amree

Laravel's Dependency Injection Container in Depth

Laravel has a powerful Inversion of Control (IoC) / Dependency Injection (DI) Container. Unfortunately the official documentation doesn't cover all of the available functionality, so I decided to experiment with it and document it for myself. The following is based on Laravel 5.4.26 - other versions may vary.

Introduction to Dependency Injection

I won't attempt to explain the principles behind DI / IoC here - if you're not familiar with them you might want to read What is Dependency Injection? by Fabien Potencier (creator of the Symfony framework).

Accessing the Container

amree

const puppeteer = require('puppeteer');

(async () => {

    const browser = await puppeteer.launch();
    const page = await browser.newPage();
// Adjustments particular to this page to ensure we hit desktop breakpoint.
    page.setViewport({width: 1000, height: 600, deviceScaleFactor: 1});

    await page.goto('https://www.chromestatus.com/samples', {waitUntil: 'networkidle'});

amree

#! /usr/bin/env ruby
# usage:
# $ das_download.rb

require "mechanize"
require "fileutils"

class DasDownloader
  attr_reader :agent, :email, :password

amree

# This is how we use it
retry_until_timeout do
  expect(page).to have_button('Add comment')
  expect(page).to have_text('Cancell')
end

def retry_until_timeout(seconds = 10, message: 'Failed with timeout')
  Timeout.timeout(seconds) do
    loop do
      yield