func (f *FakeIPSet) DestroySet(set string) error {
	delete(f.Sets, set)
	delete(f.Entries, set)
	return nil
}

// DestroyAllSets is part of interface.
func (f *FakeIPSet) DestroyAllSets() error {
	f.Sets = nil
	f.Entries = nil
	return nil
}

// CreateSet is part of interface.
func (f *FakeIPSet) CreateSet(set *ipset.IPSet, ignoreExistErr bool) error {

type Interface interface {
	// FlushSet deletes all entries from a named set.
	FlushSet(set string) error
	// DestroySet deletes a named set.
	DestroySet(set string) error
	// DestroyAllSets deletes all sets.
	DestroyAllSets() error
	// CreateSet creates a new set.  It will ignore error when the set already exists if ignoreExistErr=true.
	CreateSet(set *IPSet, ignoreExistErr bool) error

		t.Errorf("Unexpected set: %v", fake.Sets[set.Name])
	}
	if fake.Entries[set.Name] != nil {
		t.Errorf("Unexpected entries: %v", fake.Entries[set.Name])
	}

	// Destroy all sets
	if err := fake.DestroyAllSets(); err != nil {
		t.Errorf("Unexpected error: %v", err)
	}
	if len(fake.Sets) != 0 {
		t.Errorf("Expected 0 sets, got %d, sets: %v", len(fake.Sets), fake.Sets)
	}
	if len(fake.Entries) != 0 {

			func(cmd string, args ...string) exec.Cmd { return fakeexec.InitFakeCmd(&fcmd, cmd, args...) },
		},
	}
	runner := New(fexec)
	// Success
	err := runner.DestroyAllSets()
	if err != nil {
		t.Errorf("expected success, got %v", err)
	}
	if fcmd.CombinedOutputCalls != 1 {
		t.Errorf("expected 1 CombinedOutput() calls, got %d", fcmd.CombinedOutputCalls)
	}