Struct statsFakeBackend

internal/vector/stats_test.go:17–24

statsFakeBackend implements Backend for CollectStats tests. It is separate from the generations_test.go fakeBackend because those tests stub different methods and we want independent control. Methods not exercised here return errors so any misuse surfaces loudly.

// stub different methods and we want independent control. Methods not
// exercised here return errors so any misuse surfaces loudly.
type statsFakeBackend struct {
	active     *Generation
	activeErr  error
	building   *Generation
	buildErr   error
	statsByGen map[GenerationID]Stats
	statsErr   map[GenerationID]error
}

func (f *statsFakeBackend) ActiveGeneration(context.Context) (Generation, error) {
	if f.activeErr != nil {