What is JMockit?

JMockit is a mocking library for Java that enables developers to easily write unit tests with a focus on high test coverage and refactoring safety. It allows mocking of classes, interfaces, final methods, static methods, constructors, and private methods, providing fine-grained control over the behavior of dependencies during testing. JMockit is often used when traditional mocking frameworks are insufficient due to the limitations of the Java language or complex dependencies.