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DrJava is a lightweight programming environment for Java designed to foster test-driven software development. It includes an intelligent program editor, an interactions pane for evaluating program text, a source level debugger, and a unit testing tool.
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Dude is a small simple development environment written in Java which allows you to compile and run Java programs without using the command window. It is platform independent and open source. Dude is easy to set up and uses the same directory structure for source and object files.
Smokestack is a modular JEE unit testing framework, independent of Java unit testing framework (like JUnit or TestNG) with functionality geared for validation.
WmUnit is a unit testing framework for testing WebMethods Integration Server services.
It is 100% JUnit compliant and is equipped with test generator. It means you can produce JUnit test for your WM service in minutes.
Alster is a unit testing framework for XSLT files written in XSLT itself (but with a dependency on Nalax, an XSLT extension package for Apache Xalan-J).
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TigerUnit is a unit testing framework that takes advantage of Java 5 features, namely annotations. It is based on the JUnit code base, and takes much of its design from NUnit. It is fully backward-compatible with JUnit tests.
WUIv (Web UI Validator) is a Java-based end-to-end and unit testing framework for the User Iinterface of web appications. The project aims to allow for look-and-feel verification in an automated fashion (integrating with JUnit)
Surrogate is a complimentary unit testing framework, especially suitable for unit testing of large, complex Java systems. Surrogate integrates seamlessly with JUnit, MockEJB and various mock object implementations and is based on the AspectJ technology
Testsweet is a unit testing tool to ensure that all tests in a project are being run, by either auto generating unit test suites at runtime, or ensuring that all tests in a project are included in a static suite at build time.
JMXUnit is a simple extension of Junit - the popular java unit testing framework from Erich Gamma and Kent Beck. The goal of the JMXUnit package is to support JMX vendor independent testing of JMX MBeans.
TiniUnit is a XUnit-like unit testing framework suitable for use on the Dallas Semiconductors TINI board. TiniUnit is similar the JUnit in intent, but is does not require reflection since the 1.0x version of the TINI OS does not support reflection.
jECMAUnit is an ECMA (Javascript) unit testing framework that uses the underlying javascript engine and JUnit to perform the tests in java, allowing browser-less unit testing of javascript code
RCPUnit is an unit testing framework, an automatic GUI testing framework, and a plugin for Eclipse RCP. It runs with PDE JUnit or other unit testing frameworks. It brings you the ability to do unit testing easily in RCP applications, and SWT application.