1 files changed, 46 insertions, 0 deletions
diff --git a/plugin/pkg/cidr/cidr_test.go b/plugin/pkg/cidr/cidr_test.go
new file mode 100644
index 000000000..86ea28bee
--- /dev/null
+++ b/plugin/pkg/cidr/cidr_test.go
@@ -0,0 +1,46 @@
+package cidr
+
+import (
+	"net"
+	"testing"
+)
+
+var tests = []struct {
+	in       string
+	expected []string
+	zones    []string
+}{
+	{"10.0.0.0/15", []string{"10.0.0.0/16", "10.1.0.0/16"}, []string{"0.10.in-addr.arpa.", "1.10.in-addr.arpa."}},
+	{"10.0.0.0/16", []string{"10.0.0.0/16"}, []string{"0.10.in-addr.arpa."}},
+	{"192.168.1.1/23", []string{"192.168.0.0/24", "192.168.1.0/24"}, []string{"0.168.192.in-addr.arpa.", "1.168.192.in-addr.arpa."}},
+	{"10.129.60.0/22", []string{"10.129.60.0/24", "10.129.61.0/24", "10.129.62.0/24", "10.129.63.0/24"}, []string{"60.129.10.in-addr.arpa.", "61.129.10.in-addr.arpa.", "62.129.10.in-addr.arpa.", "63.129.10.in-addr.arpa."}},
+}
+
+func TestClass(t *testing.T) {
+	for i, tc := range tests {
+		_, n, _ := net.ParseCIDR(tc.in)
+		nets := Class(n)
+		if len(nets) != len(tc.expected) {
+			t.Errorf("Test %d, expected %d subnets, got %d", i, len(tc.expected), len(nets))
+			continue
+		}
+		for j := range nets {
+			if nets[j] != tc.expected[j] {
+				t.Errorf("Test %d, expected %s, got %s", i, tc.expected[j], nets[j])
+			}
+		}
+	}
+}
+
+func TestReverse(t *testing.T) {
+	for i, tc := range tests {
+		_, n, _ := net.ParseCIDR(tc.in)
+		nets := Class(n)
+		reverse := Reverse(nets)
+		for j := range reverse {
+			if reverse[j] != tc.zones[j] {
+				t.Errorf("Test %d, expected %s, got %s", i, tc.zones[j], reverse[j])
+			}
+		}
+	}
+}