[Tarantool-patches] [PATCH v1] test: fix flaky replication/status.test.lua

[Alexander V. Tikhonov]

Found issue:

 [009] --- replication/status.result	Wed May  6 09:03:18 2020
 [009] +++ replication/status.reject	Tue May 12 15:55:09 2020
 [009] @@ -307,11 +307,12 @@
 [009]  ...
 [009]  r.upstream.status == "stopped"
 [009]  ---
 [009] -- true
 [009] +- false
 [009]  ...
 [009]  r.upstream.message:match('Duplicate') ~= nil
 [009]  ---
 [009] -- true
 [009] +- error: '[string "return r.upstream.message:match(''Duplicate'') ..."]:1: attempt
 [009] +    to index field ''message'' (a nil value)'
 [009]  ...
 [009]  test_run:cmd('switch default')
 [009]  ---

To check the upstream status and it's message need to wait until an
upstream appears. This prevents an attempt to index a nil value when
one of those functions are called before a record about a peer appears
in box.info.replication. It was observed on test:
  replication/show_error_on_disconnect
after commit
  c6bea65f8ef5f6c737cf70c0127189d0ebcbc36e ('replication: recfg with 0
quorum returns immediately').

Closes #4969
---

Github: https://github.com/tarantool/tarantool/tree/avtikhon/gh-4969-replication-status
Issue: https://github.com/tarantool/tarantool/issues/4969

 test/replication/status.test.lua | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/test/replication/status.test.lua b/test/replication/status.test.lua
index a26fec74b..090968172 100644
--- a/test/replication/status.test.lua
+++ b/test/replication/status.test.lua
@@ -110,9 +110,7 @@ box.space._schema:insert({'dup'})
 test_run:cmd('switch default')
 box.space._schema:insert({'dup'})
 test_run:cmd('switch replica')
-r = box.info.replication[1]
-r.upstream.status == "stopped"
-r.upstream.message:match('Duplicate') ~= nil
+test_run:wait_upstream(1, {status = 'stopped', message_re = 'Duplicate'})
 test_run:cmd('switch default')
 box.space._schema:delete({'dup'})
 test_run:cmd("push filter ', lsn: [0-9]+' to ', lsn: <number>'")
-- 
2.17.1