display conflicts with a reserved Machinist blueprint name, so a blueprint attribute using that label may fail unexpectedly.

Shared setup adds context to scenarios in a feature and runs before each scenario, after Before hooks.

Release candidate and beta gem versions are treated as pre-releases and are ignored unless explicitly requested; RubyGems converts dash-separated SemVer pre-release tags to dot-separated versions.

Timecop 0.3.4 and earlier can create records with timestamps in the past after Timecop.freeze; upgrading to 0.3.5 avoids the bug.

Custom RSpec matcher for verifying delegated methods in Ruby models, including prefixed delegation like author_name.

Publish npm pre-release versions on a separate tag so stable users do not receive alpha or beta builds by default.

Webrat can submit a page request as POST by passing :post to visit, useful when a path must be tested with form-style submission.

Use rspec -b to print a full backtrace for failing examples and make the origin of an error easier to trace.

Cucumber step definitions can map natural-language destinations to Rails route helpers, including list, new, edit, and record lookup paths.

Consul 0.4.0 adds temporary power switching, support for Ruby collections and arbitrary objects as powers, and drops the ActiveSupport::Memoizable dependency.

WebMock fails on IPv6 URLs because addresses need brackets before the port, causing invalid URI and port parsing errors in CarrierWave and SsrfFilter.

Manipulating PostgreSQL array columns can be awkward: values can be appended, removed, or replaced, with special handling for multi-value substitutions.

Stubbing methods on associated records can fail because belongs_to returns an association proxy, not the target object; stub the caller or the association explicitly.

JOIN-heavy scopes become brittle when callers chain more conditions or associations. Converting them to a simple IN query preserves chaining and avoids unexpected SQL side effects.

RSpec helper specs can leak content_for state between examples, making repeated checks fail. A fresh helper instance avoids stale instance variables.

Interact with forms and buttons in embedded web pages by switching Capybara into an iframe; the same pattern also works for reusable Cucumber steps.

Modern CSS features improve progressive enhancement, visual effects, touch handling, and scroll behavior across browser support levels.

Need a simple way to fake server replies during development when external APIs are unavailable or unreliable.

Cerberus is a lightweight and easy-to-use Continuous Builder software for Ruby. It could be run periodically from a scheduler and check if application tests are broken. In case of failed tests Cerberus sends notification to developers.

It turned out that the test subject didn't know that longdesc even existed before the tester told him about it. Can you blame him?

Rake tasks to run specs and tests in parallel, to use multiple CPUs and speedup test runtime.

Mockito is a mocking framework that tastes really good. It lets you write beautiful tests with clean & simple API. Mockito doesn't give you hangover because the tests are very readable and they produce clean verification errors.

RESTClient is a Java application to test RESTful webservices. It can be used to test variety of HTTP communications.