, err := Client.Do(request)
   // ...
}