This is the only book to explore unit testing as a language-independent, standalone development methodology. It covers the theory and methodology of unit test frameworks, offers instruction in unit test development, provides useful code examples in both Java and C++, and details the most commonly used frameworks from the XUnit family, including JUnit for Java, CppUnit for C++, and NUnit for .NET. It also includes the complete source code for CppUnit for C++ and NUnit for .NET.