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.
git clone --depth 1 https://github.com/prisma/prisma-nextWrote 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/rules/prisma/prisma-next/test-mocking-patterns)<a href="https://agentmods.dev/rules/prisma/prisma-next/test-mocking-patterns"><img src="https://agentmods.dev/badge/rules/prisma/prisma-next/test-mocking-patterns/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/rules/prisma/prisma-next/test-mocking-patterns"><img src="https://agentmods.dev/badge/rules/prisma/prisma-next/test-mocking-patterns.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 | $0.00000 | $0.00214 |
| Opus 5.5 | $0.00000 | $0.00086 |
| Sonnet 5.5 | $0.00000 | $0.00043 |
| Haiku 4.5 | $0.00000 | $0.00021 |
Grade A, and why
test-mocking-patterns 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 1mo 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 test-mocking-patterns — 0 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.
What it actually says
Test Mocking Patterns
Type assertions in tests
Allowed in tests only:
@ts-expect-error(with a short reason)- Double casts (
as unknown as X) for mocks / dynamic proxies
Prefer unknown over any to keep the unsafe boundary explicit.
Mocking class instances
Rule: Don’t spread ({ ...instance }) class instances in tests — you’ll lose prototype methods.
const mocked = Object.create(Object.getPrototypeOf(original));
Object.assign(mocked, original, { verify: mockedVerify });
When a test mock needs a cast
- Keep the mock shape minimal (only fields you need)
- Put the cast at the boundary (return statement), not sprinkled throughout the test
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.
- 1mo ago First seen · 31 lines · 0 tokens per session scan A caa802cc8910
test-mocking-patterns is a cursor rule published in the GitHub repository prisma/prisma-next (412 stars, last pushed 1mo ago), licensed Apache-2.0. It costs nothing until one of its globs matches a file; then it loads 214 tokens. A static security scan graded it A with 0 findings. It is 100% identical to test-mocking-patterns, differing in 0 lines, and is treated as a copy.
Other cursor rules, from other repositories
no-bare-casts
No bare as casts in production TypeScript. Use blindCast (value) from @internal/utils/casts as the auditable escape hatch, castAs (value) for declarative-only assertions, or rewrite to eliminate the cast. as const is exempt. Test files are exempt.
use-ast-factories
Use factory functions for creating AST nodes instead of manual object creation.
test-mocking-patterns
Test-only type assertions and mocking patterns (avoid brittle mocks).
jest-unit-testing-cursorrules-prompt-file
Cursor rules for Jest development with unit testing.
javascript
JavaScript and TypeScript conventions for this ESM monorepo.
development-workflow
Cursor rule "development-workflow" from AxiosLeo/node-koapp, covering development workflow and standards, code quality, linting, testing and development scripts.