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
Open-source platform for creating safe, isolated production sandboxes for API, integration, and E2E testing.
Most popular Mocking framework for unit tests written in Java
- mockito
- java
- mocking-framework
- testing-tools
An email and SMTP testing tool with API for developers
- email-testing
- go
- golang
- smtp-server
Mockery is a simple yet flexible PHP mock object framework for use in unit testing with PHPUnit, PHPSpec or any other testing framework. Its core goal is to offer a test double framework with a succinct API capable of clearly defining all possible object operations and interactions using a human readable Domain Specific Language (DSL).
- mockery
- phpunit
- php
- stub
Test spies, stubs and mocks for JavaScript.
- stubs
- javascript
- tdd
- test-driven-development
Mockoon is the easiest and quickest way to run mock APIs locally. No remote deployment, no account required, open source.
Catches mail and serves it through a dream.
- smtp
- server
- ruby
Record your test suite's HTTP interactions and replay them during future test runs for fast, deterministic, accurate tests.
:wrench: Utility library for GraphQL to build, stitch and mock GraphQL schemas in the SDL-first approach
- graphql-schema
- schema-language
- graphql
- graphql-api
Stub your network requests easily! Test your apps with fake network data and custom response time, response code and headers!
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
A utility for mocking out the Python Requests library.
- tag-production
PowerMock is a Java framework that allows you to unit test code normally regarded as untestable.
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.
Pester is the ubiquitous test and mock framework for PowerShell.
- powershell
- pester-tests
- powershell-tests
- assertions
A friendly substitute for .NET mocking libraries.
- c-sharp
- dotnet
- dot-net
- testing
🎲 Mock or extend your GraphQL API with faked data. No coding required.
Lightweight service virtualization/ API simulation / API mocking tool for developers and testers
- api-simulation
- golang
- proxy
- mitm
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