Get a full fake REST API with zero coding in less than 30 seconds (seriously)
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MockServer is an HTTP(S) mock server and proxy for testing that lets you mock APIs, inspect and modify live traffic, and inject failures. It supports HTTP/1.1, HTTP/2, gRPC, WebSockets, TCP and more on a single port, with additional support for HTTP/3, message brokers, and AI/LLM APIs.
- mock-server
- proxy
- java-client
- javascript-client
A gem providing "time travel", "time freezing", and "time acceleration" capabilities, making it simple to test time-dependent code. It provides a unified method to mock Time.now, Date.today, and DateTime.now in a single call.
Papercut SMTP -- The Simple Desktop Email Server
🔮 Proxies nodejs require in order to allow overriding dependencies during testing.
🎲 Mock or extend your GraphQL API with faked data. No coding required.
Get a full fake GraphQL API with zero coding in less than 30 seconds.
- graphql
- graphql-server
- express-graphql
JVM version of Pact. Enables consumer driven contract testing, providing a mock service and DSL for the consumer project, and interaction playback and verification for the service provider project.
- pact
- consumer-driven-contracts
- contract-testing
- hacktoberfest
Replace any .NET method (including static and non-virtual) with a delegate
- testing
- testing-framework
- isolation-framework
- dotnet
HTTP request/response recording library for elixir, inspired by VCR.
Fake server, Consumer Driven Contracts and help with testing performance from one configuration file with zero system dependencies and no coding whatsoever
In-page HTTP controller for frontend development. Intercept, modify, and simulate API responses directly in the browser.
Shift-left API Integration | Auto-fix integration drift before integration. Specmatic turns API specifications into executable contracts, continuously verifying that every change made by AI coding agents and engineers stays true to the desired behaviour. Ship AI-ready APIs 10x faster, from intent to implementation, with Spec-Driven API Development.
- contract-testing
- microservices
- contract-driven-development
- cdd
A mock for PrismaClient, dedicated to unit testing.
- prisma
- testing
- typescript
- unit-testing
:dash: Simple yet powerful file-based mock server with recording abilities
Java binding for Hoverfly
- api-simulation
- service-virtualization
- java
- testing
netDumbster is a .Net Fake SMTP Server clone of the popular Dumbster
- c-sharp
- unit-testing
- smtp
- smtp-server
Unobtrusive Dependency Injector for Elixir
- elixir
- di
- dependency-injection
- unobtrusive
Mocking functions. Please get in touch to discuss features! Only regular functions available for now.
Automatically generate Go code for mocking interfaces in unit tests
WITH-REDEFS enables rebinding of global functions, inspired by Clojure's with-redefs
Open-source Modbus RTU/TCP slave simulator for the LRI AEM-60DC8 industrial DC monitor — 147 holding registers, 8 DC channels, 6 baudrates. SCADA/PLC integration testing without hardware.