Use a separate Chrome build for Selenium tests by pointing Selenium::WebDriver::Chrome.path at a binary from an environment variable, while keeping your normal browser untouched.

Clear MySQL data without dropping tables, useful after bad migrations or frozen tests. DatabaseCleaner truncation keeps the schema intact and can be wrapped in a Rake task.

Firefox 5.0.1 no longer runs on Ubuntu 14.04, so Selenium test setups need browser and gem updates to keep Rails 2.3 and Cucumber projects working.

jasmine.clock() lets tests fast-forward timers and trigger setTimeout or setInterval callbacks without waiting in real time.

Shared behavior in traits or modules can be tested once with RSpec shared example groups instead of duplicating specs for each class.

Capybara 2.0 breaks compatibility with 1.x and drops Ruby 1.8 support. It changes Rails integration test conventions, element matching, and RSpec syntax.

Control time in Jasmine tests with the built-in jasmine.clock() to fake timers and new Date() without adding SinonJS.

&:test works for private methods in Ruby 1.8 but raises NoMethodError in Ruby 1.9 and 2.0.

Claude Code can isolate shell commands from your files and network, reducing permission prompts and limiting damage from mistakes while still requiring careful trust.

SearchableTrait was extracted into the Dusen gem, adding tests, documentation, and a cleaner query syntax for Googlesque searches in models.

Firefox regression can break Selenium tests after an upgrade; running an older browser is unsupported and may leave the system unstable.

prepend makes Ruby monkey patches cleaner by inserting an extension before the original implementation, so super still reaches it and ancestor chains stay readable.

Test XPath queries directly in the browser console to inspect page elements without extra tools; Safari, Chrome, and Firefox support this in different ways.

Enable Sentry reporting in development to verify setup changes, using Raven and temporary test messages while avoiding committed debugging noise.

Geordi 1.5.1 adds smarter command handling for test selection, stage lookup, server ports, and LAN access, plus a firefox --setup version check fix.

openssl s_client can verify whether a server supports Perfect Forward Secrecy by checking if a cipher handshake succeeds or fails.

Migrating an existing cucumber test suite to Spreewald reduces custom step definitions by replacing web, email, shared, and table steps with built-in support.

VCR can complain when webdrivers checks the internet for driver updates during tests. Updating locally, ignoring the update host, or pinning the driver version avoids the noise.

Manually verify outbound e-mail delivery from a machine with mail from the shell, either empty or with a typed message body.

Duplicating a gem in both runtime and development dependencies breaks gemspec validation and can make Bundler ignore the package. Put test-only version pins in the Gemfile instead.

Hidden X displays can be inspected by taking a screenshot of the active display, including Xvfb-backed sessions used for headless tests.

SitePrism adds a semantic Page Object Model DSL for Capybara acceptance tests, making site interfaces easier to model and query with reusable page and section objects.