javascript-testing-expert

4.8k

dubzzz

Expert-level JavaScript testing skill focused on writing high-quality tests that find bugs, serve as documentation, and prevent regressions. Advocates for property-based testing with fast-check and protects against indeterministic code in tests. Does not cover black-box e2e testing.

property-based-testing

3.0k

trailofbits

Provides guidance for property-based testing across multiple languages and smart contracts. Use when writing tests, reviewing code with serialization/validation/parsing patterns, designing features, or when property-based testing would provide stronger coverage than example-based tests.

rails-testing

602

etewiah

Help with Rails testing including unit tests, integration tests, fixtures, and debugging test failures. Use when working on tests or debugging test issues.

axiom-swiftdata-migration

538

Charleswiltgen Axiom Axiom Swiftdata Migration

Use when creating SwiftData custom schema migrations with VersionedSchema and SchemaMigrationPlan - property type changes, relationship preservation (one-to-many, many-to-many), the willMigrate/didMigrate limitation, two-stage migration patterns, and testing migrations on real devices

echidna-fuzzer

376

a5c-ai

Property-based testing and fuzzing using Echidna for smart contracts. Includes invariant definition, corpus management, coverage analysis, and CI/CD integration for comprehensive security testing.

testing-strategies

296

ancoleman

Strategic guidance for choosing and implementing testing approaches across the test pyramid. Use when building comprehensive test suites that balance unit, integration, E2E, and contract testing for optimal speed and confidence. Covers multi-language patterns (TypeScript, Python, Go, Rust) and modern best practices including property-based testing, test data management, and CI/CD integration.

property-based-testing

133

ed3dai

Use when writing tests for serialization, validation, normalization, or pure functions - provides property catalog, pattern detection, and library reference for property-based testing

ring:dev-cycle

122

LerianStudio

Main orchestrator for the 10-gate development cycle system. Loads tasks/subtasks from PM team output and executes through implementation → devops → SRE → unit testing → fuzz testing → property testing → integration testing (write) → chaos testing (write) → review → validation gates (Gates 0-9), with state persistence and metrics collection. Gates 6-7 (integration/chaos) write and update test code per unit but only execute tests at end of cycle (deferred execution).

robotics-testing

112

arpitg1304

Testing strategies, patterns, and tools for robotics software. Use this skill when writing unit tests, integration tests, simulation tests, or hardware-in-the-loop tests for robot systems. Trigger whenever the user mentions testing ROS nodes, pytest with ROS, launch_testing, simulation testing, CI/CD for robotics, test fixtures for sensors, mock hardware, deterministic replay, regression testing for robot behaviors, or validating perception/planning/control pipelines. Also covers property-based testing for kinematics, fuzz testing for message handlers, and golden-file testing for trajectories.

testing-patterns

97

yonatangross

Comprehensive testing patterns for unit, integration, E2E, pytest, API mocking (MSW/VCR), test data, property/contract testing, performance, LLM, and accessibility testing. Use when writing tests, setting up test infrastructure, or validating application quality.

property-based-testing

95

aj-geddes

Design property-based tests that verify code properties hold for all inputs using automatic test case generation. Use for property-based, QuickCheck, hypothesis testing, generative testing, and invariant verification.

Rust Testing Patterns

71

PramodDutta

Rust testing with built-in test framework, integration tests, doc tests, property-based testing with proptest, and cargo test configuration.

Property-Based Testing

71

PramodDutta

Property-based testing using hypothesis, fast-check, and QuickCheck to generate random test inputs and verify program invariants automatically.

Python Testing Patterns

71

PramodDutta

Comprehensive Python testing best practices with pytest, covering unit testing, integration testing, mocking, fixtures, property-based testing, and test architecture.

Hypothesis

39

anam-org

Use Hypothesis for property-based testing to automatically generate comprehensive test cases, find edge cases, and write more robust tests with minimal example shrinking. Includes Polars parametric testing integration.

test-architect

29

omer-metin

Testing strategy specialist for test pyramid design, test isolation, property-based testing, and quality gatesUse when "testing, test strategy, unit test, integration test, e2e, property testing, test pyramid, flaky test, test coverage, quality gate, testing, pytest, jest, unit-testing, integration-testing, e2e, property-testing, tdd, quality, ml-memory" mentioned.

python3-test-design

23

Jamie-BitFlight

This skill should be used when the user asks to "design a test strategy", "plan test coverage", "create test architecture", "review test structure", or mentions test planning patterns like TDD, BDD, or property-based testing. Provides guidance for pytest test suite architecture and design decisions.

java-testing-advanced

19

pluginagentmarketplace

Advanced testing — Testcontainers, contract testing, mutation testing, property-based testing

effect-testing

16

front-depiction

Write comprehensive tests using @effect/vitest for Effect code and vitest for pure functions. Use this skill when implementing tests for Effect-based applications, including services, layers, time-dependent effects, error handling, and property-based testing.

dotnet-testing-advanced-tunit-advanced

16

kevintsengtw

Complete guide to advanced TUnit usage. Use when you need to perform data-driven tests, dependency injection, or integration tests with TUnit. Covers MethodDataSource, ClassDataSource, Matrix Tests, and Properties filtering. Includes Retry/Timeout controls, WebApplicationFactory integration, and Testcontainers multi-service orchestration. Keywords: TUnit advanced, MethodDataSource, ClassDataSource, Matrix Tests, MatrixDataSource, MicrosoftDependencyInjectionDataSource, Property, Retry, Timeout, data-driven testing, test filtering, WebApplicationFactory TUnit, multi-container orchestration

dotnet testing — FluentValidation testing

16

kevintsengtw

A specialized skill for testing FluentValidation validators. Use this when you need to create tests for Validator classes, validate business rules, or verify error messages. It covers full usage of FluentValidation.TestHelper, ShouldHaveValidationErrorFor, asynchronous validation, cross-property logic, and more. Keywords: validator, validator testing, fluentvalidation, validation testing, UserValidator, CreateOrderValidator, TestHelper, ShouldHaveValidationErrorFor, ShouldNotHaveValidationErrorFor, TestValidate, TestValidateAsync, validator tests, business rule validation

testing

13

williamzujkowski

Comprehensive testing standards including unit, integration, security, and property-based testing with TDD methodology

python-testing-patterns

11

NickCrew

Python testing patterns and best practices using pytest, mocking, and property-based testing. Use when writing unit tests, integration tests, or implementing test-driven development in Python projects.

python-testing

10

taurgis

Python testing best practices covering pytest, unittest.mock, property-based testing with Hypothesis, fixtures, and mocking patterns

mvx_property_testing

10

multiversx

Using fuzz tests in Rust for invariants.

multiversx-property-testing

10

multiversx

Use property-based testing and fuzzing to find edge cases in smart contract logic. Use when writing comprehensive tests, verifying invariants, or searching for unexpected behavior with random inputs.

hypothesis-testing

10

laurigates

Property-based testing with Hypothesis for discovering edge cases and validating invariants. Use when testing code with many possible inputs, verifying mathematical properties, testing serialization round-trips, or finding edge cases that example-based tests miss.

property-based-testing

10

laurigates

Property-based testing with fast-check (TypeScript/JavaScript) and Hypothesis (Python). Generate test cases automatically, find edge cases, and test mathematical properties. Use when user mentions property-based testing, fast-check, Hypothesis, generating test data, QuickCheck-style testing, or finding edge cases automatically.

testing-patterns

9

lambdamechanic

Testing patterns and standards for this codebase, including async effects, fakes vs mocks, and property-based testing.

fast-check

9

TerminalSkills

Find edge-case bugs with property-based testing using fast-check — generate thousands of random inputs automatically. Use when someone asks to "find edge cases", "fast-check", "property-based testing", "fuzz testing in TypeScript", "generate random test data", "QuickCheck for JavaScript", or "test with random inputs". Covers property definitions, arbitraries, shrinking, model-based testing, and integration with Vitest/Jest.

preferences-algebraic-laws

8

cameronraysmith

Algebraic laws including functor/monad laws and property-based testing strategies. Load when verifying algebraic properties or writing property tests.

testing

7

AbdelStark

Comprehensive testing strategies for Guts including unit tests, integration tests, property-based testing, and fuzzing

property-based-testing

7

plurigrid

Provides guidance for property-based testing across multiple languages and smart contracts. Use when writing tests, reviewing code with serialization/validation/parsing patterns, designing features, or when property-based testing would provide stronger coverage than example-based tests.

accelint-ts-testing

6

gohypergiant

Comprehensive vitest testing guidance for TypeScript projects. Use when (1) Writing new tests with AAA pattern, parameterized tests, or async/await, (2) Reviewing test code for anti-patterns like loose assertions (toBeTruthy), over-mocking, or nested describe blocks, (3) Optimizing slow test suites, (4) Implementing property-based testing with fast-check - especially for encode/decode pairs, roundtrip properties, validators, normalizers, and idempotence checks. Covers test organization, assertions, test doubles hierarchy (fakes/stubs/mocks), async testing, performance patterns, and property-based testing patterns. Trigger keywords on vitest, *.test.ts, describe, it, expect, vi.mock, fast-check, fc.property, roundtrip, idempotence.

bupkis-property-testing

5

boneskull

This skill should be used when the user asks to "write property tests", "add property tests", "create property-based tests", "use @bupkis/property-testing", or mentions "PropertyTestConfig", "fast-check generators", or "property testing for bupkis assertions". Provides guidance for writing property-based tests for bupkis plugin assertions using @bupkis/property-testing and fast-check.

test-blocked-fixture

4

basher83

This is a test fixture with intentional violations for regression testing. It contains <angle brackets> which trigger B5, and has an unexpected frontmatter property which triggers W2.

property-based-test-generator

4

Dexploarer

Generates property-based tests using Hypothesis (Python), fast-check (JavaScript/TypeScript), or QuickCheck (Haskell). Use when user asks to "generate property tests", "create hypothesis tests", "add property-based testing", or "generate fast-check tests".

testing-api-for-mass-assignment-vulnerability

2

mukul975

Tests APIs for mass assignment (auto-binding) vulnerabilities where clients can modify object properties they should not have access to by including additional parameters in API requests. The tester identifies writable endpoints, adds undocumented fields to request bodies (role, isAdmin, price, balance), and checks if the server binds these to the data model without filtering. Part of OWASP API3:2023 Broken Object Property Level Authorization. Activates for requests involving mass assignment testing, parameter binding abuse, auto-binding vulnerability, or API over-posting.

exploiting-excessive-data-exposure-in-api

2

mukul975

Tests APIs for excessive data exposure where endpoints return more data than the client application needs, relying on the frontend to filter sensitive fields. The tester intercepts API responses and analyzes them for leaked PII, internal identifiers, debug information, or sensitive business data that the UI does not display but the API transmits. This maps to OWASP API3:2023 Broken Object Property Level Authorization. Activates for requests involving API data leakage testing, excessive data exposure, response filtering bypass, or API over-fetching.

apple-engineer-superpowers

2

piemonte

Use when writing Swift code for Apple platforms - iOS, macOS, visionOS. Covers Swift 6 concurrency, actors, Sendable, async/await, SwiftUI, MVVM architecture, Metal GPU programming, RealityKit ECS, visionOS scenes, interpolation/animation, advanced collection types, property wrappers, Combine bridging, error handling, testing, and API design patterns.

detecting-broken-object-property-level-authorization

2

mukul975

Detect and test for OWASP API3:2023 Broken Object Property Level Authorization vulnerabilities including excessive data exposure and mass assignment attacks.

Python Testing Patterns

1

KaliBellion

Comprehensive Python testing best practices with pytest, covering unit testing, integration testing, mocking, fixtures, property-based testing, and test architecture.

testing-patterns

1

101mare

pytest patterns, fixtures, mocking, parametrize, and property-based testing. Use when writing tests, improving coverage, or setting up test infrastructure. Recognizes: "testing-patterns", "write tests", "pytest patterns", "how to mock", "test fixtures", "parametrize", "property-based testing", "test organization", "improve coverage", "hypothesis tests"

Rust testing

1

michaelkeevildown

Rust testing — unit tests, integration tests, test organization, mocking, and property-based testing.

axiom-swiftdata-migration

1

megastep

Use when creating SwiftData custom schema migrations with VersionedSchema and SchemaMigrationPlan - property type changes, relationship preservation (one-to-many, many-to-many), the willMigrate/didMigrate limitation, two-stage migration patterns, and testing migrations on real devices

rust-testing

1

GravityZenAI

Unit, property, and fuzz testing strategies for Rust code.

testing-strategy

medy-gribkov

Comprehensive testing expertise across unit, integration, and e2e tests. Covers pytest, Vitest, Jest, Go testing, Playwright, Cypress. Test pyramids, TDD workflow, mocking patterns, coverage targets, property-based testing, snapshot testing, parameterized tests, fixtures, CI integration. Use when writing tests, designing test architecture, improving coverage, or setting up testing infrastructure.

property-test

ERP-CORE-DEV

Generate property-based tests with FsCheck or fast-check