Add Redis Cluster support.

crc16_test.go

@@ -0,0 +1,25 @@
+package redis
+
+import (
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+)
+
+var _ = Describe("CRC16", func() {
+
+	// http://redis.io/topics/cluster-spec#keys-distribution-model
+	It("should calculate CRC16", func() {
+		tests := []struct {
+			s string
+			n uint16
+		}{
+			{"123456789", 0x31C3},
+			{string([]byte{83, 153, 134, 118, 229, 214, 244, 75, 140, 37, 215, 215}), 21847},
+		}
+
+		for _, test := range tests {
+			Expect(crc16sum(test.s)).To(Equal(test.n), "for %s", test.s)
+		}
+	})
+
+})