[tarantool-patches] [PATCH] Check self arg passed for router objects

[AKhatskevich <avkhatskevich@tarantool.org>]

Raise an exception in case someone calls router like
`router.info()` instead of `router:info()`.
---
 test/multiple_routers/multiple_routers.result   | 5 +++++
 test/multiple_routers/multiple_routers.test.lua | 3 +++
 vshard/router/init.lua                          | 9 +++++++++
 3 files changed, 17 insertions(+)

diff --git a/test/multiple_routers/multiple_routers.result b/test/multiple_routers/multiple_routers.result
index 33f4034..389bf9a 100644
--- a/test/multiple_routers/multiple_routers.result
+++ b/test/multiple_routers/multiple_routers.result
@@ -201,6 +201,11 @@ routers[5]:call(1, 'read', 'do_select', {2})
 ---
 - [[2, 2]]
 ...
+-- Self checker.
+util.check_error(router_2.info)
+---
+- Use router:info(...) instead of router.info(...)
+...
 _ = test_run:cmd("switch default")
 ---
 ...
diff --git a/test/multiple_routers/multiple_routers.test.lua b/test/multiple_routers/multiple_routers.test.lua
index 6d470e1..2f159c7 100644
--- a/test/multiple_routers/multiple_routers.test.lua
+++ b/test/multiple_routers/multiple_routers.test.lua
@@ -76,6 +76,9 @@ vshard.router.call(1, 'read', 'do_select', {1})
 router_2:call(1, 'read', 'do_select', {2})
 routers[5]:call(1, 'read', 'do_select', {2})
 
+-- Self checker.
+util.check_error(router_2.info)
+
 _ = test_run:cmd("switch default")
 test_run:cmd("stop server router_1")
 test_run:cmd("cleanup server router_1")
diff --git a/vshard/router/init.lua b/vshard/router/init.lua
index 128628b..e0a39b2 100644
--- a/vshard/router/init.lua
+++ b/vshard/router/init.lua
@@ -860,6 +860,15 @@ local router_mt = {
     }
 }
 
+--
+-- Wrap self methods with a sanity checker.
+--
+local mt_index = {}
+for name, func in pairs(router_mt.__index) do
+    mt_index[name] = util.generate_self_checker("router", name, router_mt, func)
+end
+router_mt.__index = mt_index
+
 -- Table which represents this module.
 local module = {}
 
-- 
2.14.1