Demonstrate Effect-TS testing patterns with Vitest for deterministic unit tests.
npx skills add https://github.com/twlines/maslow --skill effect-testing-twlines
Please help me install this Agent Skill. Skill: effect-testing Source: https://github.com/twlines/maslow/tree/main/skills/effect-testing Command: npx skills add https://github.com/twlines/maslow --skill effect-testing-twlines
This Skill provides clear, actionable patterns and best practices for writing effective tests for Effect-TS applications, ensuring robust and maintainable code.
Layer.succeed.Use the effect-testing skill to learn how to mock services with Layer.succeed.
High-intent search queries and answers about installing and using this skill.
To mock services in Effect-TS using Vitest, you can use the `Layer.succeed` method to create deterministic test layers that replace real dependencies with fixed implementations for unit testing.
Composing multiple test layers in Effect-TS involves combining individual mocked layers to build a comprehensive test environment, ensuring your unit tests accurately reflect service behaviors and handle errors gracefully.
Vitest works with Effect-TS by allowing you to test for expected error conditions within a deterministic environment, verifying that your Effect-TS services handle potential errors gracefully during execution.
Effect-TS testing patterns with Vitest adhere to rules for fast, reliable tests within a 10-second timeout, ensuring that your unit tests execute quickly and deterministically without hanging.
You need to use `Layer.succeed` for Effect-TS unit tests when you want to mock service dependencies, allowing you to isolate the service under test and ensure reliable, deterministic results.
twlinesScaffold Vitest unit tests with v8 coverage for TypeScript projects.
cffrankParse Vitest JSON output to generate test quality metrics and reports.
dallenpyrahGenerate Effect-TS code for services, layers, and error handling.
PaulJPhilpProvides reusable testing patterns for Effect-TS programs including unit, streaming, concurrency, and property-based tests.