Agent skill

Maui Unit Testing

by davidortinau in davidortinau/maui-skills

xUnit testing guidance for .NET MAUI apps — ViewModel testing, mocking MAUI services, test project setup, code coverage, and on-device test runners.

MITAuto-check passedMobile

Install Maui Unit Testing

skills CLI

$ npx skills add davidortinau/maui-skills --skill maui-unit-testing -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI

$ gh skill install davidortinau/maui-skills maui-unit-testing --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy

$ git clone --depth 1 https://github.com/davidortinau/maui-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/plugins/maui-skills/skills/maui-unit-testing .claude/skills/maui-unit-testing && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Paste into Claude Code

Install the "maui-unit-testing" agent skill from https://github.com/davidortinau/maui-skills/tree/main/plugins/maui-skills/skills/maui-unit-testing into .claude/skills/maui-unit-testing/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "maui-unit-testing", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/davidortinau/maui-skills/tree/main/plugins/maui-skills/skills/maui-unit-testing

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add davidortinau/maui-skills --skill maui-unit-testing -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install davidortinau/maui-skills maui-unit-testing --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/davidortinau/maui-skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/plugins/maui-skills/skills/maui-unit-testing .agents/skills/maui-unit-testing && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "maui-unit-testing" agent skill from https://github.com/davidortinau/maui-skills/tree/main/plugins/maui-skills/skills/maui-unit-testing into .agents/skills/maui-unit-testing/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "maui-unit-testing", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add davidortinau/maui-skills --skill maui-unit-testing -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install davidortinau/maui-skills maui-unit-testing --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/davidortinau/maui-skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/plugins/maui-skills/skills/maui-unit-testing .cursor/skills/maui-unit-testing && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "maui-unit-testing" agent skill from https://github.com/davidortinau/maui-skills/tree/main/plugins/maui-skills/skills/maui-unit-testing into .cursor/skills/maui-unit-testing/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "maui-unit-testing", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/davidortinau/maui-skills.git --path plugins/maui-skills/skills/maui-unit-testing

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add davidortinau/maui-skills --skill maui-unit-testing -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install davidortinau/maui-skills maui-unit-testing --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/davidortinau/maui-skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/plugins/maui-skills/skills/maui-unit-testing .gemini/skills/maui-unit-testing && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "maui-unit-testing" agent skill from https://github.com/davidortinau/maui-skills/tree/main/plugins/maui-skills/skills/maui-unit-testing into .gemini/skills/maui-unit-testing/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "maui-unit-testing", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install davidortinau/maui-skills maui-unit-testing

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add davidortinau/maui-skills --skill maui-unit-testing -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/davidortinau/maui-skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/plugins/maui-skills/skills/maui-unit-testing .github/skills/maui-unit-testing && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "maui-unit-testing" agent skill from https://github.com/davidortinau/maui-skills/tree/main/plugins/maui-skills/skills/maui-unit-testing into .github/skills/maui-unit-testing/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "maui-unit-testing", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add davidortinau/maui-skills --skill maui-unit-testing -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install davidortinau/maui-skills maui-unit-testing --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/davidortinau/maui-skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/plugins/maui-skills/skills/maui-unit-testing .opencode/skills/maui-unit-testing && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "maui-unit-testing" agent skill from https://github.com/davidortinau/maui-skills/tree/main/plugins/maui-skills/skills/maui-unit-testing into .opencode/skills/maui-unit-testing/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "maui-unit-testing", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: maui-unit-testing
GitHub stars: 174
Token cost: ~1.2k tokens
SKILL.md length: 269 words
Files: 2 (incl. references)
Skills in repo: 41
Repo updated: Jul 6, 2026
First seen: Oct 7, 2026
Licence: MIT

At a glance

xUnit testing guidance for .NET MAUI apps — ViewModel testing, mocking MAUI services, test project setup, code coverage, and on-device test runners.

: unit test MAUI
SKILL.md covers ⚠️ TFM Trap: Don't Use…, ⚠️ OutputType Trap: App…, Common Mistakes and Mocking Strategy for MAUI…, plus 3 more sections
Calls dotnet
ViewModel testing

What it does

Maui Unit Testing is an agent skill from davidortinau/maui-skills. xUnit testing guidance for .NET MAUI apps — ViewModel testing, mocking MAUI services, test project setup, code coverage, and on-device test runners. USE FOR: "unit test MAUI", "xUnit test", "ViewModel testing", "mock MAUI services", "test project setup", "code coverage", "on-device test runner", "test MAUI app", "IServiceProvider mock", "Moq MAUI". DO NOT USE FOR: UI automation testing (use appium-automation), performance profiling (use maui-performance), or dependency injection setup (use…

Its SKILL.md is about 1.2k tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files, including reference files (for example `references/unit-testing-api.md`).

It sits in Mobile, covering Unit testing and Cross-platform mobile apps. The repository describes itself as: .NET MAUI skills for GitHub Copilot and Claude Code. The licence is MIT.

When your agent uses it

: unit test MAUI
ViewModel testing
Mock MAUI services
Test project setup

Example prompts

“unit test MAUI”
“xUnit test”
“ViewModel testing”
“/maui-unit-testing”

What it can do on your machine

Read from SKILL.md and the folder at commit 79bb4bf. It shows what the files ask for, not the result of running them.

Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Shell commands in SKILL.md call:
- dotnet
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Maui Unit Testing loads about 1.2k tokens when it runs, and up to ~2.1k if it reads all its reference files. Until then it costs about 135 tokens; SKILL.md has 269 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~135
When it runs · the whole SKILL.md, loaded when a task matches: ~1.2k
With references · SKILL.md plus every file in references/, read only if the agent opens them: ~2.1k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from davidortinau/maui-skills at commit 79bb4bf, republished under its MIT licence (© davidortinau). 269 words, ~1,153 tokens.

Download SKILL.mdSave it as .claude/skills/maui-unit-testing/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.

name: maui-unit-testing
description: xUnit testing guidance for .NET MAUI apps — ViewModel testing, mocking MAUI services, test project setup, code coverage, and on-device test runners. USE FOR: "unit test MAUI", "xUnit test", "ViewModel testing", "mock MAUI services", "test project setup", "code coverage", "on-device test runner", "test MAUI app", "IServiceProvider mock", "Moq MAUI". DO NOT USE FOR: UI automation testing (use appium-automation), performance profiling (use maui-performance), or dependency injection setup (use maui-dependency-injection).

.NET MAUI Unit Testing — Gotchas & Best Practices

For project templates, xUnit examples, ViewModel test patterns, and CLI commands, see references/unit-testing-api.md.

⚠️ TFM Trap: Don't Use Platform-Specific TFMs

xml

<!-- ❌ xUnit can't run on platform-specific TFMs -->
<TargetFramework>net9.0-ios</TargetFramework>

<!-- ✅ Use plain .NET TFM for desktop test host -->
<TargetFrameworks>net9.0;net10.0</TargetFrameworks>

⚠️ OutputType Trap: App Project as Test Dependency

If your test project references the app project, the app tries to build as Exe for the test TFM — this fails. Add a conditional OutputType:

xml

<!-- ❌ App .csproj without conditional — breaks test builds -->
<OutputType>Exe</OutputType>

<!-- ✅ Library for test TFM, Exe for platform TFMs -->
<PropertyGroup Condition="'$(TargetFramework)' == 'net9.0'">
  <OutputType>Library</OutputType>
</PropertyGroup>
<PropertyGroup Condition="'$(TargetFramework)' != 'net9.0'">
  <OutputType>Exe</OutputType>
</PropertyGroup>

Common Mistakes

❌ Using Static MAUI APIs in ViewModels

ViewModels that directly call static MAUI APIs are untestable:

csharp

// ❌ Untestable — Shell.Current requires a running MAUI app
public async Task GoToDetail(int id)
    => await Shell.Current.GoToAsync($"detail?id={id}");

// ✅ Inject an interface — fully testable
public class MyViewModel(INavigationService nav)
{
    public async Task GoToDetail(int id)
        => await nav.GoToAsync($"detail?id={id}");
}

Static APIs to wrap behind interfaces:

Shell.Current → INavigationService
Application.Current → avoid entirely
SecureStorage.Default → ISecureStorage
Connectivity.Current → IConnectivity

❌ Asserting on UI Bindings Instead of ViewModel State

csharp

// ❌ Testing the binding — fragile, needs a running UI
Assert.Equal("Hello", label.Text);

// ✅ Testing the ViewModel — fast, no platform dependency
Assert.Equal("Hello", viewModel.Title);
Assert.True(viewModel.SaveCommand.CanExecute(null));

Mocking Strategy for MAUI Services

MAUI Service	Mock Strategy
`ISecureStorage`	`Mock<ISecureStorage>` — stub `GetAsync`/`SetAsync`
`IPreferences`	`Mock<IPreferences>` — stub `Get`/`Set`/`Remove`
`IConnectivity`	`Mock<IConnectivity>` — return `NetworkAccess`
`IGeolocation`	`Mock<IGeolocation>` — return fixed `Location`
`IFilePicker`	`Mock<IFilePicker>` — return `FileResult`
`IMediaPicker`	`Mock<IMediaPicker>` — return `FileResult`
Shell navigation	Abstract behind `INavigationService`
`IDispatcher`	Stub `Dispatch` to invoke action synchronously

Architecture: Interface-First for Testability

Define service interfaces so ViewModels have zero MAUI platform dependencies:

csharp

// ✅ These make your entire ViewModel layer testable
public interface INavigationService
{
    Task GoToAsync(string route);
    Task GoBackAsync();
}

public interface IDialogService
{
    Task<bool> ConfirmAsync(string title, string message);
}

Tips

No Application.Current or Shell.Current in ViewModels — wrap in injectable services
Use ObservableCollection<T> and [ObservableProperty] (MVVM Toolkit) for testable state
Assert on ViewModel properties and CanExecute, not UI bindings
Use TaskCompletionSource to test async waiting flows
Run dotnet test in CI to catch regressions early
On-device tests: Use xunit.runner.devices for real platform APIs (sensors, camera, Bluetooth)

Checklist

Test project targets plain net9.0/net10.0 (not platform-specific TFMs)
App project has conditional OutputType for test TFM
All MAUI static APIs wrapped behind injectable interfaces
ViewModels tested via properties and commands, not UI bindings
IDispatcher mocked to invoke synchronously in tests
dotnet test runs green in CI

Files

SKILL.md and 1 other file (references) in plugins/maui-skills/skills/maui-unit-testing of davidortinau/maui-skills.

SKILL.md
references/unit-testing-api.md

Open the folder on GitHubat commit 79bb4bf

Compare with similar skills

Maui Unit Testing next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Maui Unit Testing compared with similar skills
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BlocVeryGoodOpenSource/vgv-ai-flutter-plugin	169	—	~2k	Automated safety check: Pass	MIT	2 days ago
Flutter Testingmakifbaysal/tasktrooper	109	—	~1.3k	Automated safety check: Pass	Apache-2.0	yesterday
Creating Reanimated Animationsgluestack/gluestack-ui	5.3k	—	~2.4k	Automated safety check: Pass	None	1 mo ago
Improve Code Coveragealexvanyo/composelife	267	—	~1.1k	Automated safety check: Pass	Apache-2.0	yesterday

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Questions about Maui Unit Testing

What does Maui Unit Testing do?

xUnit testing guidance for .NET MAUI apps — ViewModel testing, mocking MAUI services, test project setup, code coverage, and on-device test runners. Maui Unit Testing is an agent skill from davidortinau/maui-skills.NET MAUI apps — ViewModel testing, mocking MAUI services, test project setup, code coverage, and on-device test runners.

When should I use Maui Unit Testing?

Maui Unit Testing fits situations like: : unit test MAUI; viewModel testing; mock MAUI services; test project setup.

How do I install Maui Unit Testing in Claude Code?

Run `npx skills add davidortinau/maui-skills --skill maui-unit-testing -a claude-code`. Or copy the skill folder (plugins/maui-skills/skills/maui-unit-testing in davidortinau/maui-skills) into .claude/skills/maui-unit-testing in your project. Claude Code loads it when a task matches its description.

How do I install Maui Unit Testing in Codex?

Run `npx skills add davidortinau/maui-skills --skill maui-unit-testing -a codex`. Or copy the skill folder (plugins/maui-skills/skills/maui-unit-testing in davidortinau/maui-skills) into .agents/skills/maui-unit-testing in your project. Codex loads it when a task matches its description.

Can I use Maui Unit Testing in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add davidortinau/maui-skills --skill maui-unit-testing -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/maui-unit-testing, .gemini/skills/maui-unit-testing, .github/skills/maui-unit-testing and .opencode/skills/maui-unit-testing in your project.

What does Maui Unit Testing need to run?

Going by SKILL.md and its folder, Maui Unit Testing needs the command-line tools its instructions call (dotnet).

Does Maui Unit Testing access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Maui Unit Testing safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Maui Unit Testing use?

Maui Unit Testing is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Maui Unit Testing use?

About 1.2k tokens (SKILL.md is roughly 4.6k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 981 tokens, read only when the agent opens those files.

What are the alternatives to Maui Unit Testing?

Skills that share tags, products or a category with Maui Unit Testing: Flutter Tester (FNOSP/FlyNarwhal, 495 stars), Bloc (VeryGoodOpenSource/vgv-ai-flutter-plugin, 169 stars), Flutter Testing (makifbaysal/tasktrooper, 109 stars) and Creating Reanimated Animations (gluestack/gluestack-ui, 5.3k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Maui Unit Testing?

davidortinau (a GitHub user) maintains it in davidortinau/maui-skills, which has 174 GitHub stars. The repository holds 41 skills in this directory. The repository was last updated on July 6, 2026.

Source: davidortinau/maui-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Install Maui Unit Testing

Facts

At a glance

What it does

When your agent uses it

Example prompts

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

.NET MAUI Unit Testing — Gotchas & Best Practices

⚠️ TFM Trap: Don't Use Platform-Specific TFMs

⚠️ OutputType Trap: App Project as Test Dependency

Common Mistakes

❌ Using Static MAUI APIs in ViewModels

❌ Asserting on UI Bindings Instead of ViewModel State

Mocking Strategy for MAUI Services

Architecture: Interface-First for Testability

Tips

Checklist

Files

Compare with similar skills

Similar skills

More from davidortinau/maui-skills

Related

Questions about Maui Unit Testing