Please read the documentation in the source code file and complete the requirement.

Definition of Done

• No additional 3rd party libraries are allowed, esp. lodash and underscore.
• All unit tests are passed.
• There is no linting error.
• Good code quality.
  • Meaningful names of class, variable and functions.
  • Using full name rather than abbreviation.
  • Using appropriate data structure.

Hint

Running Unit Test

If you want to run all the unit test, you can run:

$ npm test

If you want to run test which matches certain patterns, you can run:

$ npm test -- <pattern>

For example.

$ npm test -- receptionist

Linting Your Code

You can use the following command to check if your code violates the coding standard:

$ npm run lint