I have been unable to find a solution to mocking methods from golang packages.
For example, my project has code that attempts to recover when Os.Getwd() returns an error. The easiest way I can thinking of making a unit test for this, is by mocking the Os.Getwd() method to return an error, and verify that the code works accordingly.
I tried using testify, but it does not seem to be possible.
Anyone have any experience with that?
My own solution was to take the method as an argument, which allow to inject a "mock" instead when testing. Additionnaly, create an exported method as public facade and an unexported one for testing.
Example:
func Foo() int {
return foo(os.Getpid)
}
func foo(getpid func() int) int {
return getpid()
}