Testing with JavaScript patternsUnderstand the unique grammatical structure of JavaScript and describe the techniques and principles required to develop robust programs. Demonstrate how to develop error-free and robust programs using pattern and unit testing, such as callback patterns, primes patterns, singleton patterns, and decorator patterns. After reading this book, you will gain insights into software engineering principles such as SOLID and DRY as well as pattern and test, as well as the test-driven development (TDD) philosophy.