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Agent skill

Testing Guide

by fullstackhero in fullstackhero/dotnet-starter-kit

Write tests for an FSH feature — xUnit + Shouldly + NSubstitute + AutoFixture, with naming and AAA conventions.

MITAuto-check passedTesting & QA

Install Testing Guide

skills CLI
$ npx skills add fullstackhero/dotnet-starter-kit --skill testing-guide -a claude-code

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

GitHub CLI
$ gh skill install fullstackhero/dotnet-starter-kit testing-guide --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/fullstackhero/dotnet-starter-kit.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/testing-guide .claude/skills/testing-guide && 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/

Facts

Skill name
testing-guide
GitHub stars
6.8k
Token cost
~935 tokens
SKILL.md length
158 words
Files
1
Skills in repo
11
Repo updated
First seen
Licence
MIT

At a glance

Write tests for an FSH feature — xUnit + Shouldly + NSubstitute + AutoFixture, with naming and AAA conventions.

  • Adding unit/handler/validator/entity tests
  • SKILL.md covers Conventions, Handler test, Validator test and Entity / domain test (no mocks), plus 3 more sections
  • Calls dotnet
  • Tasks that involve Integration testing

What it does

Testing Guide is an agent skill from fullstackhero/dotnet-starter-kit. Write tests for an FSH feature — xUnit + Shouldly + NSubstitute + AutoFixture, with naming and AAA conventions. Use when adding unit/handler/validator/entity tests. Full rules in .agents/rules/testing.md + integration-testing.md.

Its SKILL.md is about 940 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Testing & QA, covering Integration testing, Unit testing and Test generation. It works with Docker. The repository describes itself as: Production Grade Cloud-Ready .NET 10 Starter Kit (Web API + React Client) with Multitenancy Support, and Clean/Modular Architecture that saves roughly 200+ Development Hours! All… The licence is MIT.

When your agent uses it

  • Adding unit/handler/validator/entity tests
  • Tasks that involve Integration testing
  • Tasks that involve Unit testing

Example prompts

  • “/testing-guide”

Requirements

  • Docker

What it can do on your machine

Read from SKILL.md and the folder at commit 0bd98e3. 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

Testing Guide loads about 935 tokens when it runs. Until then it costs about 61 tokens; SKILL.md has 158 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~61
When it runs · the whole SKILL.md, loaded when a task matches
~935

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 fullstackhero/dotnet-starter-kit at commit 0bd98e3, republished under its MIT licence (© fullstackhero). 158 words, ~935 tokens.

Download SKILL.mdSave it as .claude/skills/testing-guide/SKILL.md (or your agent's skills folder).
name
testing-guide
description
Write tests for an FSH feature — xUnit + Shouldly + NSubstitute + AutoFixture, with naming and AAA conventions. Use when adding unit/handler/validator/entity tests. Full rules in .agents/rules/testing.md + integration-testing.md.

Testing Guide

Stack: xUnit + Shouldly (.ShouldBe) + NSubstitute (Substitute.For<>) + AutoFixture (new Fixture()). Not Moq, not FluentAssertions. Detailed conventions + integration-test gotchas live in .agents/rules/testing.md and .agents/rules/integration-testing.md.

Conventions

  • Test class: public sealed class {Sut}Tests; SUT field named _sut.
  • Method name: MethodName_Should_ExpectedBehavior[_When_Condition].
  • Arrange-Act-Assert with // Arrange / // Act / // Assert; group with #region (Happy Path / Guards / Edge Cases).
  • Mocks via Substitute.For<IService>(); assert calls with .Received(1).X(arg, Arg.Any<CancellationToken>()).
  • When asserting a forwarded CancellationToken, assert the specific token, not the default (NSubstitute fills optional params with default).

Handler test

csharp
public sealed class Create{Entity}CommandHandlerTests
{
    private readonly {X}DbContext _db;            // or Substitute.For<IService>() for service deps
    private readonly Create{Entity}CommandHandler _sut;
    private readonly IFixture _fixture = new Fixture();

    public Create{Entity}CommandHandlerTests()
    {
        _db = /* in-memory or test DbContext */;
        _sut = new Create{Entity}CommandHandler(_db);
    }

    [Fact]
    public async Task Handle_Should_PersistEntity_And_ReturnId()
    {
        // Arrange
        var command = new Create{Entity}Command(_fixture.Create<string>(), 9.99m, "USD");

        // Act
        var id = await _sut.Handle(command, CancellationToken.None);

        // Assert
        id.ShouldNotBe(Guid.Empty);
    }
}

Service-dependency example (NSubstitute):

csharp
_userService = Substitute.For<IUserService>();
// Act … then:
await _userService.Received(1).ToggleStatusAsync(true, command.UserId, Arg.Any<CancellationToken>());

Validator test

csharp
public sealed class Create{Entity}CommandValidatorTests
{
    private readonly Create{Entity}CommandValidator _sut = new();

    [Theory]
    [InlineData("")]
    public void Validate_Should_Fail_When_NameInvalid(string name)
    {
        var result = _sut.Validate(new Create{Entity}Command(name, 1m, "USD"));
        result.IsValid.ShouldBeFalse();
        result.Errors.ShouldContain(e => e.PropertyName == nameof(Create{Entity}Command.Name));
    }
}

Entity / domain test (no mocks)

csharp
[Fact]
public void Create_Should_RaiseCreatedEvent()
{
    var entity = {Entity}.Create("Test", Money.Zero());
    entity.Id.ShouldNotBe(Guid.Empty);
    entity.DomainEvents.ShouldContain(e => e is {Entity}CreatedDomainEvent);
}

Architecture tests (guardrails — keep green)

Architecture.Tests (NetArchTest) enforce: module boundaries (cross-module refs only via .Contracts), tenant-isolation rules, handlers sealed, and every command/paginated-query handler has a validator. Don't weaken these to make a change pass — fix the code.

Integration tests

Integration.Tests runs over real Postgres/Redis/RustFS via Testcontainers — Docker required. Set the Finbuckle tenant context inline, rewire IStorageService post-registration for RustFS (S3), force long-polling for SignalR. All detailed in .agents/rules/integration-testing.md.

Run

bash
dotnet test src/Tests/{X}.Tests
dotnet test src/Tests/Architecture.Tests
dotnet test src/FSH.Starter.slnx --collect "XPlat Code Coverage" --settings coverage.runsettings

© fullstackhero, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in .agents/skills/testing-guide of fullstackhero/dotnet-starter-kit.

Open the folder on GitHubat commit 0bd98e3

Compare with similar skills

Testing Guide 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.

Testing Guide compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Testing Guide this skillfullstackhero/dotnet-starter-kit6.8k—~935Automated safety check: PassMIT
OpenROAD Module Test AdderThe-OpenROAD-Project/OpenROAD3.2k—~1.8kAutomated safety check: PassBSD-3-Clause
Write Testsgrafana/synthetic-monitoring-app171—~1.2kAutomated safety check: PassAGPL-3.0
Running TestsNangoHQ/nango13k—~876Automated safety check: PassCustom licence
NIC Testing Patternsnginx/kubernetes-ingress5.1k—~2.8kAutomated safety check: PassApache-2.0
Write Test389ds/389-ds-base294—~1.8kAutomated safety check: PassCustom licence

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All 11 skills in this repo

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  • Add Feature

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  • Add Full Slice

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  • Add Integration Event

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  • Add Module

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  • Add Permission

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Works with

Categories

Questions about Testing Guide

What does Testing Guide do?

Write tests for an FSH feature — xUnit + Shouldly + NSubstitute + AutoFixture, with naming and AAA conventions. Testing Guide is an agent skill from fullstackhero/dotnet-starter-kit. Write tests for an FSH feature — xUnit + Shouldly + NSubstitute + AutoFixture, with naming and AAA conventions.

When should I use Testing Guide?

Testing Guide fits situations like: adding unit/handler/validator/entity tests; tasks that involve Integration testing; tasks that involve Unit testing.

How do I install Testing Guide in Claude Code?

Run `npx skills add fullstackhero/dotnet-starter-kit --skill testing-guide -a claude-code`. Or copy the skill folder (.agents/skills/testing-guide in fullstackhero/dotnet-starter-kit) into .claude/skills/testing-guide in your project. Claude Code loads it when a task matches its description.

How do I install Testing Guide in Codex?

Run `npx skills add fullstackhero/dotnet-starter-kit --skill testing-guide -a codex`. Or copy the skill folder (.agents/skills/testing-guide in fullstackhero/dotnet-starter-kit) into .agents/skills/testing-guide in your project. Codex loads it when a task matches its description.

Can I use Testing Guide 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 fullstackhero/dotnet-starter-kit --skill testing-guide -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/testing-guide, .gemini/skills/testing-guide, .github/skills/testing-guide and .opencode/skills/testing-guide in your project.

What does Testing Guide need to run?

Going by SKILL.md and its folder, Testing Guide needs the command-line tools its instructions call (dotnet). Our summary lists: Docker.

Does Testing Guide 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 Testing Guide 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 Testing Guide use?

Testing Guide 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 Testing Guide use?

About 935 tokens (SKILL.md is roughly 3.7k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Testing Guide?

Skills that share tags, products or a category with Testing Guide: OpenROAD Module Test Adder (The-OpenROAD-Project/OpenROAD, 3.2k stars), Write Tests (grafana/synthetic-monitoring-app, 171 stars), Running Tests (NangoHQ/nango, 13k stars) and NIC Testing Patterns (nginx/kubernetes-ingress, 5.1k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Testing Guide?

fullstackhero (a GitHub organization) maintains it in fullstackhero/dotnet-starter-kit, which has 6,811 GitHub stars. The repository holds 11 skills in this directory. The repository was last updated on September 30, 2026.

Source: fullstackhero/dotnet-starter-kit on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.