lujanfernaud

RSpec: Include based on type

# spec/support/user_support.rb
RSpec.configure do |config|
 config.include UserHelper, type: :user
 config.include_context "user_context", type: :use
end

lujanfernaud

# Example:
#
#   > TablesFinder.call(column_name: 'site_id')
#   => ['events', 'users']
class TablesFinder
  VALID_ATTRIBUTES = %w[
    COLUMN_NAME
  ].freeze

  def self.call(args)

lujanfernaud

# Example usage =============
#
#   describe :namespace do
#     include RakeTasksHelper
#
#     describe ':task' do
#       it 'works' do
#         invoke_task('namespace:task')
#       end
#     end

lujanfernaud

RuboCop: Autocorrect Using Specific Cops

We can autocorrect using only some cops by passing --only CopType/CopName.

rubocop --only Style/HashTransformKeys

First run with --safe-auto-correct to see the affected changes:

lujanfernaud

Rails: URL Helpers

Access path helpers from outside controllers.

Rails.application.routes.url_helpers
Rails.application.routes.url_helpers.dashboard_path
Rails.application.routes.url_helpers.users_path
Rails.application.routes.url_helpers.pages_path

lujanfernaud

RSpec: Run Only Failures

In spec/spec_helper.rb:

RSpec.configure do |config|
  # This setting allows us to only re-run examples that had failures.
  # https://relishapp.com/rspec/rspec-core/docs/command-line/only-failures
  #
 # Usage:

lujanfernaud

Rofi: Alt+Tab (Super+Tab) Window Switching

This is using “Super” instead of “Alt”. If you want to use the latter you only need to replace all “Super” instances with “Tab”.

Bash Script

#!/bin/bash

# Related discussion:

lujanfernaud

JavaScript: Avoiding Mutations the Easy Way

Removing an Element from an Array

// Bad:
list.pop()

// Good:
list.filter(element => element !== 'hi')

lujanfernaud

Ruby GraphQL: Custom Scalar Hash

module CustomScalars
  class Hash < GraphQL::Schema::Scalar
    description 'Represents a regular hash.'
  end
end

lujanfernaud

Rails and Capybara: Open Page With Assets

To automatically open pages saved when using save_and_open_page we need to add the launchy gem to the test environment.

# Gemfile

group :test do
  gem 'launchy', '~> 2.4', '>= 2.4.3'
end