add more tests on slave

Author: smilad

universal_test.go

@@ -70,6 +70,20 @@ var _ = Describe("UniversalClient", func() {
 			ReadOnly: true,
 		})
 		Expect(client.Ping(ctx).Err()).NotTo(HaveOccurred())
+
+
+		roleCmd := client.Do(ctx, "ROLE")
+        role, err := roleCmd.Result()
+        Expect(err).NotTo(HaveOccurred())
+
+        roleSlice, ok := role.([]interface{})
+        Expect(ok).To(BeTrue())
+        Expect(roleSlice[0]).To(Equal("slave"))
+
+
+		err := client.Set(ctx, "somekey", "somevalue", 0).Err()
+        Expect(err).To(HaveOccurred())
+
 	})