😊

Peter Götz petergtz

😊

Software Development Engineer at AWS. Quality Pirate.

petergtz / CopyFile-new-syntax.go

Last active November 13, 2018 09:59

	func CopyFile(src, dst string) fails_with error {
	r := os.Open(src) on_error err fail fmt.Errorf("in Open %s %s: %v", src, dst, err)
	defer r.Close() on_error {}

	w := os.Create(dst) on_error err fail fmt.Errorf("in Create %s %s: %v", src, dst, err)

	io.Copy(w, r) on_error err {
	w.Close() on_error {} // explicitly ignore error
	os.Remove(dst) on_error {} // explicitly ignore error
	fail fmt.Errorf("in Copy %s %s: %v", src, dst, err)

petergtz / resource_handler_stubbing_and_verification_snippet.go

Last active April 22, 2018 19:46

	// Stubbing:
	When(updater.NotifyUploadSucceeded(AnyString(), AnyString(), AnyString())).
	ThenReturn(fmt.Errorf("Some error"))

	// Exercise object under test:
	handler.AddOrReplace(responseWriter, ..., map[string]string{"identifier": "someguid"})

	// Verification:
	blobstore.VerifyWasCalledOnce().Put(EqString("someguid"), AnyReadSeeker())
	updater.VerifyWasCalled(Never()).NotifyUploadFailed(AnyString(), AnyError())

petergtz / phone-book-mock-custom-impl-example.go

Created April 22, 2018 19:13

	phoneBook := NewMockPhoneBook()

	// Stubbing:
	When(phoneBook.GetPhoneNumber(AnyString())).Then(func(params []Param) ReturnValues {
	return []ReturnValue{fmt.Sprintf("1-800-CALL-%v", strings.ToUpper(params[0]))}
	},


	// Prints "1-800-CALL-DAN":
	fmt.Println(phoneBook.GetPhoneNumber("Dan"))

petergtz / phone-book-mock-matcher-example.go

Created April 22, 2018 19:08

When(phoneBook.GetPhoneNumber(AnyString())).ThenReturn("123-456-789")

petergtz / phone-book-mock-example.go

Created April 22, 2018 19:07

	// Interface:
	type PhoneBook interface {
	GetPhoneNumber(name string) string
	}

	// Test:

	// creating the mock
	phoneBook := NewMockPhoneBook()

petergtz / resource_handler_test_snippet.go

Last active April 22, 2018 19:23

An example of how to use Pegomock's InOrderContext

	// Create mocks:
	blobstore := NewMockBlobstore()
	updater := NewMockUpdater()

	// Create object under test:
	handler := NewResourceHandlerWithUpdater(blobstore, updater, ...)
	...

	// Make request against the Bits-Service resource handler:
	handler.AddOrReplace(responseWriter, ..., map[string]string{"identifier": "someguid"})

petergtz / softlayer_snippet2.go

Created August 24, 2017 23:08

	virtualGuestService, e := softlayerClient.GetSoftLayer_Virtual_Guest_Service()

	vms, e := virtualGuestService.GetVMs()
	if e != nil {
	return cli.NewExitError(e.Error(), 1)
	}

petergtz / error_handling_example.go

Last active August 2, 2017 22:02

A simple example of a new error handling concept in Go

	func Caller(arg int) {
	result := SomeFunction(arg) on_error e {
	fmt.Printf("Wrong input: %v", e)
	return
	}
	fmt.Printf("Result: %v", result)
	}

	func SomeFunction(arg int) int fails_with error {
	if arg == 42 {

petergtz / softlayer_snippet_with_new_error_handling.go

Created July 31, 2017 21:47

Some Go code with new error handling

	virtualGuestService := softlayerClient.GetSoftLayer_Virtual_Guest_Service() or_on_error e {
	fail_with cli.NewExitError(e.Error(), 1)
	}

	server := cliContext.GlobalString("server")
	port := cliContext.GlobalInt("port")

	if server == "" {
	fail_with cli.NewExitError("server not provided as input flag", 1)
	}

petergtz / softlayer_snippet.go

Created July 31, 2017 20:41

Some Go code with a semantic error in the error handling

	virtualGuestService, e := softlayerClient.GetSoftLayer_Virtual_Guest_Service()
	if e != nil {
	return cli.NewExitError(e.Error(), 1)
	}

	server := cliContext.GlobalString("server")
	port := cliContext.GlobalInt("port")

	if server == "" {
	return cli.NewExitError(e.Error(), 1)