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.

Determining whether an element is truly visible in the browser can differ across JavaScript libraries; jQuery and Prototype use different visibility rules.

Bulk loading huge datasets into InnoDB can take hours or days and strain disk, logs, and indexes; careful tuning keeps imports from dragging on indefinitely.

Preview email in the browser instead of sending it, making message review and debugging easier during development.

Check a hostname’s current IP address and DNS records against name servers worldwide to verify DNS propagation after zone changes.

Wrapping a string in this class gives you a prettier way to test for equality.

Adds a slide out panel to your Rails application that directs clients to test stories that have been marked as 'delivered' in Pivotal Tracker.

Use like this:

power-rake db:migrate VERSION=20100913132321

By default the environments development, test, cucumber and performance are considered. The script will not run rake on a production or staging environment.

This script is part of our geordi gem on github.

A fake filesystem. Use it in your tests.

This project is (or will be) a best effort semi-static verifier for your Ruby on Rails projects. Delivered as a Ruby gem it provides a shell command task "railscheck" that you can run against your Rails projects to test for a number of typical bugs, potential problems and inconsistencies.

Integrity is the angel watching over your shoulder while you code. As soon as you push your commits, it builds, runs your tests, and makes sure everything works fine.

Or, you can test your Rack application (or Sinatra, or Rails, or Merb) using arbitrary HTTP client libraries, to check interoperability.

Write declarative tests using nested contexts without performance penalties. Contest is less than 100 lines of code and gets the job done.

Riot differs primarily in that it does not rerun setup for each test in a context.

• Unlock achievements for running your test suite!

ShamRack mounts a Rack app locally, just for your tests. It goes one further: it “mounts” it using Net::HTTP such that requests to the Rack app never hit any network.

The Holy Grail of testing for front-end development; execute browser-less, console-based, javascript + DOM code right from within your Rails test suite.