// future.
	tests := []struct {
		name           string
		existingLabels []string
		existingTaints []v1.Taint
		newTaints      []v1.Taint
		expectedPatch  string
	}{
		{
			name:           "apply default labels",
			existingLabels: []string{""},
			existingTaints: nil,
			newTaints:      nil,

			if len(uniqueTaints[newTaint.Effect]) > 0 && uniqueTaints[newTaint.Effect].Has(newTaint.Key) {
				return nil, nil, fmt.Errorf("duplicated taints with the same key and effect: %v", newTaint)
			}
			// add taint to existingTaints for uniqueness check
			if len(uniqueTaints[newTaint.Effect]) == 0 {
				uniqueTaints[newTaint.Effect] = sets.String{}
			}
			uniqueTaints[newTaint.Effect].Insert(newTaint.Key)

			duplicatedError.Detail = "taints must be unique by key and effect pair"
			allErrors = append(allErrors, duplicatedError)
			continue
		}

		// add taint to existingTaints for uniqueness check
		if len(uniqueTaints[currTaint.Effect]) == 0 {
			uniqueTaints[currTaint.Effect] = sets.Set[string]{}
		}
		uniqueTaints[currTaint.Effect].Insert(currTaint.Key)
	}
	return allErrors