Re: [Tarantool-patches] [PATCHv4 3/3] test: change -e assert(false) test using process_timeout module

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

Thanks for the patch!

LGTM

I see no reasons to chaneg for latest two patches.

At least review would be much more easier with a single patch.

On 18.01.2021 15:45, Artem Starshov wrote:
> Removed definitions of functions with timeout. Now they are used
> from separated module process_timeout.lua
>
> Follows up #4983
> ---
>   .../gh-4983-tnt-e-assert-false-hangs.test.lua | 62 +++----------------
>   1 file changed, 9 insertions(+), 53 deletions(-)
>
> diff --git a/test/app-tap/gh-4983-tnt-e-assert-false-hangs.test.lua b/test/app-tap/gh-4983-tnt-e-assert-false-hangs.test.lua
> index c8313770e..20046d7a5 100755
> --- a/test/app-tap/gh-4983-tnt-e-assert-false-hangs.test.lua
> +++ b/test/app-tap/gh-4983-tnt-e-assert-false-hangs.test.lua
> @@ -1,61 +1,17 @@
>   #!/usr/bin/env tarantool
>   
> -local fiber = require('fiber')
> -local clock = require('clock')
> -local ffi = require('ffi')
> -local fio = require('fio')
> -local errno = require('errno')
> +-- Using io.popen and self written module process_timeout
> +-- in presence of the 'popen' built-in module because the
> +-- last one isn't available in 1.10
> +local process_timeout = require('process_timeout')
>   local tap = require('tap')
> +local fio = require('fio')
> +local ffi = require('ffi')
>   
>   --
>   -- gh-4983: tarantool -e 'assert(false)' hangs
>   --
>   
> --- For process_is_alive.
> -ffi.cdef([[
> -    int kill(pid_t pid, int sig);
> -]])
> -
> ----  Verify whether a process is alive.
> -local function process_is_alive(pid)
> -    local rc = ffi.C.kill(pid, 0)
> -    return rc == 0 or errno() ~= errno.ESRCH
> -end
> -
> ---- Returns true if process completed before timeout, false otherwise.
> -local function wait_process_completion(pid, timeout)
> -    local start_time = clock.monotonic()
> -    local process_completed = false
> -    while clock.monotonic() - start_time < timeout do
> -        if not process_is_alive(pid) then
> -            process_completed = true
> -            break
> -        end
> -    end
> -    return process_completed
> -end
> -
> ---- Open file on reading with timeout.
> -local function open_with_timeout(filename, timeout)
> -    local fh
> -    local start_time = clock.monotonic()
> -    while not fh and clock.monotonic() - start_time < timeout do
> -        fh = fio.open(filename, {'O_RDONLY'})
> -    end
> -    return fh
> -end
> -
> ---- Try to read from file with timeout with interval.
> -local function read_with_timeout(fh, timeout, interval)
> -    local data = ''
> -    local start_time = clock.monotonic()
> -    while #data == 0 and clock.monotonic() - start_time < timeout do
> -        data = fh:read()
> -        if #data == 0 then fiber.sleep(interval) end
> -    end
> -    return data
> -end
> -
>   local TARANTOOL_PATH = arg[-1]
>   local output_file = fio.abspath('out.txt')
>   local line = ('%s -e "assert(false)" > %s 2>&1 & echo $!'):
> @@ -73,7 +29,7 @@ local res = tap.test('gh-4983-tnt-e-assert-false-hangs', function(test)
>       local pid = tonumber(io.popen(line):read('*line'))
>       assert(pid, 'pid of proccess can\'t be recieved')
>   
> -    local process_completed = wait_process_completion(pid,
> +    local process_completed = process_timeout.wait_process_completion(pid,
>               process_waiting_timeout)
>   
>       test:ok(process_completed,
> @@ -82,10 +38,10 @@ local res = tap.test('gh-4983-tnt-e-assert-false-hangs', function(test)
>       -- Kill process if hangs.
>       if not process_completed then ffi.C.kill(pid, 9) end
>   
> -    local fh = open_with_timeout(output_file, file_open_timeout)
> +    local fh = process_timeout.open_with_timeout(output_file, file_open_timeout)
>       assert(fh, 'error while opening ' .. output_file)
>   
> -    local data = read_with_timeout(fh, file_read_timeout, file_read_interval)
> +    local data = process_timeout.read_with_timeout(fh, file_read_timeout, file_read_interval)
>       test:like(data, 'assertion failed', 'assertion failure is displayed')
>   
>       fh:close()