package v1 import ( "fmt" "testing" "github.com/stretchr/testify/assert" ) type wrappedLogger struct { lastMessage string } func (w *wrappedLogger) Debugf(msg string, v ...interface{}) { w.lastMessage = fmt.Sprintf(msg, v...) } func TestDebugLoggerAdapter_Printf(t *testing.T) { wrapped := &wrappedLogger{} logger := DebugLoggerAdapter(wrapped) logger.Printf("Test message #%d", 1) assert.Equal(t, "Test message #1", wrapped.lastMessage) }