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

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.

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.

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.

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.

Test spies are a form of test double that preserves the normal four-phase unit

Passing long text blocks to Cucumber steps keeps feature files readable while preserving full Markdown content for step definitions.

Routing error in Rails 3.2.22.1 can appear when concerns is passed as an option to resources, producing broken routes and failed controller specs.

Bundler does not auto-require gems, so specs may miss dependencies unless the environment calls Bundler.require; direct dependencies still must be required by the gem itself.

patiently do repeats a block until it passes or times out; reusing outer variable names inside the repeated block can make repeated evaluations fail.

Named Machinist blueprints can reuse another blueprint’s fields, letting variants combine shared defaults without repeating attribute definitions.

RSpec stubs for methods that yield blocks need and_yield instead of and_return; multiple yields can be chained, and return values can be combined.

sslscan reports TLS/SSL cipher support and certificate details for remote hosts, helping identify weak protocols, preferred ciphers, and certificate validity.