Add support for CLUSTER ADDSLOTSRANGE (#2017)

* add cluster addslotsrange

* Add support for CLUSTER ADDSLOTSRANGE

* docstring

* fix test

* skip test

* linters

redis/client.py

@@ -710,6 +710,7 @@ class AbstractRedis:
         "CLIENT GETREDIR": int,
         "CLIENT TRACKINGINFO": lambda r: list(map(str_if_bytes, r)),
         "CLUSTER ADDSLOTS": bool_ok,
+        "CLUSTER ADDSLOTSRANGE": bool_ok,
         "CLUSTER COUNT-FAILURE-REPORTS": lambda x: int(x),
         "CLUSTER COUNTKEYSINSLOT": lambda x: int(x),
         "CLUSTER DELSLOTS": bool_ok,

redis/cluster.py

@@ -320,6 +320,7 @@ class RedisCluster(RedisClusterCommands):
 
     CLUSTER_COMMANDS_RESPONSE_CALLBACKS = {
         "CLUSTER ADDSLOTS": bool,
+        "CLUSTER ADDSLOTSRANGE": bool,
         "CLUSTER COUNT-FAILURE-REPORTS": int,
         "CLUSTER COUNTKEYSINSLOT": int,
         "CLUSTER DELSLOTS": bool,

redis/commands/cluster.py

@@ -248,6 +248,22 @@ def cluster_addslots(self, target_node, *slots):
             "CLUSTER ADDSLOTS", *slots, target_nodes=target_node
         )
 
+    def cluster_addslotsrange(self, target_node, *slots):
+        """
+        Similar to the CLUSTER ADDSLOTS command.
+        The difference between the two commands is that ADDSLOTS takes a list of slots
+        to assign to the node, while ADDSLOTSRANGE takes a list of slot ranges
+        (specified by start and end slots) to assign to the node.
+
+        :target_node: 'ClusterNode'
+            The node to execute the command on
+
+        For more information check https://redis.io/commands/cluster-addslotsrange
+        """
+        return self.execute_command(
+            "CLUSTER ADDSLOTSRANGE", *slots, target_nodes=target_node
+        )
+
     def cluster_countkeysinslot(self, slot_id):
         """
         Return the number of local keys in the specified hash slot

tests/test_cluster.py

@@ -853,6 +853,12 @@ def test_cluster_addslots(self, r):
         mock_node_resp(node, "OK")
         assert r.cluster_addslots(node, 1, 2, 3) is True
 
+    @skip_if_server_version_lt("7.0.0")
+    def test_cluster_addslotsrange(self, r):
+        node = r.get_random_node()
+        mock_node_resp(node, "OK")
+        assert r.cluster_addslotsrange(node, 1, 5)
+
     def test_cluster_countkeysinslot(self, r):
         node = r.nodes_manager.get_node_from_slot(1)
         mock_node_resp(node, 2)