LoopBack 4 is more than just a framework: It’s an ecosystem that encouragesdevelopers to follow best practices through predefined standards.

In this section, we provide guidelines on building LoopBack application andextensions the test-driven way, to make such projects robust and easy tomaintain.

• Defining the API using code-first approach:This section guides you through setting up a skeleton of your application sothat its full OpenAPI specification can be automatically generated.

• Defining your testing strategy:This section discusses the advantages and the process of building a strongtesting suite.

• Testing your application: A collection ofpractical tips and code snippets useful to developers writing LoopBackapplications.

• Testing your extension: A collection ofpractical tips and code snippets useful to developers building LoopBackextensions.