FactoryBot traits cannot use :class; a nested factory or initialize_with can build the desired subtype instead.

spreewald now provides a binary that lists available steps and can filter them by a search term.

Faker now reads strings from locale files, which can trigger confusing translation missing errors when locale data is incomplete.

Custom RSpec matcher for checking whether an array is naturally ordered; now part of Spreewald.

A while ago we were working on an application that had an entire version specially created for mobiles, such as the iPhone. This specific application was entirely tested with Capybara, Steak and Selenium Webdriver. Although the test suite wasn’t the fastest one in the world, the web application was very well tested, and to guarantee that we would also be testing the mobile version, we would have to simulate an iPhone user agent accessing the application.

But wait, you might be thinking that we are not able to change browser headers while ...

RSpec be_false matches nil, so a false check can pass unexpectedly. Use == false when the value must be exactly false.

Missing PostgreSQL types and query helpers for Rails 4.x make native array, CTE, and network-style filtering easier in ActiveRecord and Arel.

Common ignore list for source control that keeps logs, temporary files, local databases, IDE settings, and generated assets out of git history.

VirtualBox NAT guests can reach the host at 10.0.2.2; vbox.srv is the matching hostname for shared folders and host web server access.

Spreewald 1.1.0 removes be_true and be_false to stay compatible with RSpec 3 and Ruby 2, replacing them with == true and == false.

ab can report successful responses as failed when later replies differ in content length from the first response. The Length counter often indicates this false positive.

Failed @javascript Cucumber steps can close the Selenium browser before the page state is inspected. Keeping the window open on failure helps debug the created data.

Look up the model class behind a FactoryBot factory name; FactoryBot.factories.find('admin').build_class returns the associated class.

Feature files in nested directories can stop Cucumber from loading env.rb and step definitions unless the features directory is required explicitly.

Creates a db:seed:dump rake task that generates db/seeds.rb from the current database state for replayable sample data.

Disabled form inputs can be hard to locate in Capybara when Selenium skips them; passing disabled: true makes them searchable.

Imagine all the syntactical delights of Ruby and Haml for your JavaScript. You write in a nice language, but get normal JavaScript at runtime. All whilst having full access to 3rd-party JavaScript libraries (jQuery, PrototypeJS), debugging support (it becomes pure, readable JavaScript), existing support from test suites (it’s normal JavaScript) and growing support from various text editors (TextMate, Vim, Emacs).

Disabling source maps in Webpacker can reduce exposed code and simplify builds. Set config.devtool = 'none' in an environment-specific webpack config.

Real data makes demos and screenshots look convincing, but names and values need masking to avoid exposing sensitive information. Faker can quickly replace personal details with plausible placeholders.

Pricing decisions are hard to get right, and small changes can affect revenue and customer response. Practical pricing experiments offer ideas for improving pricing strategy.

Placeholder image generation for specific dimensions and topics is useful when building layouts, prototypes, or content mockups without final artwork.

Preview Subtle Patterns textures on a site without swapping images or changing CSS.