Go DI Example

temp.go

// Target interface
type Repository interface {
  Add (uuid.UUID) (Account, error)
}

// This is our test structure. It has an internal function that you can inject.
type funcAccountRepo struct {
	add  func(uuid.UUID) (Account, error)
}

// This is the implementation in our test struct that just calls what we inject. It satisfies the interface but it just calls
// whatever we passed in.
func (f funcAccountRepo) Add(ssoUuid uuid.UUID) (Account, error) {
	return f.add(ssoUuid)
}

// Imagine this is inside your test now.

// This is an example of us creating the test struct and injecting a func that returns an empty account when calling
// repo.Add()
repo := funcAccountRepo{
	add:  func(uuid.UUID) (Account, error) { return Account{}, nil },
}

subject := NewAccountCreate(repo) // Pass the mocked repo in

// Now your use case/whatever has a repo as far as it is concerned but it does whatever you specified above in the
// function.