added go:generate example

README.md

@@ -77,6 +77,23 @@ func CompleteSignUp(to string, sender EmailSender) {
 
 The mocked structure implements the interface, where each method calls the associated function field.
 
+### Using go generate
+
+At the top of the file containing the interface you wish to mock, you can use
+`go generate` to specify the interface to mock:
+
+```
+package test
+
+//go:generate moq -out myface_test.go . MyFace
+
+type MyFace interface {
+	Method() string
+}
+```
+
+Then navigate to the directory in a shell, and run `go generate`.
+
 ## Tips
 
 * Keep mocked logic inside the test that is using it

generate/generate.go

@@ -1,5 +1,8 @@
 package generate
 
+// In a terminal, run `go generate` in this directory to have
+// it generates the generated.go file.
+
 //go:generate moq -out generated.go . MyInterface
 
 type MyInterface interface {