Project's structure

• src - Root source directory
• integration-test - Integration tests
• package.json - Project configuration

The task

The main goal of this task is to create a list of functions that will be used as it described in the integration tests.

Requirements

• The code should be written in TypeScript.
• The existing integration tests should pass.
• The existing integration tests should not be modified.
• If you need to add new tests, you can do it in a separate test file.