[Tarantool-patches] [PATCH] Netbox connection and self are interchangable

[Maria]

Despite what was stated in the documentation
netbox.connect was not always equivalent to
netbox.self. In particular, they converted
tuple to different types - table and cdata
respectively.
The patch is fixed so that it now covers all
cases where netbox.connect and netbox.self
perform conversion of types - e.g., box.error.

Closes #4513
Issue:
https://github.com/tarantool/tarantool/issues/4513
Branch:
https://github.com/tarantool/tarantool/compare/eljashm/gh-4513-netbox.self-convert-tuples-to-table-type
---
 src/box/lua/net_box.lua   | 11 ++++++++++-
 test/box/net.box.result   | 32 ++++++++++++++++++++++++++++++++
 test/box/net.box.test.lua | 14 ++++++++++++++
 3 files changed, 56 insertions(+), 1 deletion(-)

diff --git a/src/box/lua/net_box.lua b/src/box/lua/net_box.lua
index 31a8c16b7..c30e6bced 100644
--- a/src/box/lua/net_box.lua
+++ b/src/box/lua/net_box.lua
@@ -1518,7 +1518,16 @@ local function handle_eval_result(status, ...)
         rollback()
         return box.error(E_PROC_LUA, (...))
     end
-    return ...
+    if not ... then
+        return ...
+    end
+    local results = {...}
+    for n, res in pairs(results) do
+        if type(res) == 'cdata' then
+            results[n] = res:__serialize()
+        end
+    end
+    return unpack(results)
 end
 
 this_module.self = {
diff --git a/test/box/net.box.result b/test/box/net.box.result
index e3dabf7d9..805492bb1 100644
--- a/test/box/net.box.result
+++ b/test/box/net.box.result
@@ -3930,3 +3930,35 @@ test_run:grep_log('default', '00000040:.*')
 box.cfg{log_level=log_level}
 ---
 ...
+--
+-- gh-4513 netbox.connect returns table but netbox.self does not
+--
+space = box.schema.space.create('gh4513')
+---
+...
+box.schema.user.grant('guest','read, write, execute','universe')
+---
+...
+idx = box.space.gh4513:create_index('primary')
+---
+...
+box.space.gh4513:insert({1})
+---
+- [1]
+...
+type(remote.connect(box.cfg.listen):eval("return box.space.gh4513:get({1})"))
+---
+- table
+...
+type(remote.self:eval("return box.space.gh4513:get{1}"))
+---
+- table
+...
+type(remote.connect(box.cfg.listen):eval('return box.error.new(1, "test error")'))
+---
+- string
+...
+type(remote.self:eval('return box.error.new(1, "test error")'))
+---
+- string
+...
diff --git a/test/box/net.box.test.lua b/test/box/net.box.test.lua
index 8e65ff470..b84e75e3d 100644
--- a/test/box/net.box.test.lua
+++ b/test/box/net.box.test.lua
@@ -1583,3 +1583,17 @@ test_run:wait_log('default', '00000030:.*', nil, 10)
 test_run:grep_log('default', '00000040:.*')
 
 box.cfg{log_level=log_level}
+
+--
+-- gh-4513 netbox.connect returns table but netbox.self does not
+--
+space = box.schema.space.create('gh4513')
+box.schema.user.grant('guest','read, write, execute','universe')
+idx = box.space.gh4513:create_index('primary')
+box.space.gh4513:insert({1})
+
+type(remote.connect(box.cfg.listen):eval("return box.space.gh4513:get({1})"))
+type(remote.self:eval("return box.space.gh4513:get{1}"))
+
+type(remote.connect(box.cfg.listen):eval('return box.error.new(1, "test error")'))
+type(remote.self:eval('return box.error.new(1, "test error")'))
-- 
2.20.1 (Apple Git-117)