Included are two example lambda functions: helloWorld which does all the incredible things you expect from that name, and robots which implements a simple CRUD REST API using Cassava.
Linting is running a program that checks the source code for potential style and logical problems. The linter is set up to be run with: npm run lint.
Linting is provided by ESLint with a TypeScript plugin. Check out the documentation for adjusting the rules to suit your preferred style.
Unit testing is provided by Mocha and Chai and is run with: npm run test.
Test files are located next to the file being tested with the extension .test.ts. eg: index.ts is beside test file index.test.ts. Just like libraries not referenced by index.ts WebPack will not include these files in the distribution.