This book constitutes the refereed proceedings of the 19th IFIP TC 6/WG 6.1 International Conference on Testing Communicating Systems, TestCom 2007, and the 7th International Workshop on Formal Approaches to Testing of Software, FATES 2007, held in Tallinn, Estonia in June 2007.

The 24 revised full papers presented together with 1 invited talk were carefully reviewed and selected from initially 61 submissions to both events. The papers address all current issues in testing communicating systems and formal approaches in testing of software, ranging from classical telecommunication issues to general software testing. They were presented in 8 multipart sessions coverering automata-based testing, practical experiences, system testing, modular systems, and test quality.

This book constitutes the thoroughly refereed post-proceedings of the 5th International Workshop on Formal Approaches to Software Testing, FATES 2005, held in Edinburgh, UK, in July 2005 in conjunction with CAV 2005. The book presents 13 revised full papers together with 1 work-in-progress paper. These address formal approaches to testing and use techniques from areas like theorem proving, model checking, constraint resolution, program analysis, abstract interpretation, Markov chains, and various others.

IFM 2000, the second in a series of international conferences on Integrated F- mal Methods, was held at the 18th-century chateau DEGREES of Schloss Dagstuhl, Sa- land, Germany, from the 1st to the 3rd of November 2000. The conference programme consisted of invited talks from Sir Tony Hoare FRS and Wolfram Schulte, along with 22 papers selected from 58 submissions. Applying formal methods may involve the modelling of di erent aspects of a system that are expressed through di erent paradigms. This motivates us to research the combination of di erent viewpoints of a system, either by the creation of hybrid notations, by extending existing notations, by translating between notations, or by incorporating a wider perspective with the innovative use of an existing notation. The integration of formal methods promises great bene ts to systems - delling and software development. Regardless of the approach taken, however, signi cant issues can arise in areas such as semantic integration, the tracta- lity of our notations, the integration of tool support, the integration of proof systems, consistency, and completeness. Issues arise equally in our conceptua- sation of systems at di erent levels of abstraction and the development of these conceptualisations through the process of re n