Test automation tutorials, frameworks, and tools — from first scripts to full CI/CD pipelines.
Test Automation
Several tools exist for intercepting and testing emails during development. They all solve the same core problem — capturing outgoing SMTP traffic without delivering it — but differ in features, maintenance status, and hosting model. The Candidates Tool Type Language Last Release License Mailpit Self-hosted Go Active (2024) MIT MailHog Self-
Test Automation
Email testing is one of the most overlooked areas of application quality. Sending real emails during tests is slow, unreliable, and leaks data. The solution is a fake SMTP server that captures outgoing messages so you can assert on them without touching a real inbox. The Core Problem Applications send
Test Automation
Background jobs power the asynchronous side of your application: sending emails, processing uploads, syncing data, sending webhooks. Testing them requires different strategies than testing HTTP handlers — you need to control job scheduling, execution, retries, and failure handling. Testing Levels Unit tests: Test the job's processing logic in isolation.
Test Automation
Audio applications span podcasts, voice messages, music processing, and real-time communication. Testing audio is harder than images because you can't easily "see" the output — you need to assert on metadata, waveform properties, or transcriptions. Testing Audio Format Conversion // services/audio-processor.js import { execFile } from
Test Automation
A/B testing (split testing) lets you run controlled experiments — showing variant A to one group and variant B to another — to measure which performs better. From an engineering perspective, the challenge is not the statistics but the testability: experiments must be deterministic, isolated, and not interfere with your automated
Test Automation
BackstopJS is a visual regression testing tool that compares screenshots of web pages or components across versions. It's particularly useful for component libraries and design systems where you need to verify that changes to shared components don't break visual consistency across many consumers. How BackstopJS Works
Test Automation
Testing effectful Haskell code is where the language's type system earns its reputation. By abstracting over effects — whether through MTL typeclasses or algebraic effect systems like Polysemy — you can run production code with a pure test interpreter. No mocking frameworks, no monkey-patching, just different interpreters for different
Test Automation
Tasty is a composable test framework for Haskell. It doesn't replace HUnit, QuickCheck, or Hedgehog — it organizes them. Tasty provides a TestTree abstraction that lets you mix testing libraries, run tests in parallel, filter by name, and generate multiple output formats from a single test suite. The Core
Test Automation
HSpec is Haskell's most widely used test framework for unit and integration tests. Beyond basic describe/it blocks, it offers hooks, shared context, custom matchers, and tight integration with QuickCheck. This guide covers the patterns that matter for large test suites. Setup and Structure Refresher import Test.Hspec
Test Automation
Spock is a testing and specification framework for Java and Groovy applications. It combines JUnit's test runner compatibility with a highly expressive Groovy-based DSL. The result is tests that read like documentation and fail with clear, informative messages. Why Spock Spock's given/when/then structure
Test Automation
Spock's data-driven testing features turn a single spec into a parameterized test suite with almost no boilerplate. The where block, data tables, and @Unroll annotation work together to produce clear, readable test output for every data combination. The Where Block Add a where block to any feature
Test Automation
Spock's built-in mocking eliminates the need for Mockito or PowerMock in most Groovy/Java projects. The API is concise, the error messages are clear, and the interactions integrate directly with the then block's assertion syntax. The Three Types Spock provides three mock variants with distinct