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Languages & runtimes · #ruby
Stop duplicating tests for common interfaces. Learn how to use RSpec shared_examples to define behavioral contracts once and enforce them across multiple classes.
Learn how to use RSpec's let and let! helpers to manage test dependencies, avoid state leakage, and optimize test suite performance through memoization.
Learn how to define RSpec shared examples once and reuse them across classes that implement the same interface, with parameterization, file organization, and debugging tips.
Learn how to use RSpec’s tag filtering to run specific tests, skip slow ones, and focus on critical scenarios. The article covers inline tags, derived metadata, focused execution, and best‑practice trade‑offs.
Learn how to eliminate duplicated expectations in RSpec by using shared examples with parameters, see a concrete Money/Weight example, and understand the trade‑offs.
Use Ruby's SizedQueue and a fixed worker pool to cap memory and apply backpressure in producer-consumer pipelines, with explicit error handling and clear boundaries for shared mutable state.
Replace hidden instance-variable dependencies in RSpec before hooks with let and let!. Make setup explicit, lazy where possible, and isolated so failures point to the example.
Ruby Ractors offer actor-style parallelism for CPU-bound work by isolating state and passing messages. Learn the trade-offs and see a minimal working example.
Learn how to define shared_examples in RSpec, parameterize them with block arguments, and apply the same behavior to different object types while keeping your test suite DRY and readable.
rspec