apex-enterprise-patterns/fflib-apex-mocks

Most popular Mocking framework for unit tests written in Java

EasyMock, makes mocking easier since 2001

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).

RSpec's 'test double' framework, with support for stubbing and mocking

A friendly substitute for .NET mocking libraries.

A mocking and stubbing library for Ruby

Mockito-inspired mock library for Dart

The most popular and friendly mocking framework for .NET

Native Scala mocking framework