[Tarantool-patches] [PATCH luajit 2/4][v2] test: introduce a helper read_file

[Sergey Bronnikov via Tarantool-patches <tarantool-patches@dev.tarantool.org>]

From: Sergey Bronnikov <sergeyb@tarantool.org>

The test `lj-366-strtab-correct-size.test.lua` has a test helper
`read_file` that reads a file's content and returns it.
This helper will be useful for a test upcoming in the next commit,
so it is moved to test tools.

Needed for tarantool/tarantool#9595
---
 .../lj-366-strtab-correct-size.test.lua             | 13 +++----------
 test/tarantool-tests/utils/tools.lua                |  8 ++++++++
 2 files changed, 11 insertions(+), 10 deletions(-)

diff --git a/test/tarantool-tests/lj-366-strtab-correct-size.test.lua b/test/tarantool-tests/lj-366-strtab-correct-size.test.lua
index 8a97a441..580fce09 100644
--- a/test/tarantool-tests/lj-366-strtab-correct-size.test.lua
+++ b/test/tarantool-tests/lj-366-strtab-correct-size.test.lua
@@ -9,6 +9,7 @@ local test = tap.test('lj-366-strtab-correct-size'):skipcond({
 })
 
 local ffi = require 'ffi'
+local utils = require('utils')
 
 -- Command below exports bytecode as an object file in ELF format:
 -- $ luajit -b -n 'lango_team' -e 'print()' xxx.obj
@@ -130,7 +131,7 @@ local is64 = is64_arch[jit.arch]
 local function create_obj_file(name)
   local elf_filename = os.tmpname() .. '.obj'
   local lua_path = os.getenv('LUA_PATH')
-  local lua_bin = require('utils').exec.luacmd(arg):match('%S+')
+  local lua_bin = utils.exec.luacmd(arg):match('%S+')
   local cmd_fmt = 'LUA_PATH="%s" %s -b -n "%s" -e "print()" %s'
   local cmd = (cmd_fmt):format(lua_path, lua_bin, name, elf_filename)
   local ret = os.execute(cmd)
@@ -138,14 +139,6 @@ local function create_obj_file(name)
   return elf_filename
 end
 
--- Reads a file located in a specified path and returns its content.
-local function read_file(path)
-  local file = assert(io.open(path), 'cannot open an object file')
-  local content = file:read('*a')
-  file:close()
-  return content
-end
-
 -- Parses a buffer in an ELF format and returns an offset and a size of strtab
 -- and symtab sections.
 local function read_elf(elf_content)
@@ -172,7 +165,7 @@ end
 test:plan(3)
 
 local elf_filename = create_obj_file(MODULE_NAME)
-local elf_content = read_file(elf_filename)
+local elf_content = require('utils').tools.read_file(elf_filename)
 assert(#elf_content ~= 0, 'cannot read an object file')
 
 local strtab, symtab = read_elf(elf_content)
diff --git a/test/tarantool-tests/utils/tools.lua b/test/tarantool-tests/utils/tools.lua
index f35c6922..a2556e32 100644
--- a/test/tarantool-tests/utils/tools.lua
+++ b/test/tarantool-tests/utils/tools.lua
@@ -12,4 +12,12 @@ function M.profilename(name)
   return (arg[0]:gsub('^(.+)/([^/]+)%.test%.lua$', replacepattern))
 end
 
+-- Reads a file located at a specified path and returns its content.
+function M.read_file(path)
+  local file = assert(io.open(path), 'cannot open an object file')
+  local content = file:read('*a')
+  file:close()
+  return content
+end
+
 return M
-- 
2.34.1