1 files changed, 62 insertions, 0 deletions
diff --git a/libpod/network/subnet_test.go b/libpod/network/subnet_test.go
index 917c3be88..55b2443bd 100644
--- a/libpod/network/subnet_test.go
+++ b/libpod/network/subnet_test.go
@@ -33,3 +33,65 @@ func TestNextSubnet(t *testing.T) {
 		})
 	}
 }
+
+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)
+			}
+		})
+	}
+}