pester-cli-testing SKILL.md skillA

pester-cli-testing from testland/qa is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned

mdr add testland/qa/pester-cli-testing@git:20260728.1bce424

Pins git:20260728.1bce424 in mdr.lock. Pin the fingerprint instead.

Audit grade: A, 17 of 17 checks passed
Kind: SKILL.md skill
Repository: testland/qa
Path: plugins/qa-cli-tools/skills/pester-cli-testing/SKILL.md
Versions recorded: 4
Latest version: git:20260728.1bce424, committed Jul 28, 2026
First version recorded: Jun 4, 2026
Size: 11,357 bytes
Repository stars: 11
License: MIT

Configures Pester v5 for testing PowerShell CLIs, scripts, and cmdlets - Describe/Context/It blocks, Should assertions, Mock for isolating external dependencies, BeforeAll/BeforeEach setup hooks, Invoke-Pester with PesterConfiguration for tags, code coverage, and NUnit/JUnit XML output in CI. Use when the unit-under-test is a PowerShell script, function, or CLI tool invoked from pwsh on Windows or cross-platform.

Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.

What the file says

# pester-cli-testing

## Overview

[pi]: https://pester.dev/docs/introduction/installation

Per [pester-install][pi], Pester is the standard PowerShell test framework for
unit, integration, and acceptance testing of scripts, functions, modules, and
CLI tools invoked from `pwsh`. It supports Windows PowerShell 3.0 - 5.1 and
PowerShell 6.0.4+ across Windows, Linux, and macOS. When the unit-under-test
is a shell script or binary on Linux/macOS, use `bats-testing` instead; Pester
is the correct choice whenever the subject or test is PowerShell.

## Step 1 - Install

Per [pester-install][pi], Windows 10 / Server 2016+ ship with Pester 3.4.0
built-in. The bundled version cannot be updated via `Update-Module` alone
because its publisher certificate differs from the community-signed Gallery
version. Install Pester v5 side-by-side:

```powershell
# Windows (5.1 or pwsh 7+): -Force enables side-by-side; -SkipPublisherCheck
# accepts the newer certificate
Install-Module -Name Pester -Force -SkipPublisherCheck

# Linux / macOS (pwsh 7+): no bundled version to conflict with
Install-Module -Name Pester

# Verify
Import-Module Pester -PassThru
```

## Step 2 - First test file
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint

mdr add testland/qa/pester-cli-testing@sha256:d1ce7352d3bab942

The line at the top of this page pins the label git:20260728.1bce424, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.

Badge

[![mdr](https://markdownregistry.com/badge/art_cetsr3cuxpm2c5pl.svg)](https://markdownregistry.com/a/art_cetsr3cuxpm2c5pl)

1 badge image fetches in 30 days. What the badge shows.

Versions

The registry has recorded 4 versions of this file, between Jun 4, 2026 and Jul 28, 2026, about one every 18 days.

version	committed	commit	size	audit
git:20260728.1bce424 latest	2026-07-28	1bce424	11,357 B	A	view · diff
git:20260724.d4db756	2026-07-24	d4db756	13,257 B	A	view · diff
git:20260706.4e1409c	2026-07-06	4e1409c	13,323 B	A	view · diff
git:20260604.1250cd5	2026-06-04	1250cd5	13,340 B	A	view

Audit of the latest version

A 17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.

pass: Frontmatter block present
pass: Frontmatter declares a name
pass: Frontmatter declares a description
pass: Size between 200 bytes and 200 KB (11357 bytes)
pass: No zero-width or bidi control characters
pass: No instruction hidden inside an HTML comment
pass: No link to an exfiltration or paste host
pass: No credential-shaped string
pass: No instruction to send local credentials anywhere
pass: No text hidden with inline styles
pass: No prompt-injection phrasing
pass: No curl or wget piped into a shell
pass: No recursive delete of root, home or parent
pass: No instruction to read or print local credentials
pass: No base64 blob over 200 characters
pass: No link to a raw IP address
pass: No script tag

Source

GitHub

testland/qa · 11 stars · license MIT · pushed 2026-10-20 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_cetsr3cuxpm2c5pl
GET https://markdownregistry.com/api/v1/resolve?ref=testland/qa/pester-cli-testing
GET https://markdownregistry.com/api/v1/blob/d1ce7352d3bab942198d423d92710b5f6ddf658c410305e6df425ad92382cbe5

Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.

Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.

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