Ruby on Rails Screencast Tutorials - Page 11

Webpacker provides some nice tools for loading Javascript in several different ways. We're looking at require.context to see how to load an entire directory's set of files easily.

22m

Testing File Uploads in Rails with Shrine

Mar 23, 2020 Pro

Testing file uploads can be tricky, but Shrine makes both file uploading and testing a lot easier than you might expect.

16m

Testing ActiveStorage File Uploads and Fixtures

Feb 17, 2020 Pro

Learn how to test ActiveStorage file uploads and create fixtures with ActiveStorage attachments

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Realtime Online User Tracking with ActionCable

Feb 10, 2020 Pro

If we want to add realtime tracking of which users are online, we can use active websocket connections through ActionCable to keep track.

How to use Mocks in Ruby tests

Mocks are a handy tool for writing tests in Ruby. You can use them to fake an object and verify that the correct methods were called against it. Perfect for testing a method that integrates closely with another class or module.

How to use Test Stubs with Minitest

Dec 30, 2019 Pro

Test stubs are very handy when you want to mock out the response to a method call. This allows your tests to be more reliable and skip long running or unnecessary method calls.

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Refactoring Rubocop GitHub Action

Dec 16, 2019 Pro

Today we're refactoring Andrew Mason's GitHub Action that runs Rubocop against your repository. We'll pull out some concepts, remove conditionals, and use several other techniques to clean up the code.

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Testing Rails ActionCable with Devise

Dec 09, 2019 Pro

Testing ActionCable authentication with Devise is pretty easy, especially when we build our own helpers to stub out Warden

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How to test ActionMailer in Rails

Dec 02, 2019 Pro

Rails provides several really useful test helpers for ActionMailer so we can quickly iterate on our design, test that our code queues up the right emails, and make sure our emails contain the right content.

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Testing External APIs with VCR

Oct 29, 2019 Pro

Testing integrations with external APIs in your Rails app can be hard. You don't know what requests are being made (or even the responses), so how can you properly mock them out? VCR to the rescue.

Testing API Integrations with WebMock

Oct 23, 2019 Pro

WebMock is a fantastic way to stub out and mock your HTTP requests. It will actually throw an exception in your test suite when an HTTP request is made so that you know when you're hitting an external API that you haven't stubbed out correctly.

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How to write Controller & Integration Tests in Rails

Oct 02, 2019 Pro

Learn how to write integration tests in Rails to test controllers and actions

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How to use Fixtures to create sample test data

Sep 18, 2019 Pro

You can use Fixtures in Rails to create sample database records for your tests to run against. They're easy to setup and extremely quick.

13m

Test Driven Development Basics

Sep 10, 2019 Pro

Test Driven Development, or TDD, is a pretty simple process that allows you to write your code in conjunction with tests to ensure a high level of confidence and code coverage.

10m

Handle Race Conditions with Pessimistic Locking

Aug 22, 2019 Pro

Race conditions can cause problems with data integrity. We can prevent these issues with Pessimistic Locking in ActiveRecord which uses database row-level locking.

10m

Preventing Conflicts with Optimistic Locking

Aug 15, 2019 Pro

When things (users, jobs, etc) attempt to update the same record at the same time, we can often lose changes. Optimistic locking uses a lock version number to warn you about updating stale objects so you can handle that safely.