[Tarantool-patches] [PATCH v1] test: fix hang of vinyl/select_consistency.* test

["Alexander V. Tikhonov" <avtikhon@tarantool.org>]

During testing process:

  https://gitlab.com/tarantool/tarantool/-/jobs/800863457#L5303

found that test vinyl/select_consistency.test.lua hanged:

  --- vinyl/select_consistency.result		Thu Jun 11 11:59:48 2020
  +++ var/152_vinyl/select_consistency.result	Tue Oct 20 09:13:02 2020
  @@ -137,16 +137,3 @@
   for i = 1, ch:size() do
       ch:get()
   end;
  ----
  -...
  -test_run:cmd("setopt delimiter ''");
  ----
  -- true
  -...

This issue stops the testing till the complete timeout of the test-run
will stop all the testing process. To avoid of it 'wait_cond()' routine
was added to 'ch:get()' command to set it's local timeout to avoid of
waiting for test-run global timeout.

Needed for #4385
---

Github: https://github.com/tarantool/tarantool/tree/avtikhon/gh-4385_hang_select_consistency
Issue: https://github.com/tarantool/tarantool/issues/4385

 test/vinyl/select_consistency.result   | 2 +-
 test/vinyl/select_consistency.test.lua | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/test/vinyl/select_consistency.result b/test/vinyl/select_consistency.result
index f27d0ec68..5a23a674b 100644
--- a/test/vinyl/select_consistency.result
+++ b/test/vinyl/select_consistency.result
@@ -135,7 +135,7 @@ stop = true;
 ---
 ...
 for i = 1, ch:size() do
-    ch:get()
+    test_run:wait_cond(function() return ch:get() end)
 end;
 ---
 ...
diff --git a/test/vinyl/select_consistency.test.lua b/test/vinyl/select_consistency.test.lua
index 73b443e89..6398d09cd 100644
--- a/test/vinyl/select_consistency.test.lua
+++ b/test/vinyl/select_consistency.test.lua
@@ -102,7 +102,7 @@ end;
 
 stop = true;
 for i = 1, ch:size() do
-    ch:get()
+    test_run:wait_cond(function() return ch:get() end)
 end;
 
 test_run:cmd("setopt delimiter ''");
-- 
2.25.1