DEV Community: Ruslan Kornev

is_expected RSpec ActiveRecord matcher

Ruslan Kornev — Mon, 03 Jul 2023 00:01:07 +0000

Hi, it's a super short and however helpful post about custom RSpec AR matcher. Do you like the conciseness of the code like me?

I like tests that use the simple is_expected method. Take a look at the differences:

subject { 1 == 1 }

it { is_expected.to be_true }

instead of

expect(subject).to be_true

Maybe in this example, the problem is not so evident, but take a look at the following example:

Suppose we have validation on Post.title presence

subject { Post.new }

expect(subject.errors.of_kind?((:title, :presence))).to be_true

https://api.rubyonrails.org/classes/ActiveModel/Errors.html#method-i-of_kind-3F

Looks weird? So it would be cool if we could make it more expressive, right, for example like this:

it { is_expected.to has_errors(:title, :presence) }

To do this way is super simple. Take a look at custom matchers: https://rspec.info/documentation/3.0/rspec-expectations/RSpec/Matchers

As a reference, you may copy code from my open-source project:

https://github.com/woto/hub/commit/c45db2b33e85cec3fbbb69dfb3fac23a53d28051#diff-426a7f720d57b5501d595e6b1be7cb844598ebe8a4b584d32f1268b6056f3d2bR57

What do you think? May be I should even create gem with this feature? Or may be it's already exists and I don't hear about it?!

Project "Roast me".

Ruslan Kornev — Sat, 10 Jun 2023 11:05:22 +0000

Hi guys, today I want to introduce you my non-commercial open-source pet project. I can't say that everything turned out exactly as I wanted. It is slow for now, it does not have fully implemented all features that I want. But I want to move to this goal.

https://roastme.ru

Also I'm looking for a new job. I'm a Ruby on Rails + TypeScript programmer. If you know good places where I can apply let me know please. I am currently at Kyrgyzstan now. https://www.linkedin.com/in/ruslan-kornev

What is the project about?

It's about getting something new, something interesting, something you could missed due to the hard work that should help you or your company to win the race in IT era.

Why I'm developing it?

After my previous failure to create a commercial project I decided to create another one. And I found that there are too many topics to consider when creating something new. And I tried to formalize list of things that araise against each indie developer, let's go:

List of problems arising against of creator

A list of places where people collect lists of "startup ideas". Often it looks like bullshit, usually with superficial approach to the problem. Usually maintained by one person. And usually without any conversations. But they have a right to exist. And there are diamonds among the dirt.
- https://github.com/samsquire/ideas
- https://github.com/dev-aniketj/awesome-app-ideas
There are places where people share their thoughts about the perfect tools or the pain of using them.
- https://www.indiehackers.com
The vast majority of sites, as you might have guessed, are similar to startup pitch sites. Where developers share their projects, trying to watch the reaction of the public, trying to get feedback or evolve new ideas.
OK, maybe now you have a startup idea. The next problem is to find commercial projects, alternatives etc... and it is huge problem too. You can devote some time searching for alternatives and get upset when after N days/months you still find out about their existence. Or you can "never" climb out of searching analogues.
Finally you decided to develop your application and then you have next steps in this quest. I think no one doubts that last years the area of AI made giant steps toward future software. And so therefore there is another item of the list - is to check AI solutions to the solving problem.

Next depending of your qualification as a software developer or not you may choose different steps. For example if you are a Developer or not:

As a Developer

You wanna check SaaS solutions for implementation of your idea, it could be Authentication tasks or Hosting platforms, or Image processing services, etc...
- https://github.com/ripienaar/free-for-dev
- https://github.com/255kb/stack-on-a-budget
You also wanna check open source solutions, libraries and software.
- https://github.com/RunaCapital/awesome-oss-alternatives
- https://github.com/awesome-selfhosted/awesome-selfhosted
You wanna check current trends in software development, may be there are new techniques of making old things with new instruments.
- https://github.com/kuchin/awesome-cto

As a not developer

You wanna find places where you could find software activists, or trying to implement you idea yourself with no-code or low-code solutions
- https://webflow.com
- https://bubble.io

All these steps require remarkable amount of time.

How does the project tries to solve the problem?

Nothing more than just simple tagging of pages. At this stage it works like https://alternative.to. You most likely know about you area of interests from Internet or based on your experience. For example you interested in no-code databases and want to find more about them and you know there is at least one product Airtable

You visit the Airtable entity page.

https://roastme.ru/entities/421?q=airt

And from that point you may view pages where this product was mentioned and which other products were also mentioned.

Seems not too relevant yet. But if you select at least one analogue, then you hint which direction you are interested

Bingo!

As I told yealier it is not related only to software.

Interested in Ruby?

Natural Language Processing?

Technical Youtube channels?

Searching remote IT jobs?

Interested in web scrapping?

Preparing to the interviews?

Architecture patterns?

Yep, I know about:

But the main difference that you will be able to subscribe to interested entities and discover something related new when they will be mentioned with unknown to you entities.

And much much more soon. Interested? Support me with word in comments or deed.

Scrollable and draggable carousel

Ruslan Kornev — Mon, 08 Aug 2022 01:04:00 +0000

Hello, stranger. I searched the entire Internet in search of a scrollable and draggable carousel, for three days. Finally decided to create my own. Also decided to share it with you. If you know how to make it event better then let me know in the comments :)

Demo

Kudos to these original works:
https://codepen.io/toddwebdev/pen/yExKoj
https://codesandbox.io/s/framer-motion-usescroll-element-scrolling-eg6fm3

For google users
"framer motion", "carousel", "draggable", "scrollable", "progress", "typescript", "react"

Suppressing Ruby 2.7.0 warnings in RubyMine and zsh/bash

Ruslan Kornev — Sat, 21 Mar 2020 22:56:43 +0000

Hi all. If you've already decided to use Ruby 2.7.0 you may struggle with warnings like this one:

/Users/r.kornev/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/actionpack-6.0.2.2/lib/action_dispatch/middleware/stack.rb:37: warning: Using the last argument as keyword parameters is deprecated; maybe ** should be added to the call
/Users/r.kornev/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/actionpack-6.0.2.2/lib/action_dispatch/middleware/static.rb:110: warning: The called method `initialize' is defined here
Running via Spring preloader in process 1224
Loading development environment (Rails 6.0.2.2)
irb(main):001:0> Post.first
   (6.7ms)  SELECT sqlite_version(*)
  Post Load (0.1ms)  SELECT "posts".* FROM "posts" ORDER BY "posts"."id" ASC LIMIT ?  [["LIMIT", 1]]
/Users/r.kornev/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/activemodel-6.0.2.2/lib/active_model/type/integer.rb:13: warning: Using the last argument as keyword parameters is deprecated; maybe ** should be added to the call
/Users/r.kornev/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/activemodel-6.0.2.2/lib/active_model/type/value.rb:8: warning: The called method `initialize' is defined here
=> nil

I didn't understand is there a way to add a global environment variable which could affect all running processes like zsh, bash, RubyMine in MacOS Catalina.

So I've decided to split solutions:

RubyMine

Open Run -> Edit configurations

Then in an appropriate configuration add RUBYOPT=-W:no-deprecated -W:no-experimental

zsh/bash

Add export RUBYOPT="-W:no-deprecated -W:no-experimental"
to ~/.zshrc or/and ~/.bashrc

That's it :)

You also may be interested in these articles: