Add Missing Unit Test

OrganizationPopular

flutter

add-missing-unit-test

Add a new unit test for a class that currently lacks one or add a new test case to an existing test file, verifying improvement with Kover.

Overview

Publisher	flutter
Repository	`flutter-intellij`
Skill name	`add-missing-unit-test`
Stars	2K
Forks	356
Bundled files	Instructions only
License	BSD-3-Clause
Links	Skill source Repository Homepage

Markdown instructions
A SKILL.md file the model loads on demand, so it only costs tokens when a request actually matches.
Works with any LLM
AI skills are plain Markdown, not provider-specific code, so this works with GPT, Claude, Gemini, Grok, or a local model.
Self-contained
Everything the model needs lives in the instructions — no extra files to sync.
Open source
Published by flutter on GitHub. Read the source before you install it.

Installation

Install the Add Missing Unit Test AI skill in TypingMind to use it with any LLM, or drop it into another agent that reads SKILL.md.

Install in TypingMind

TypingMind installs a skill straight from its GitHub folder — it reads SKILL.md, bundles the resource files, and stores the result locally.

Open the app and go to Plugins → Skills.
Choose "Install from GitHub".
Paste the skill folder URL below and confirm.
https://github.com/flutter/flutter-intellij/tree/main/.agents/skills/add-missing-unit-test
Enable the skill in any chat where you want it available.

Store

Installed

Skills

Add skills

Import one or more skills from a public GitHub folder or a local .skill or .zip archive, or SKILL.md file.

From GitHub URLFrom .skill, .zip, or SKILL.md

GitHub repo or folder

https://github.com/flutter/flutter-intellij/tree/main/.agents/skills/add-missing-unit-test

Points to a single skill folder, or any folder that contains multiple skills. Public repos only.

CancelContinue

Plugins → Skills → Add skill → From GitHub URL, then paste the folder URL and press Continue.

Install in another agent

Any agent that reads the Agent Skills format can use this skill — copy the folder into that agent's skills directory.

Claude Code — .claude/skills

git clone --depth 1 https://github.com/flutter/flutter-intellij.git /tmp/flutter-intellij
mkdir -p .claude/skills
cp -r /tmp/flutter-intellij/.agents/skills/add-missing-unit-test .claude/skills/add-missing-unit-test

Restart Claude Code after copying so it picks up the new skill.

Use it in TypingMind

Enable Add Missing Unit Test in any TypingMind chat and the model takes it from there. Its name and description sit in the system prompt, and the moment a request matches, the model loads the full instructions itself — you never invoke it by hand, and it costs no tokens until it is actually used.

The model loads Add Missing Unit Test on its own as soon as a request matches it.

Works with any AI model

AI skills are plain Markdown instructions rather than provider-specific code, so Add Missing Unit Test is not tied to the model it was written for. Install it once in TypingMind and use it with GPT-5, Claude, Gemini, Grok, DeepSeek, Mistral, Llama, or a local model you run yourself — all on your own API keys.

Loaded only when it is needed
The system prompt carries just the name and description. The instructions are fetched on the first matching request, so an idle skill costs nothing.
Switch models mid-chat
Because the skill is instructions rather than code, changing model does not break it — the next model reads the same SKILL.md.

Skill instructions

This is the SKILL.md content the model loads. Read it before installing — a skill is instructions your model will follow.

Skill: Add Missing Unit Test

You are tasked with adding a new unit test for a class that currently lacks one, or adding a new test case to an existing test file, to improve code coverage and reliability.

Objective

Add a new unit test for a class that currently lacks one, or add a new test case to an existing test file, to improve code coverage and reliability.

Workflow Instructions

1. Identify Target

Choose a class in src/ that has complex logic but logic coverage is missing or incomplete.

2. Establish Baseline

Run ./gradlew testClasses to compile all sources (production and test) and ensure the project is in a valid state.
Run ./gradlew verifyPlugin to ensure no plugin verification issues exist.
Run ./gradlew test (or specific test if it exists) to establish current pass/fail status.
Run tests with Kover (./gradlew koverHtmlReport or ./gradlew koverXmlReport) to determine current coverage percentage for target class.

3. Implement Test

Create a new test class ([ClassName]Test) in testSrc/ if it doesn't exist.
Add test cases to cover specific methods, edge cases, and branches.
Ensure the test follows project testing conventions (naming, mocking, assertions).

4. Verify

Run ./gradlew testClasses to ensure new test compiles.
Run new test (and related tests) to ensure it passes.
Run ./gradlew verifyPlugin to ensure no regressions in plugin verification.
Run Kover again to confirm coverage improvement.

5. Report & Review

Summarize test added and coverage improvement.
Test Location: Explicitly state where in the IDE user should go to test changed functionality (e.g., "Run the new test file [TestFileName]").
Action: Ask user to review new test closely. Validate that code being tested is actively used (e.g., check that it is not dead code/0 references).
Do not commit or push.
Provide a suggested Git commit message, explicitly including the Kover coverage improvement:
- Example Pattern: Add unit tests for [Class Name]. Coverage verified using Kover. Coverage improvement: [Class Name]: ~[X]% line coverage ([Y] covered, [Z] uncovered).

Frequently asked questions

What does the Add Missing Unit Test AI skill do?

Add a new unit test for a class that currently lacks one or add a new test case to an existing test file, verifying improvement with Kover.

Why use Add Missing Unit Test on TypingMind?

Because you install it once and use it with any model. Add Missing Unit Test is plain Markdown rather than provider-specific code, so the same skill runs on GPT-5, Claude, Gemini, Grok, or a local model — and you can switch model mid-chat without it breaking. TypingMind runs on your own API keys, so you pay providers directly instead of a per-seat subscription, and your skills and chats stay in your own storage.

How do I install Add Missing Unit Test in TypingMind?

Open Plugins → Skills → Install from GitHub in TypingMind and paste https://github.com/flutter/flutter-intellij/tree/main/.agents/skills/add-missing-unit-test. TypingMind reads its SKILL.md and installs it as a skill you can enable per chat.

Which AI models can use Add Missing Unit Test?

Any model you connect in TypingMind. AI skills are plain Markdown instructions rather than provider-specific code, so GPT, Claude, Gemini, Grok, and local models can all load this skill when a request matches it.

How many AI models can I use with Add Missing Unit Test?

As many as you like. As long as a model supports skills, you can use Add Missing Unit Test with it — GPT, Claude, Gemini, Grok, DeepSeek, Mistral, Llama and more — all on TypingMind with your own API keys.

Is the Add Missing Unit Test AI skill free?

Yes. It is published on GitHub by flutter under the BSD-3-Clause license. You only pay your own AI provider for the tokens you use.

What are AI skills?

An AI skill is a reusable instruction bundle that teaches an AI model how to do one specific task. It follows the open Agent Skills format: a SKILL.md file with a name and description, plus any scripts, templates or reference files the model may need. The model reads the instructions only when your request matches the skill, so an installed skill costs nothing until it is used.

How are AI skills different from plugins or MCP servers?

A plugin or MCP server gives a model new tools to call — code that runs somewhere and returns a result. An AI skill gives the model knowledge and process instead: how to approach a task, which steps to follow, what good output looks like. Skills are plain Markdown, so they need no server, no API key and no runtime, and they work with any model.

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Overview

Installation

Install in TypingMind

Install in another agent

Use it in TypingMind

Works with any AI model

Skill instructions

Skill: Add Missing Unit Test

Objective

Workflow Instructions

1. Identify Target

2. Establish Baseline

3. Implement Test

4. Verify

5. Report & Review

Frequently asked questions

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