package util import ( "net" "testing" ) func parseCIDR(n string) *net.IPNet { _, parsedNet, _ := net.ParseCIDR(n) return parsedNet } func TestFirstIPInSubnet(t *testing.T) { tests := []struct { name string args *net.IPNet want net.IP wantErr bool }{ {"class b", parseCIDR("192.168.0.0/16"), net.ParseIP("192.168.0.1"), false}, {"class c", parseCIDR("192.168.1.0/24"), net.ParseIP("192.168.1.1"), false}, {"cidr /23", parseCIDR("192.168.0.0/23"), net.ParseIP("192.168.0.1"), false}, {"cidr /25", parseCIDR("192.168.1.0/25"), net.ParseIP("192.168.1.1"), false}, {"cidr /26", parseCIDR("172.16.1.128/26"), net.ParseIP("172.16.1.129"), false}, {"class a", parseCIDR("10.0.0.0/8"), net.ParseIP("10.0.0.1"), false}, {"cidr /32", parseCIDR("192.168.255.4/32"), net.ParseIP("192.168.255.4"), false}, {"cidr /31", parseCIDR("192.168.255.4/31"), net.ParseIP("192.168.255.5"), false}, } for _, tt := range tests { test := tt t.Run(test.name, func(t *testing.T) { got, err := FirstIPInSubnet(test.args) if (err != nil) != test.wantErr { t.Errorf("FirstIPInSubnet() error = %v, wantErr %v", err, test.wantErr) return } if !got.Equal(test.want) { t.Errorf("FirstIPInSubnet() got = %v, want %v", got, test.want) } }) } } func TestLastIPInSubnet(t *testing.T) { tests := []struct { name string args *net.IPNet want net.IP wantErr bool }{ {"class b", parseCIDR("192.168.0.0/16"), net.ParseIP("192.168.255.255"), false}, {"class c", parseCIDR("192.168.1.0/24"), net.ParseIP("192.168.1.255"), false}, {"cidr /23", parseCIDR("192.168.0.0/23"), net.ParseIP("192.168.1.255"), false}, {"cidr /25", parseCIDR("192.168.1.0/25"), net.ParseIP("192.168.1.127"), false}, {"cidr /26", parseCIDR("172.16.1.128/26"), net.ParseIP("172.16.1.191"), false}, {"class a", parseCIDR("10.0.0.0/8"), net.ParseIP("10.255.255.255"), false}, {"cidr /32", parseCIDR("192.168.255.4/32"), net.ParseIP("192.168.255.4"), false}, {"cidr /31", parseCIDR("192.168.255.4/31"), net.ParseIP("192.168.255.5"), false}, } for _, tt := range tests { test := tt t.Run(test.name, func(t *testing.T) { got, err := LastIPInSubnet(test.args) if (err != nil) != test.wantErr { t.Errorf("LastIPInSubnet() error = %v, wantErr %v", err, test.wantErr) return } if !got.Equal(test.want) { t.Errorf("LastIPInSubnet() got = %v, want %v", got, test.want) } }) } }