[Tarantool-patches] [PATCH v7 09/11] test: use direct log module

[Cyrill Gorcunov <gorcunov@gmail.com>]

To test if we can setup logging module before the box.cfg{}.

Part-of #689

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
---
 test/app-tap/logger.test.lua | 56 ++++++++++++++++++++++++++++++++++--
 1 file changed, 53 insertions(+), 3 deletions(-)

diff --git a/test/app-tap/logger.test.lua b/test/app-tap/logger.test.lua
index 676c860d3..c6f207908 100755
--- a/test/app-tap/logger.test.lua
+++ b/test/app-tap/logger.test.lua
@@ -1,7 +1,7 @@
 #!/usr/bin/env tarantool
 
 local test = require('tap').test('log')
-test:plan(25)
+test:plan(34)
 
 -- gh-3946: Assertion failure when using log_format() before box.cfg()
 local log = require('log')
@@ -10,16 +10,66 @@ _,err = pcall(log, {log_format = 'json'})
 test:ok(err ~= nil)
 
 --
--- Check that Tarantool creates ADMIN session for #! script
+-- gh-689: Operate with logger via log module without calling box.cfg{}
 --
+local json = require('json')
 local filename = "1.log"
+
+-- Test json output
+log.cfg({log=filename, format='json', level=5})
+local m = "info message"
+
+local file = io.open(filename)
+while file:read() do
+end
+
+log.info(m)
+local line = file:read()
+local message = json.decode(line)
+file:close()
+
+test:is(type(message), 'table', "(log) json valid in log.info")
+test:is(message.level, "INFO", "(log) check type info")
+test:is(message.message, m, "(log) check message content")
+
+-- Test runtime change to plain format
+log.log_format('plain')
+local file = io.open(filename)
+while file:read() do
+end
+log.info(m)
+local line = file:read()
+file:close()
+test:is(line:sub(-m:len()), m, m)
+
+-- Test wrong arguments
+_, err = pcall(log.cfg, {format = 'unknown'})
+test:ok(err ~= nil)
+
+-- Test that changes in log module are propagated
+-- back to the box module correctly
+box.cfg{
+    log=filename,
+    log_format='json',
+    log_level=6,
+    memtx_memory=107374182,
+}
+test:is(box.cfg.log_format, 'json', 'box in json format')
+test:is(box.cfg.log_level, 6, 'box level 6')
+log.cfg({format='plain', level=5})
+test:is(box.cfg.log_format, 'plain', 'box sees plain format')
+test:is(box.cfg.log_level, 5, 'box sees level change')
+
+--
+-- Check that Tarantool creates ADMIN session for #! script
+--
 local message = "Hello, World!"
 box.cfg{
     log=filename,
+    log_format='plain',
     memtx_memory=107374182,
 }
 local fio = require('fio')
-local json = require('json')
 local fiber = require('fiber')
 local file = io.open(filename)
 while file:read() do
-- 
2.26.2