5-2 Make Readable Code

Start by accepting the classroom50 activity. Run npm install to download the dependencies for this project, and then open it in VSC. Run npm run test to run the tests of the existing code (or run the script in VSC). You will see that the tests pass. If you run npm run lint you will see that there exactly 3 linting errors, all of which are in incomeTax.ts. You can ignore these for this activity.

Your team is writing a simulator for a traffic light in a large city. Whitley, an intern in your group, has written the code in TrafficLight.ts, and the tests in TrafficLight.test.ts.

Your team leader, Adrian, has asked you to critique Whitley's code based on the Five Code-Level Design Principles. Adrian says that he has already received some feedback from the client, who complained that the code expects all lights to display red to be on for 20 seconds, yellow for 5 seconds, and green for 15 seconds, but there are traffic lights in the city that do not conform to that pattern. They may have different display times, or they may have different symbols as well (e.g. left-turn arrows, etc.)

Write a new file, called betterTrafficLight.ts, which uses the Principles of this module to address some of the problems raised by the customer. Put comments in your code that document your improvements.

Update TrafficLight.test.ts to import from betterTrafficLight.ts. Your code should pass all the existing tests without any modifications to them. After confirming that the existing tests pass, you are encouraged to add your own new tests in the same file to verify any extra improvements you make.

There should be no linting errors or warnings in betterTrafficLight.ts.

Submit your betterTrafficLight.ts.

This assignment will be graded on a Satisfactory/Minimal basis. To receive a satisfactory grade, your code must satisfy the criteria for readable code, and must address both of the problems raised by the customer. You will receive a minimal grade if your code does not satisfy the criteria for readable code, or if it does not address both of the problems raised by the customer. You will receive no credit if your code does not pass the tests in TrafficLight.test.ts.