根据keyspace获取databases num时，需要加1 (hhyo#2573)

Co-authored-by: 王飞 <fei.wang@xgo.one>

Author: feiazifeiazi

.gitignore

@@ -1,5 +1,6 @@
 *.pyc
 *.swp
+.vscode/*
 *.lock
 *.log
 .idea/

sql/engines/redis.py

@@ -70,7 +70,7 @@ def get_all_databases(self, **kwargs):
                 for i in conn.info("Keyspace").keys()
                 if len(i.split("db")) == 2
             ]
-            rows = max(dbs + [16])
+            rows = max(dbs + [15]) + 1
 
         db_list = [str(x) for x in range(int(rows))]
         result.rows = db_list

sql/engines/tests.py

@@ -304,6 +304,28 @@ def test_get_all_databases(self, _config_get):
         dbs = new_engine.get_all_databases()
         self.assertListEqual(dbs.rows, ["0", "1", "2", "3"])
 
+    @patch("redis.Redis.info")
+    @patch("redis.Redis.config_get")
+    def test_get_all_databases_exception_handling(self, mock_config_get, mock_info):
+        # 模拟config_get方法抛出异常
+        mock_config_get.side_effect = Exception("模拟config_get异常")
+        # 模拟info方法返回特定的Keyspace信息
+        mock_info.return_value = {
+            "db0": "some_info",
+            "db1": "some_info",
+            "db18": "some_info",
+        }
+        # 实例化RedisEngine并调用get_all_databases方法
+        new_engine = RedisEngine(instance=self.ins)
+        result = new_engine.get_all_databases()
+        # 验证返回的数据库列表是否符合预期.
+        expected_dbs = [str(x) for x in range(int(19))]
+        self.assertListEqual(result.rows, expected_dbs)
+        # 验证config_get方法被调用
+        mock_config_get.assert_called_once_with("databases")
+        # 验证info方法被调用
+        mock_info.assert_called_once_with("Keyspace")
+
     def test_query_check_safe_cmd(self):
         safe_cmd = "keys 1*"
         new_engine = RedisEngine(instance=self.ins)