# Using JUnit Rules to simplify your tests

DevFeed: [Using JUnit Rules to simplify your tests](<https://devfeed.tech/articles/using-junit-rules-to-simplify-your-tests-37795.md>)

Original publisher: [Read original article](<https://carlosbecker.com/posts/junit-rules/>)

Author: Carlos Alexandro Becker

Published: 2014-11-18T00:00:00Z

Content type: tutorial

Language: en

Sources: [Carlos Becker](<https://devfeed.tech/sources/carlos-becker.md>)

Topics: [test](<https://devfeed.tech/topics/test.md>), [Code](<https://devfeed.tech/topics/code.md>), [exceptions](<https://devfeed.tech/topics/exceptions.md>), [interface](<https://devfeed.tech/topics/interface.md>)

Tags: [code](<https://devfeed.tech/tags/code.md>), [exceptions](<https://devfeed.tech/tags/exceptions.md>), [interface](<https://devfeed.tech/tags/interface.md>), [junit](<https://devfeed.tech/tags/junit.md>), [mockito](<https://devfeed.tech/tags/mockito.md>), [simplify](<https://devfeed.tech/tags/simplify.md>), [tests](<https://devfeed.tech/tags/tests.md>)

## AI overview

This tutorial explains how to use JUnit Rules to reduce repeated setup and teardown code in tests. It covers timeouts, temporary folders, expected exceptions, custom rules, Mockito initialization, external resources, and integration-test server lifecycle management.

## Source excerpt

Have you ever written JUnit tests extending a class that does some before and after work, so you didn't have to repeat that code in various test classes?