Thanks for your help Chris Introduced *dependency injection* in this code using Delegation Design pattern with the help of interface.
Here's the details explanation https://stackoverflow.com/a/59704965/5133838 Please share yours feedback. On Sat, 11 Jan, 2020, 9:39 PM Chris Burkert, <burkert.ch...@gmail.com> wrote: > You could inject your dependencies. There is a funny talk by Liron Levin > [1] which helped me a lot. > > 1: https://youtu.be/_B_vCEiO4mA > > prakash sharma <prakashsharmac...@gmail.com> schrieb am Sa. 11. Jan. 2020 > um 16:24: > >> Need help: >> >> https://stackoverflow.com/questions/59693971/mocked-method-not-working-in-golang-while-running-the-test-cases >> >> I am trying to mock an struct method in test cases but it is not working. >> I want to mock *Validate* method here: >> >> package main >> >> import ( >> "fmt" >> ) >> >> type DemoInterface interface { >> Inc(int) (int, error) >> Validate(int) error >> } >> type DemoStruct struct{} >> >> func (l DemoStruct) Inc(num int) (int, error) { >> err := l.Validate(num) >> if err != nil { >> return 0, err >> } >> num = num + 100 >> return num, nil >> >> } >> func (l DemoStruct) Validate(num int) error {// SOME DB LOGIC IS HERE WHICH >> I CAN NOT POST at Stackoverflow >> if num > 100 { >> return fmt.Errorf("INVALID NUM %v", num) >> } >> return nil >> } >> >> func main() { >> s, err := DemoStruct{}.Inc(10) >> if err != nil { >> fmt.Println(err) >> } >> fmt.Println(s) >> >> } >> >> >> >> My test cases: >> >> package main >> >> import ( >> "fmt" >> "testing" >> ) >> >> const ( >> SUCCESS = "SUCCESS" >> ERROR = "ERROR" >> ) >> >> type MockDemoStruct struct { >> DemoStruct >> functionality string >> } >> >> func (m MockDemoStruct) Validate(num int) error { >> switch m.functionality { >> case SUCCESS: >> return nil >> case ERROR: >> fmt.Errorf("MOCK ERROR %v", num) >> >> } >> return fmt.Errorf("MOCK ERROR %v", num) >> } >> >> func TestPath(t *testing.T) { >> >> t.Run("ERROR", func(t *testing.T) { >> ls := MockDemoStruct{DemoStruct{}, SUCCESS} >> res, err := ls.Inc(110) >> expected := fmt.Errorf("MOCK ERROR %v", 10) >> if err != expected { >> t.Errorf("NOT MATCH %v %v", err, expected) >> //-----------------NOT MATCH INVALID NUM 110 MOCK ERROR 10 >> ERROR----------------------------- >> >> } >> fmt.Println(res) >> }) >> } >> >> >> >> -- >> You received this message because you are subscribed to the Google Groups >> "golang-nuts" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to golang-nuts+unsubscr...@googlegroups.com. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/golang-nuts/a90f9eee-cebb-4d2d-b1cf-76b16faee296%40googlegroups.com >> <https://groups.google.com/d/msgid/golang-nuts/a90f9eee-cebb-4d2d-b1cf-76b16faee296%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> > -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/golang-nuts/CALLXM4BEdxBsud33TMekjK8o9Zt7mDjvrS0N3wWjaRFsS%3DOysw%40mail.gmail.com.
