How to configure delayed_job to work on development environment

Category: Ruby :: Published at: 14.10.2021

Please take a note, that this is only brain shortcut for my personal use. 

It won't tell you how to install and configure delayed job on your computer.

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How to filter stacktrace in byebug

Category: Ruby :: Published at: 12.10.2021

Sometimes simple debugging with byebug is not enough and you need to dive deeper.

If you need to get the stacktrace you can simply use command:

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RSpec - How to chain .to change matcher in rubocop

Category: Ruby :: Published at: 23.09.2021

If you use rubocop and want to chain [.to change] matcher, it can be quite confusing.

Here is how you should do it correctly:

subject(:service_call) { id) }

let(:car) { create :car }

it "passes test" do
  expect { service_call }.to(
    change { car.brand }.to("Opel")
      .and(change { car.model }.to("Astra")
      .and(change { car.production_year }.to(1997),

How to connect NGROK with a Rails application

Category: Ruby :: Published at: 01.07.2021

Ngrok let us to publish our local application for the world. It is very useful for example if we want to create a webhook integration.

These are simple steps to connect NGROK with your rails application:

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Rspec not_to change .and not_to change - how to do it?

Category: Ruby :: Published at: 29.06.2021

We can't chain not_to change .and not_to change in one rspec matcher call.

But the gem creators made for us some simple and very useful workaround:

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How to test raise_error matcher if it gets an error

Category: Ruby :: Published at: 23.06.2021

The problem with raise_error matcher in RSpec is common and it can be fixed in easy way.

Let's say we have situation like below:

subject(:service_call) { }

it { expect(service_call).to raise_error(CarDatabaseConnectionError) }

If we call it like this it will get us an error.

  1) CarUpdateService when fail 
     Failure/Error: raise CarDatabaseConnectionError
       Can't connect with a custom car database.

Why it didn't pass the spec?

The problem is here:

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