🔧 Tools
Postman Practical Guide: API Testing, Automation, and Team Collaboration
A practical guide to using Postman for API exploration, environment management, collection design, shared test flows, and Newman-based CI checks.
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🧪 Test
Spring Boot Test Slices: @WebMvcTest and @DataJpaTest
A practical guide to Spring Boot test slices from the perspective of test-pyramid design and execution cost. Covers when to use @WebMvcTest, @DataJpaTest, @JsonTest, @RestClientTest, and when @SpringBootTest is the better choice.
🧪 Test
Mock, Stub, and Spy Test Double Design Guide
A practical guide to choosing the right test double. Covers the difference between state verification and interaction verification, the risk of excessive mocking, and how to decide between mocks, stubs, spies, and fakes.
🧪 Test
Practical Vue Testing Library Design Guide
How to test Vue components with Vue Testing Library and Vitest from the user's point of view. Covers rendered output, interactions, async UI, Pinia/Router integration, and how to avoid implementation-heavy tests.
🧪 Test
Practical React Testing Library Design Guide
How to use React Testing Library as a user-centered testing tool. Covers query priority, interaction tests, async UI, provider wrappers, and how to avoid excessive mocking.
🧪 Test
TDD in Practice: Red-Green-Refactor
A practical guide to TDD as a design feedback loop rather than a memorized procedure. Covers the meaning of Red-Green-Refactor, where it works best, where it can be too much, and how to apply it sustainably in real teams.
🧪 Test
Cross-Browser E2E Testing with Playwright
How to use Playwright as a reliable E2E testing platform rather than just a browser automation tool. Covers strategy, configuration, selector rules, mocking, auth-state reuse, and practical ways to reduce flaky tests.
🧪 Test
Cypress E2E Testing Strategy Guide
How to use Cypress as a reliable user-flow validation tool, not just a browser automation script. Covers selector strategy, network control, test data, and ways to reduce flaky tests.
🧪 Test
Writing JavaScript Unit Tests with Jest
A practical guide to Jest that goes beyond syntax. Covers what to unit test, how far mocking should go, and how to keep tests maintainable.
⚙️ Backend
A Guide to Spring Boot Testing Strategy
This guide explains how unit tests, slice tests, and integration tests should be divided in a Spring Boot codebase to balance speed and confidence.