pkg/util/iptables missing unit tests

Added tests for Save, SaveAll, Restore and RestoreAll

pkg/util/iptables/iptables.go

@@ -54,7 +54,6 @@ type Interface interface {
 	DeleteRule(table Table, chain Chain, args ...string) error
 	// IsIpv6 returns true if this is managing ipv6 tables
 	IsIpv6() bool
-	// TODO: (BenTheElder) Unit-Test Save/SaveAll, Restore/RestoreAll
 	// Save calls `iptables-save` for table.
 	Save(table Table) ([]byte, error)
 	// SaveAll calls `iptables-save`.