generate-unit-tests

generate-unit-tests is a command for Claude Code from sigistry/marketplace. It costs 18 tokens per session (3,033 once invoked), scanned A, original, MIT.

A command that generates unit tests for individual functions, classes, or modules, including edge cases and realistic input data.

In plain words
What is it for?
Use it to identify testable code and create tests for its inputs, return values, error conditions, and interactions with external services or databases.
Why use it?
It helps cover code that has few or no tests and checks normal results, errors, side effects, and dependencies.

Command for Claude Code

Written for Claude Code: argument-hint in frontmatter. Also seen: model in frontmatter.

Part of the test-generator plugin — 5 commands shipped together

Good fit Use it to identify testable code and create tests for its inputs, return values, error conditions, and interactions with external services or databases.

Compare 6 commands from other repositories ↓
Install with agentmods
npx agentmods add commands/sigistry/marketplace/generate-unit-tests
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Clone the repo
git clone --depth 1 https://github.com/sigistry/marketplace

Made for: Claude Code.

Or install test-generator, the plugin that ships this one along with the rest of its 5 commands.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for generate-unit-tests

README.md
[![agentmods](https://agentmods.dev/badge/commands/sigistry/marketplace/generate-unit-tests/github.svg)](https://agentmods.dev/commands/sigistry/marketplace/generate-unit-tests)
Your own site
<a href="https://agentmods.dev/commands/sigistry/marketplace/generate-unit-tests"><img src="https://agentmods.dev/badge/commands/sigistry/marketplace/generate-unit-tests/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for generate-unit-tests

Your own site · 80×15
<a href="https://agentmods.dev/commands/sigistry/marketplace/generate-unit-tests"><img src="https://agentmods.dev/badge/commands/sigistry/marketplace/generate-unit-tests.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 18 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 3,033 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00018 $0.03033
Opus 5 $0.00009 $0.01517
Sonnet 5 $0.00004 $0.00607
Haiku 4.5 $0.00002 $0.00303

Measured 5d ago against content hash 512c56bf111b, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

generate-unit-tests scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 5d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

plugins/test-generator/commands/generate-unit-tests.md · 490 lines

How it starts

The opening of the file, as written. The whole thing — 490 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Unit Test Generation Command

You are tasked with generating comprehensive, production-quality unit tests for the specified code. Follow these steps precisely to create thorough test coverage:

Step 1: Identify Target Code

If the user provided a file path or function name:

  • Locate and read the specified file(s) or function(s)
  • If a directory is specified, recursively find all testable code files within it
  • Identify all public functions, classes, and methods that need testing

If no specific target is provided:

  • Ask the user which file, function, or class they want tested
  • Provide a list of recently modified files as suggestions
  • Show files with low or no test coverage if available

Step 2: Analyze the Code

For each target function or class, perform thorough analysis:

Function Analysis

  • Purpose: What does this function do?
  • Input Parameters: Types, valid ranges, constraints, optional vs required
  • Return Values: What does it return? What are possible return values?
  • Side Effects: Does it modify state, make API calls, write to DB, etc.?
  • Dependencies: What external modules or services does it depend on?
  • Error Conditions: What errors can it throw? Under what conditions?
  • Edge Cases: Boundary values, null/undefined, empty collections, special characters
  • Business Logic: What business rules does it implement?

Class Analysis

  • Responsibilities: What is this class responsible for?
  • Public Methods: All methods that need testing
  • State Management: How does internal state change?
  • Dependencies: What dependencies are injected or used?
  • Lifecycle: Constructor, initialization, cleanup
  • Inheritance: Parent classes and their behavior

Step 3: Detect Testing Framework

Automatically detect the testing framework from the project:

JavaScript/TypeScript

  • Check package.json for: jest, vitest, mocha, jasmine
  • Default to Jest if not specified
  • Check for existing test files to match their style

Read the full file on GitHub · 490 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 5d ago First seen · 490 lines · 18 tokens per session scan A 512c56bf111b

Subscribe to this mod's changes

generate-unit-tests is a command published in the GitHub repository sigistry/marketplace (3 stars, last pushed 4d ago), licensed MIT. It adds 18 tokens to every session and 3,033 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.