Practical crash courses for founding a startup, raising funding, and testing ideas before building too much.

Automated cross-browser testing finds layout problems and scripting errors on websites before users do.

Around hooks run only after Background steps, so setup or teardown placed there cannot affect background actions. Use Before and After hooks instead.

Cucumber can use RSpec doubles instead of Mocha; loading the integration in env.rb keeps stubs and mocks available after other After hooks.

Chrome 56+ can drop slashes when fill_in runs through Selenium and Capybara, breaking form input for paths and HTML strings; a JavaScript workaround updates the field directly.

IRB and Rails console sessions can time code execution directly with measure; older versions can use Benchmark.measure for manual timing.

Feature and spec code may need different behavior when Rails env is unavailable. Capybara.current_driver can distinguish Cucumber scenarios from RSpec examples.

Split an enumerable into matching and non-matching groups with Enumerable#partition, returning two arrays and working naturally with destructuring assignment.

rspec_rails with Rails 6.1 can raise WrongScopeError; upgrading the gem to 4.0.1 or later resolves the failure.

Spreewald keeps Cucumber-style web steps available while adding reusable steps for emails, tables and time travel in a Ruby gem.

RSpec’s nested documentation format prints example descriptions while specs run, making warnings and failures visible immediately and giving a quick view of core behavior.

Run only matching Cucumber feature files by searching .feature files for a string and passing the matches to geordi cucumber; similar xargs pipelines work without Geordi.

Run rspec and Cucumber from any project directory with optional spinner support; features are skipped when specs fail.

Chrome/Selenium can miss clicks on barely visible elements when the click target is outside the viewport. A scrollIntoViewIfNeeded patch can work around the issue.

Rails 3 requires rspec and rspec-rails 2, with renamed namespaces, changed requires, and macro extensions that may break during migration.

Run custom setup code before selected RSpec examples using metadata tags instead of Cucumber scenarios.

has_select? can fail with Cucumber, Capybara, and Selenium when the selected option has no value, so driver-specific handling may be needed.

in and of mean different things in CoffeeScript and JavaScript, making property checks and iteration easy to mix up.

Specs can stall for 30+ seconds when SOLR connections are left open and the pool is exhausted. Lowering the old-connection timeout reduces the delay.

VCR can block WebMock stubs because it hooks into WebMock and rejects unknown requests. Temporarily disabling VCR in rspec lets WebMock behave normally.