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Date: Wed, 3 Apr 2019 15:01:21 +0300
From: Vladimir Davydov <vdavydov.dev@gmail.com>
Subject: Re: [tarantool-patches] Re: [PATCH v2 2/2] lua: add key_def lua
 module
Message-ID: <20190403120121.gborrlvg36ghfuhx@esperanza>
References: <cover.1553696707.git.kshcherbatov@tarantool.org>
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 <20190328020146.lluz4mg5tacpghwv@tkn_work_nb>
 <35ed4661-9789-7cf1-6627-2ced2a821939@tarantool.org>
 <6d915212-e80f-4a6d-d884-b838bf25f8a7@tarantool.org>
 <20190328112158.kpxsk6b55noicbes@tkn_work_nb>
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In-Reply-To: <20190403114644.25bf3mull76xk7xp@tkn_work_nb>
To: Alexander Turenko <alexander.turenko@tarantool.org>
Cc: Kirill Shcherbatov <kshcherbatov@tarantool.org>, tarantool-patches@freelists.org
List-ID: <tarantool-patches.dev.tarantool.org>

On Wed, Apr 03, 2019 at 02:46:44PM +0300, Alexander Turenko wrote:
> > > +-- Case: extract_key().
> > > +test:test('extract_key()', function(test)
> > > +    test:plan(9)
> > > +
> > > +    test:is_deeply(key_def_a:extract_key(tuple_a):totable(), {1}, 'case 1')
> > > +    test:is_deeply(key_def_b:extract_key(tuple_a):totable(), {1, 22}, 'case 2')
> > > +
> > > +    -- JSON path.
> > > +    local res = key_def_lib.new({
> > > +        {type = 'string', fieldno = 1, path = 'a.b'},
> > > +    }):extract_key(box.tuple.new({{a = {b = 'foo'}}})):totable()
> > > +    test:is_deeply(res, {'foo'}, 'JSON path (tuple argument)')
> > > +
> > > +    local res = key_def_lib.new({
> > > +        {type = 'string', fieldno = 1, path = 'a.b'},
> > > +    }):extract_key({{a = {b = 'foo'}}}):totable()
> > > +    test:is_deeply(res, {'foo'}, 'JSON path (table argument)')
> > 
> > I like key_def_new_cases - they are very easy to read or extend.
> > I don't quite like the tests below, because they refer to objects
> > created a few screens above (tuple_a, key_def_a, etc). Could you
> > please rewrite them in a similar to key_def_new_cases fashion,
> > without referring to any predefined variables?
> 
> It is easy to separate test cases from a testing code in case of one
> function like key_def.new(), but it is not so easy when we need to test
> several functions with different behaviour. So I vote up for inlining
> related data (tuple_a and so on) to test cases, but doubt these cases
> could be written in such declarative manner as I did for key_def.new().

I didn't mean to mix all function test cases in one table. I meant
using a separate table for each function. Something like this:

tuple_compare_test_cases = {
	{
		'Tuple compare with collation',
		parts = {{
			fieldno = 1,
			type = 'string',
			collation = 'unicode_ci',
		}},
		tuple1 = {'test1', 1, 2},
		tuple2 = {'test2', 3},
		exp_err = nil,
		exp_ret = 1,
	}
	...
}

tuple_extract_key_cases = {
	...
}

Do you think it would be an overkill?