Implement list and fix test

redis.go

@@ -33,7 +33,35 @@ func (m *Redis) Close() error {
 }
 
 func (m *Redis) List(ns []string, limits ...string) ([]string, error) {
-	return nil, errors.New("not impl")
+	limits = resolveLimits(limits)
+	limits[0] = resolveNamespace(append(ns, limits[0]))
+	limits[1] = resolveNamespace(append(ns, limits[1]))
+
+	resp, err := m.client.Do("KEYS", "*")
+	if err != nil {
+		return nil, err
+	}
+
+	keys := []string{}
+	if results, ok := resp.([]interface{}); !ok {
+		return nil, ErrNotFound
+	} else {
+		for i := range results {
+			_, ok := results[i].([]uint8)
+			if !ok {
+				return nil, errors.New("not a []byte key")
+			}
+			k := fmt.Sprintf("%s", results[i])
+			if k < limits[0] {
+				continue
+			}
+			if k > limits[1] {
+				break
+			}
+			keys = append(keys, k)
+		}
+	}
+	return keys, nil
 }
 
 func (m *Redis) Get(key string, ns ...string) ([]byte, error) {