kotlin-testing

Write Kotest unit and integration tests with MockK and Kover coverage.

Updated May 9, 2026
One-click install
npx skills add https://github.com/RambleRainbow/jd --skill kotlin-testing-ramblerainbow
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: kotlin-testing
Source: https://github.com/RambleRainbow/jd/tree/main/.claude/skills/kotlin-testing
Command: npx skills add https://github.com/RambleRainbow/jd --skill kotlin-testing-ramblerainbow

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This Skill removes the friction of writing inconsistent, hard-to-maintain Kotlin tests by providing standardized, idiomatic patterns for TDD, mocking, coroutine testing, and coverage tracking, eliminating guesswork when setting up robust test suites for Kotlin projects.

Core Features & Use Cases

  • TDD Workflow Guidance: Step-by-step RED/GREEN/REFACTOR cycle tailored for Kotlin, with runnable examples for common use cases like validators and service classes.
  • Comprehensive Tooling Patterns: Ready-to-use examples for Kotest spec styles, MockK mocking (including coroutine mocking and argument capture), coroutine/flow testing with runTest, and property-based testing.
  • Coverage & CI Integration: Kover configuration templates and GitHub Actions workflows to enforce 80%+ coverage thresholds and automate test runs. Use case example: If you're building a Kotlin microservice with Ktor, use this Skill to quickly set up testApplication tests for your API routes and mock external payment dependencies with MockK.

Quick Start

Use the kotlin-testing skill to write a full set of Kotest tests for your existing Kotlin data class, including MockK mocks for its dependencies and a Kover coverage check to ensure 80%+ test coverage.

Frequently Asked Questions about kotlin-testing

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

FAQPage Schema
How do I test Kotlin coroutines and asynchronous flows?

Test Kotlin coroutines and asynchronous flows using the runTest API to control virtual time and execution. This Skill provides standardized patterns for verifying flow emissions and suspending function behavior within Kotest specs.

What's the best way to mock suspend functions in Kotlin?

Mock suspend functions in Kotlin using MockK's built-in coroutine support with coEvery and coVerify. This Skill offers ready-to-use examples for mocking dependencies, capturing arguments, and verifying asynchronous interactions.

How do I enforce minimum code coverage thresholds for a Kotlin project?

Enforce minimum code coverage thresholds for a Kotlin project by configuring Kover within your build tool and CI pipeline. This Skill provides Kover templates and GitHub Actions workflows to automate checks and enforce 80%+ coverage.

Does Kotest work with Test-Driven Development workflows?

Kotest works seamlessly with Test-Driven Development workflows by supporting structured spec styles for the RED/GREEN/REFACTOR cycle. This Skill provides step-by-step TDD guidance with runnable Kotlin examples for validators and service classes.

Can I use property-based testing with Kotest?

You can use property-based testing with Kotest to validate code against generated inputs. This Skill includes ready-to-use patterns for implementing property-based tests to ensure robust Kotlin codebase coverage.

How do I set up API route tests for a Ktor microservice?

Set up API route tests for a Ktor microservice using testApplication and MockK to mock external dependencies. This Skill demonstrates how to configure environment tests and isolate external interactions like payment services.