return ErrBatchFull
	}

	if _, ok := b.items[key]; !ok {
		b.keys = append(b.keys, key)
	}
	b.items[key] = item

	return nil
}

// GetAll fetches the items and resets the batch
// Returned items are not referenced by the batch
func (b *Batch[K, T]) GetAll() (orderedKeys []K, orderedItems []T, err error) {
	b.Lock()
	defer b.Unlock()

	orderedKeys = append([]K(nil), b.keys...)
	for _, key := range orderedKeys {

		t.Fatal("Expected batch.IsFull to be true but got false")
	}
	batchLen := batch.Len()
	if batchLen != int(limit) {
		t.Fatalf("expected batch length to be %v but got %v", limit, batchLen)
	}
	keys, items, err := batch.GetAll()
	if err != nil {
		t.Fatalf("unable to get the items from the batch; %v", err)
	}
	if len(items) != int(limit) {
		t.Fatalf("Expected length of the batch items to be %v but got %v", limit, len(items))
	}