As the complexity and miniaturization of electronic hardware advances, more time and money is actually now spent on testing and verification than in the preliminary design stage. This practical-oriented guidebook covers both the fundamentals and the techniques of constraint-based testbench automation. The book compares and contrasts constraint-based verification with traditional testbench approaches: test generation (a key concept), simulation monitoring, and coverage. Related aspects of verification languages such as e/vera/PSL/OVL/SVA are also covered. On the technical side, state-of-the art algorithms of test generation, performance optimization, and randomization are explained.