Hi, Sergey

thanks for the patch! see my comments below.

This patch moves the aforementioned test from the <misc> to the <lang/>

directory, includes it in <index>, names the subtests, and adjusts the
linenumbers in the assertions to match LuaJIT behaviour and the new code

layout.

+ formatting changes

Part of tarantool/tarantool#9398
---
 test/LuaJIT-tests/lang/hook_line.lua | 44 ++++++++++++++++++++++++++++
 test/LuaJIT-tests/lang/index         |  1 +
 test/LuaJIT-tests/misc/hook_line.lua | 41 --------------------------
 3 files changed, 45 insertions(+), 41 deletions(-)
 create mode 100644 test/LuaJIT-tests/lang/hook_line.lua
 delete mode 100644 test/LuaJIT-tests/misc/hook_line.lua

diff --git a/test/LuaJIT-tests/lang/hook_line.lua b/test/LuaJIT-tests/lang/hook_line.lua
new file mode 100644
index 00000000..bb89c4b8
--- /dev/null
+++ b/test/LuaJIT-tests/lang/hook_line.lua
@@ -0,0 +1,44 @@
+local lines = {}
+local function hook()
+  lines[#lines + 1] = debug.getinfo(2).currentline
+end
+
+local function dummy()
+end -- <-- line 7
+
+do --- Base test: cycles, function calls.
+  debug.sethook(hook, "l", 0)
+  -- <-- line 11
+  local x
+  dummy()
+  local y = 1
+  dummy() dummy()
+  local z = 2; local r = true
+  while y < 4 do y = y + 1 end
+  while z < 4 do
+    z = z + 1
+  end
+  -- <-- line 21
+  local v
+  debug.sethook(nil, "", 0)
+
+  assert(#lines > 0)
+  while lines[1] < 10 do table.remove(lines, 1) end
+  while lines[#lines] > 20 do table.remove(lines) end
+
+  local s = table.concat(lines, " ")
+  assert(s == "12 13 7 14 15 7 7 16 17 17 17 17 18 19 18 19 18" or
+         s == "12 13 7 14 15 7 15 7 16 17 17 17 17 18 19 18 19 18")
+end
+
+do --- Not visited the end of the function definition.
+  lines = {}
+  local function f()
+    if true then return end
+    local function x() end
+  end -- <-- line 39

test depends on a number of lines in the file, please add a note about it at the beginning of the file

+  debug.sethook(hook, "l", 0)
+  f()
+  debug.sethook(nil, "", 0)
+  for i = 1, #lines do assert(lines[i] ~= 39) end
+end
diff --git a/test/LuaJIT-tests/lang/index b/test/LuaJIT-tests/lang/index
index 8cecfa08..ae59bc56 100644
--- a/test/LuaJIT-tests/lang/index
+++ b/test/LuaJIT-tests/lang/index
@@ -9,6 +9,7 @@ constant
 dualnum.lua
 for.lua
 hook_active.lua
+hook_line.lua
 length.lua
 lightud.lua
 modulo.lua
diff --git a/test/LuaJIT-tests/misc/hook_line.lua b/test/LuaJIT-tests/misc/hook_line.lua
deleted file mode 100644
index 36f71080..00000000
--- a/test/LuaJIT-tests/misc/hook_line.lua
+++ /dev/null
@@ -1,41 +0,0 @@
-local lines = {}
-local function hook()
-  lines[#lines+1] = debug.getinfo(2).currentline
-end
-
-local function dummy()
-end -- <-- line 7
-
-debug.sethook(hook, "l", 0)
--- <-- line 10
-local x
-dummy()
-local y = 1
-dummy() dummy()
-local z = 2; local r = true
-while y < 4 do y = y + 1 end
-while z < 4 do
-  z = z + 1
-end
--- <-- line 20
-local v
-debug.sethook(nil, "", 0)
-
-assert(#lines > 0)
-while lines[1] < 10 do table.remove(lines, 1) end
-while lines[#lines] > 20 do table.remove(lines) end
-
-local s = table.concat(lines, " ")
-assert(s == "11 12 7 13 14 7 7 15 16 16 16 16 17 18 17 18 17" or
-       s == "11 12 7 13 14 7 14 7 15 16 16 16 16 17 18 17 18 17")
-
-lines = {}
-local function f()
-  if true then return end
-  local function x() end
-end -- <-- line 36
-debug.sethook(hook, "l", 0)
-f()
-debug.sethook(nil, "", 0)
-for i=1,#lines do assert(lines[i] ~= 36) end
-