Unicode character class escapes let JavaScript regular expressions match letters, numbers, and symbols beyond ASCII, making password checks work with umlauts and non-Latin digits.

Browser connectivity can be misleading: navigator.onLine often stays true without usable internet. A real fetch with timeout can confirm whether requests actually work.

Reloading a GET page in Cucumber can preserve query parameters during feature tests. Capybara and Webrat variants use the current request data to revisit the same URL.

Katapult 0.3.0 adds Rails 5.1.4 and Ruby 2.5.0 support, a new Bootstrap-based design, Webpacker, and workflow and test improvements.

GitHub Actions CI template for Rails apps with parallel RSpec, RuboCop, ESLint, license checks, security scanning, and merged coverage reports.

jQuery creates a new wrapper on each $(...) call, so == fails for matching selections. Use .is() to test whether two jQuery objects wrap the same DOM elements.

CarrierWave RSpec matchers simplify testing uploaded image versions and dimensions with have_dimensions, be_no_wider_than, and be_no_larger_than.

Test-only routes can help verify redirects and other edge cases without changing the normal route set. with_routing replaces existing routes, so evaluating a route block keeps both sets available.

Checks whether a form dropdown has a preselected value in HTML using Cucumber step definitions for Capybara or Webrat.

Browser compatibility testing for older Internet Explorer and Edge versions can be done with Microsoft virtual machines or paid cloud access from BrowserStack.

VCR can stub remote API calls in tests while still letting you inspect what was sent, including request payloads, through WebMock.

Helpers for inspecting and manipulating Capybara browser cookies in integration tests, with support for rack-test and Selenium WebDriver.

Run ActiveRecord without Rails in a tiny Ruby script to reproduce bugs or test associations with an in-memory SQLite database.

Geordi 0.16+ lets selenium tests use a project-specific Firefox version via .firefox-version, with geordi cucumber prompting installation of the chosen release.

Capybara step for checking an image by matching part of its src against a filename and extension during browser tests.

File uploads in Rails are easy to misconfigure, causing lost files, public exposure of confidential data, and environment collisions. Existing uploads also need migration when storage paths change.

Install gem and plugin

sudo gem install parallel
script/plugin install git://github.com/grosser/parallel_tests.git

Adapt config/database.yml

test:
  database: xxx_test<%= ENV['TEST_ENV_NUMBER'] %>

Create test databases

script/dbconsole -p
CREATE DATABASE `xxx_test2`;
...

Generate RSpec files

script/generate rspec

(you'll probably only let it overwrite files in script/)

Prepare test databases...

Google Chrome can inherit a non-English browser language from the Linux locale, which affects sites and Selenium tests. Keeping only en locale files forces Chrome to use English.

Timing issues can cause undefined errors when interacting with CKEditor in Cucumber tests. Waiting for the editor to reach ready avoids flaky WYSIWYG input steps.

Capybara within scopes only the first matching element, so tests that need all matches use “inside any” Cucumber steps instead.

git bisect run automates regression hunting by repeatedly testing revisions and narrowing down the first bad commit from a command’s exit status.

Capybara visibility checks can assert whether a form field is shown or hidden by label, using CSS- or JavaScript-based detection.

Check whether an object can perform a state transition before calling it. can_transition_ab? only verifies that a matching transition exists; validations may still block it.

Absolute URLs in Rails tests can be treated as external because the host is unknown, breaking redirect handling in Webrat. Use path-only matching or reset Webrat to the local site.