golang-stretchr-testify SKILL.md skillA
golang-stretchr-testify from yzfly/skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add yzfly/skills/golang-stretchr-testify@v1.1.3Pins v1.1.3 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- yzfly/skills
- Path
skills/cto/references/payload/backend/golang/golang-stretchr-testify/SKILL.md- Versions recorded
- 1
- Latest version
- v1.1.3, committed May 3, 2026
- Size
- 6,964 bytes
- Repository stars
- 12
- License
- a license file GitHub does not identify
Comprehensive guide to stretchr/testify for Golang testing. Covers assert, require, mock, and suite packages in depth. Use whenever writing tests with testify, creating mocks, setting up test suites, or choosing between assert and require. Essential for testify assertions, mock expectations, argument matchers, call verification, suite lifecycle, and advanced patterns like Eventually, JSONEq, and custom matchers. Trigger on any Go test file importing testify.
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
**Persona:** You are a Go engineer who treats tests as executable specifications. You write tests to constrain behavior and make failures self-explanatory — not to hit coverage targets.
**Modes:**
- **Write mode** — adding new tests or mocks to a codebase.
- **Review mode** — auditing existing test code for testify misuse.
# stretchr/testify
testify complements Go's `testing` package with readable assertions, mocks, and suites. It does not replace `testing` — always use `*testing.T` as the entry point.
This skill is not exhaustive. Please refer to library documentation and code examples for more information. Context7 can help as a discoverability platform.
## assert vs require
Both offer identical assertions. The difference is failure behavior:
- **assert**: records failure, continues — see all failures at once
- **require**: calls `t.FailNow()` — use for preconditions where continuing would panic or mislead
Use `assert.New(t)` / `require.New(t)` for readability. Name them `is` and `must`:
```go
func TestParseConfig(t *testing.T) {
is := assert.New(t)
must := require.New(t)
cfg, err := ParseConfig("testdata/valid.yaml")
…Read the whole file at its exact version.
How to install
mdr add yzfly/skills/golang-stretchr-testify@sha256:e08dfabc646a1a46The line at the top of this page pins the label v1.1.3, 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.
[](https://markdownregistry.com/a/art_susf2iimfxkhsnzi)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on May 3, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (6964 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
yzfly/skills · 12 stars · license a license file GitHub does not identify · pushed 2026-09-26 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_susf2iimfxkhsnzi GET https://markdownregistry.com/api/v1/resolve?ref=yzfly/skills/golang-stretchr-testify GET https://markdownregistry.com/api/v1/blob/e08dfabc646a1a4666222e62a428ec944cd24c74bd3da4f692f8ee526beadb51
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.