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LudwigAJ
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test-writing

Write Rust unit, integration, async tokio, and mocking tests.

Updated Apr 8, 2026
Search Tags:#testing#rust#mocking#tokio#proptest#unit-tests#integration-tests
One-click install
npx skills add https://github.com/LudwigAJ/swell --skill test-writing-ludwigaj
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: test-writing
Source: https://github.com/LudwigAJ/swell/tree/main/.swell/skills/test-writing
Command: npx skills add https://github.com/LudwigAJ/swell --skill test-writing-ludwigaj

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This Skill removes the guesswork from creating and improving Rust tests, helping you add coverage quickly while keeping assertions focused on behavior.

Core Features & Use Cases

  • Unit Tests: Write targeted tests for individual functions, modules, and core logic.
  • Async Testing: Build reliable asynchronous tests with tokio for code that depends on tasks, I/O, or timing.
  • Integration and Mocking: Validate public APIs, isolate external dependencies with mocks, and cover both success and failure paths.
  • Use Case: If a Rust module is failing in CI or lacks coverage, use this Skill to produce clear, maintainable tests that protect the behavior you care about.

Quick Start

Use the test-writing skill to add comprehensive Rust tests for the attached module, including unit, async, or integration coverage as needed.

Frequently Asked Questions about test-writing

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I write async Rust tests for tokio tasks and I/O operations?▼

Async Rust tests apply tokio test attributes to validate code depending on tasks, I/O, or timing. This ensures reliable execution of concurrent behaviors and validates both happy and error paths.

What's the best way to mock external dependencies in Rust integration tests?▼

Rust integration tests isolate public APIs by mocking external dependencies. This validates both success and failure paths independently, ensuring behavior-focused coverage without relying on live external services.

Can I use proptest to generate property-based tests for my Rust modules?▼

Yes, proptest generates property-based tests for Rust modules by defining automated inputs to satisfy behavior-focused coverage. This catches edge cases across core logic functions while maintaining descriptive test names.

How do I add unit tests for a Rust module that is failing in CI?▼

Adding unit tests for a failing Rust module involves writing targeted tests for individual functions. This includes descriptive test names and happy-path and error-path assertions to protect core behavior.

Does this approach to writing Rust tests work for both unit and integration coverage?▼

Yes, this approach writes comprehensive Rust tests applicable to both unit tests for core logic and integration tests for public APIs. It provides maintainable test structure with clear behavior-focused assertions.

Why do my Rust tests lack maintainability when covering both happy and error paths?▼

Rust tests lack maintainability without clear structure. Applying behavior-focused coverage with descriptive test names and targeted assertions for both happy-path and error-path conditions resolves this and improves clarity.

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