Borrowing it
Nothing to install: this file belongs to braswelljr/rmx. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/braswelljr/rmx/main/.agents/skills/golang-testing/SKILL.mdgit clone --depth 1 https://github.com/braswelljr/rmxWrote 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.
[](https://agentmods.dev/skills/braswelljr/rmx/golang-testing)<a href="https://agentmods.dev/skills/braswelljr/rmx/golang-testing"><img src="https://agentmods.dev/badge/skills/braswelljr/rmx/golang-testing/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.
<a href="https://agentmods.dev/skills/braswelljr/rmx/golang-testing"><img src="https://agentmods.dev/badge/skills/braswelljr/rmx/golang-testing.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00115 | $0.03447 |
| Opus 5 | $0.00057 | $0.01724 |
| Sonnet 5 | $0.00023 | $0.00689 |
| Haiku 4.5 | $0.00012 | $0.00345 |
Grade A, and why
golang-testing 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 8d 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.
This is a copy
100% identical to golang-testing — 6 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 429 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Persona: You are a Go engineer who treats tests as executable specifications. You write tests to constrain behavior, not to hit coverage targets.
Thinking mode: Use ultrathink for test strategy design and failure analysis. Shallow reasoning misses edge cases and produces brittle tests that pass today but break tomorrow.
Modes:
- Write mode — generating new tests for existing or new code. Work sequentially through the code under test; use
goteststo scaffold table-driven tests, then enrich with edge cases and error paths. - Review mode — reviewing a PR's test changes. Focus on the diff: check coverage of new behaviour, assertion quality, table-driven structure, and absence of flakiness patterns. Sequential.
- Audit mode — auditing an existing test suite for gaps, flakiness, or bad patterns (order-dependent tests, missing
t.Parallel(), implementation-detail coupling). Launch up to 3 parallel sub-agents split by concern: (1) unit test quality and coverage gaps, (2) integration test isolation and build tags, (3) goroutine leaks and race conditions. - Debug mode — a test is failing or flaky. Work sequentially: reproduce reliably, isolate the failing assertion, trace the root cause in production code or test setup.
Community default. A company skill that explicitly supersedes
samber/cc-skills-golang@golang-testingskill takes precedence.
Dependencies:
- gotests:
go install github.com/cweill/gotests/gotests@latest
Go Testing Best Practices
This skill guides the creation of production-ready tests for Go applications. Follow these principles to write maintainable, fast, and reliable tests.
Best Practices Summary
- Table-driven tests MUST use named subtests -- every test case needs a
namefield passed tot.Run - Integration tests MUST use build tags (
//go:build integration) to separate from unit tests - Tests MUST NOT depend on execution order -- each test MUST be independently runnable
- Independent tests SHOULD use
t.Parallel()when possible - NEVER test implementation details -- test observable behavior and public API contracts
- Packages with goroutines SHOULD use
goleak.VerifyTestMaininTestMainto detect goroutine leaks - Use testify as helpers, not a replacement for standard library
- Mock interfaces, not concrete types
- Keep unit tests fast (< 1ms), use build tags for integration tests
- Run tests with race detection in CI
- Include examples as executable documentation
What ships with it
5 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 8d ago First seen · 429 lines · 115 tokens per session scan A c49ca69d2e29
golang-testing is a skill published in the GitHub repository braswelljr/rmx (5 stars, last pushed 19d ago), licensed MIT. It adds 115 tokens to every session and 3,447 once invoked, about $0.0006 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to golang-testing, differing in 6 lines, and is treated as a copy.
Other skills, from other repositories
swift-testing-pro
Writes, reviews, and improves Swift Testing code using modern APIs and best practices. Use when reading, writing, or reviewing projects that use Swift Testing.
golang-testing
Production-ready Golang tests — table-driven tests, testify suites and mocks, parallel tests, fuzzing, fixtures, goroutine leak detection with goleak, snapshot testing, code coverage, integration tests, idiomatic test naming. Use when writing or reviewing Go tests, choosing a testing approach, setting up Go test CI…
golang-stretchr-testify
Comprehensive guide to stretchr/testify for Golang testing. Covers assert, require, mock, and suite packages in depth. Use when writing tests with testify, creating mocks, setting up test suites, or choosing between assert and require. Covers testify assertions, mock expectations, argument matchers, call verification…
setup
Wire Ginkgo into a Go package — install the ginkgo CLI and Ginkgo+Gomega, ginkgo bootstrap to generate the suitetest.go (TestXxx/RegisterFailHandler(Fail)/RunSpecs), the package xxxtest convention, dot-import alternatives (aliased import, dsl/ subpackages, --nodot), ginkgo generate, and testing.T interop via…
assertions
Write correct synchronous Gomega assertions — Expect/Ω notation, the To/NotTo/ToNot/Should/ShouldNot equivalences, the multi-return error idiom, Succeed vs HaveOccurred, the .Error() chaining form, annotating assertions (format-string and func()string), tuning failure output via the format subpackage…
gstruct
Deep, partial matching of nested structs, slices, maps, and pointers with gstruct — MatchAllFields/MatchFields/Fields, MatchAllElements/MatchElements/Elements (idFn), MatchAllKeys/MatchKeys/Keys, PointTo, and the IgnoreExtras/IgnoreMissing/IgnoreUnexportedExtras/AllowDuplicates options, plus Ignore()/Reject(). Use…