This comprehensive guide to Agile Testing provides an in-depth look at the various testing techniques and strategies used in the Agile software development methodology. It covers topics such as test-driven development, test automation, and continuous integration, as well as how to apply these techniques
From Wikipedia
Agile testing is a software testing practice that follows the principles of agile software development. Agile testing involves all members of a cross-functional agile team, with special expertise contributed by testers, to ensure delivering the business value desired by the customer at frequent intervals, working at a sustainable pace. Specification by example is used to capture examples of desired and undesired behavior and guide coding.