Get a full fake REST API with zero coding in less than 30 seconds (seriously)
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A toolkit with common assertions and mocks that plays nicely with the standard library
- testify
- go
- assertions
- mocking
A library that allows you to easily mock out tests based on AWS infrastructure.
A tool for mocking HTTP services
- wiremock
- json
- mocking
- stubbing
Turn any OpenAPI2/3 and Postman Collection file into an API server with mocking, transformations and validations.
- oas
- prism
- mocking
- api-testing
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
PowerMock is a Java framework that allows you to unit test code normally regarded as untestable.
Papercut SMTP -- The Simple Desktop Email Server
A friendly substitute for .NET mocking libraries.
- c-sharp
- dotnet
- dot-net
- testing
An in memory postgres DB instance for your unit tests
- hacktoberfest
- pg-promise
- typeorm
- node-postgres
Get a full fake GraphQL API with zero coding in less than 30 seconds.
- graphql
- graphql-server
- express-graphql
The easy mocking library for .NET
- mocking
- fake-objects
- dotnet
- dotnet-core
Testing layer for Microsoft's HttpClient library. Create canned responses using a fluent API.
vfsStream is a stream wrapper for a virtual file system that may be helpful in unit tests to mock the real file system. It can be used with any unit test framework, like PHPUnit or SimpleTest.
- vfsstream
- php
- testing
- filesystem
A mocking and stubbing library for Ruby
- ruby
- minitest
- test-unit
- mock
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
Bypass provides a quick way to create a custom plug that can be put in place instead of an actual HTTP server to return prebaked responses to client requests.
🐤Dynamically Mock server behaviors and responses in Swift
- func
- kakapo
- json-api
- opinionated
pgx mock driver for golang to test database interactions
Fake server, Consumer Driven Contracts and help with testing performance from one configuration file with zero system dependencies and no coding whatsoever
DeepfakeHTTP is a web server that uses HTTP dumps as a source for responses.
- http-server
- dump
- dummy
- testing
In-page HTTP controller for frontend development. Intercept, modify, and simulate API responses directly in the browser.
Generate mocks from ActiveRecord models for unit tests that run fast because they don’t need to load Rails or a database.