Invited Talks -- How Tests and Proofs Impede One Another: The Need for Always-On Static and Dynamic Feedback -- Myths in Software Engineering: From the Other Side -- Specifications from Testing -- QuickSpec: Guessing Formal Specifications Using Testing -- Testing Proofs -- Testing First-Order Logic Axioms in Program Verification -- Proving and Visualizing OCL Invariant Independence by Automatically Generated Test Cases -- Proof Process Evaluation with Mutation Analysis -- Test Generation Using Proof Techniques -- Generating Regression Unit Tests Using a Combination of Verification and Capture & Replay -- DyGen: Automatic Generation of High-Coverage Tests via Mining Gigabytes of Dynamic Traces -- Combining Static Analysis and Test Generation for C Program Debugging -- Generating High-Quality Tests for Boolean Circuits by Treating Tests as Proof Encoding -- Theorem Proving and Testing -- Relational Analysis of (Co)inductive Predicates, (Co)algebraic Datatypes, and (Co)recursive Functions -- Combining Theorem Proving and Narrowing for Rewriting-Logic Specifications -- Abstraction -- Syntactic Abstraction of B Models to Generate Tests -- Building a Test-Ready Abstraction of a Behavioral Model Using CLP.

This book constitutes the proceedings of the 4th International Conference on Tests and Proofs, held in Málaga, Spain, in July 2010.