Mock#

Generates a mock implementation for an interface (not structs) — each method becomes a <Method>Func field plus a <Method>Called counter, so you can both stub behavior and assert call counts. Enabled by default; disable with -mock=false.

gcraft generate -type Notifier -src ./notifier.go

type Notifier interface {
	Send(to, message string) error
}

Generates:

type MockNotifier struct {
	SendFunc   func(to string, message string) error
	SendCalled int
}

func (m *MockNotifier) Send(to string, message string) error {
	m.SendCalled++
	if m.SendFunc != nil {
		return m.SendFunc(to, message)
	}
	return nil
}

Usage in a test:

mock := &MockNotifier{
	SendFunc: func(to, message string) error {
		return nil
	},
}

svc.Notify(mock) // svc takes a Notifier

if mock.SendCalled != 1 {
	t.Errorf("expected Send to be called once, got %d", mock.SendCalled)
}