The test consists of two projects:

• StringProcessor - the main project.
• StringProcessor.Tests - the unit test project (using xUnit).

1. Write code in the main project to ensure that the four unit tests pass.
   Note: for the purposes of this test, a word includes punctuation. "I'm" is a single word and "that." is five characters long (including the full-stop).

2. Add a project and code to the solution to fulfil the following requirement:

   GIVEN a text string
   WHEN it is sent to a HTTP API endpoint
   THEN JSON representing the populated StringStatsModel is returned

   Ensure that you can test this via your preferred method (Postman, integration test or webpage, etc)

3. (Optional / for bonus points) Write a fifth unit test which tests very large input to the StringStatsProcessor.Run(string) method.