PostgreSQL supports the SQL OVERLAPS operator. You can use it to test if two date ranges overlap: => SELECT ('2001-02...

Summary: Don't add chromedriver-helper to the Gemfile the executables might break your tests in projects where chromedriver-helper...

If your Angular app has some decent complexity, it will not be easy to use UI Router straight away. Here...

Git has two kind of tags: annotated lightweight Annotated tags are stored as full objects in the Git database. They...

In most projects I know, Cucumber test suite speed is not an issue. Of course, running 350 features takes its...

Sometimes when working with VCR you still want to use webmock. Since VCR hooks into webmock and fails when an...

When you're using Sidekiq::Web to monitor the Sidekiq status AND have your session cookie configured to a wildcard...

If your application exports CSV, be advised that Excel and other spreadsheet applications treat certain cells (those starting with =, +, - or...

Requestb.in is a webservice that gives you a temporary URL you can use to test request. The page will automatically...

When attempting to update RubyGems, depending on updates your previously performed, you might run into an error ERROR: While executing...

We're usually running Ubuntu LTS versions. Sometimes newer hardware requires packages from more recent Ubuntu releases that only come...

A common pattern in Ruby is to to require all files in a specific diretory, using something like Dir.glob(Rails.root.join...

Checking if a JavaScript value is of a given type can be very confusing: There are two operators typeof and...

RSpec allows you to mark a single Example/ExampleGroup so that only this will be run. This is very useful when...

If you already selected an element and want to get its parent, you can call find(:xpath, '..') on it.

If you use awesome and make a Slack call, you'll constantly have an overlay window pop up taking over...

When an Rspec example fails, I usually investigate by running that example again using rspec . However, this does not work...

You are not using javascript tests The file is served from a public folder (not via controller) Problem description...

An end-to-end test (E2E test) is a script that remote-controls a web browser with tools like Selenium...

When your public-facing application has a longer downtime for server maintenance or long migrations, it's nice to setup...

Browsers support different types of redirects. Be very careful with these status codes: 301 Moved Permanently 308 Permanent Redirect

Slides for Henning's talk on Sep 21st 2017. Understanding sync vs. async control flow Talking to synchronous (or "blocking...

If you are using PDFKit / wkhtmltopdf, you might as well want to use custom fonts in your stylesheets. Usually this...