Hello, Alexander, thnx for review!
Vlad, could you please take a look?

>Четверг, 9 августа 2018, 10:06 +03:00 от Alexander Turenko < alexander.turenko@tarantool.org >:
>
>Hi, Nikita!
>
>The implementation LGTM.
>
>See minor comments about the test below.
>
>Please, proceed the next review round with Vlad.
>
>WBR, Alexander Turenko.
>
>On Wed, Aug 08, 2018 at 03:21:03PM +0300, N.Tatunov wrote:
>> Add string.fromhex method. Add test for string.fromhex().
>>
>> Closes #2562
>> ---
>>
>> Issue: https://github.com/tarantool/tarantool/issues/2562
>> Branch: https://github.com/tarantool/tarantool/tree/N_Tatunov/gh-2562-fromhex-method
>>
>> <...>
>>
>> diff --git a/test/app-tap/string.test.lua b/test/app-tap/string.test.lua
>> index 1d10dcfc9..f88296fff 100755
>> --- a/test/app-tap/string.test.lua
>> +++ b/test/app-tap/string.test.lua
>> @@ -3,7 +3,7 @@
>> local tap = require('tap')
>> local test = tap.test("string extensions")
>>
>> -test:plan(6)
>> +test:plan(7)
>>
>> test:test("split", function(test)
>> test:plan(10)
>> @@ -114,6 +114,25 @@ test:test("hex", function(test)
>> test:is(string.hex(""), "", "hex empty string")
>> end)
>>
>> +test:test("fromhex", function(test)
>> + test:plan(11)
>> + test:is(string.fromhex("48656c6c6f"), "Hello", "from hex to bin")
>> + test:is(string.fromhex("4c696e7578"), "Linux", "from hex to bin")
>> + test:is(string.fromhex("6C6F72656D"), "lorem", "from hex to bin")
>> + test:is(string.fromhex("697073756D"), "ipsum", "from hex to bin")
>> + test:is(string.fromhex("6c6f72656d"), "lorem", "from hex to bin")
>> + test:is(string.fromhex("697073756d"), "ipsum", "from hex to bin")
>> + test:is(string.fromhex("6A6B6C6D6E6F"), "jklmno", "from hex to bin")
>> + test:is(string.fromhex("6a6b6c6d6e6f"), "jklmno", "from hex to bin")
>> + local _, err = pcall(string.fromhex, 'aaa')
>
>Use double quotes when a file primarily uses this quotes type.
>

Fixed.

>> + test:ok(err and err:match("(even amount of chars expected," ..
>> + " got odd amount)"), err)
>
>1. Indent is strange (don't get what is the rule).
>2. Don't use `err` for diagnostics (the message could can be unusable in case of an
>   error).

Didn't notice it, thnx.
>
>> + local _, err = pcall(string.fromhex, 'qq')
>
>Single qutoes -> doule quotes.
>

Fixed.

>> + test:ok(err and err:match("(hex string expected, got non hex chars)"), err)
>> + local _, err = pcall(string.fromhex, 795)
>> + test:ok(err and err:match("(string expected, got " .. type(795) .. ")"))
>
>type(795) -> number
>

Changed.

>> +end)
>> +
>> test:test("strip", function(test)
>> test:plan(6)
>> local str = " hello hello "
>> --
>> 2.15.2 (Apple Git-101.1)
>>


--
WBR, Nikita Tatunov.