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Yale-Harvard game ticket sales activity

Introduction

The Yale-Harvard football game is fast approaching. Here, we're going to write some code that could power an online ticket sales application. We'll be working on just a small piece of the code: the part that fulfills ticket orders and keeps track of how many seats of each kind are available in the stadium.

Yale Bowl

What you should learn

This activity should demonstrate to you how test driven development can be useful when there are many constraints on your code. In our problem at hand--football ticket sales--there are many constraints including the size of the stadium, the price of different tickets, etc.

Structure of the code

This repository has the following files:

./README.md
./testRunner.html
./src/football.js
./tests
./tests/footballTests.js
./lib/jasmine-2.3.4
./lib/jasmine-2.3.4/boot.js
./lib/jasmine-2.3.4/console.js
./lib/jasmine-2.3.4/jasmine-html.js
./lib/jasmine-2.3.4/jasmine.css
./lib/jasmine-2.3.4/jasmine.js
./lib/jasmine-2.3.4/jasmine_favicon.png

The code you will write is in the ./src/football.js and ./tests/footballTests.js files. These files are loaded by the ./testRunner.html file, which you can open in your browser just like any other HTML file. When you open the ./testRunner.html file, it will run the tests that we've written (and that you will write) in the ./tests/footballTests.js file. These tests ensure the code in ./src/football.js is working how you expect it to: that it is fulfilling requests for tickets, not overselling the tickets, giving people appropriate discounts, etc.

Constraints

The ticket sales for the game should work as follows:

  • The ticket booth has 1,000 seats available at first, 500 of which are in section A and 500 of which are in section B.
  • Tickets in section A have a much better view and cost $50. Tickets in section B are $30.
  • Yale College students get a 50% discount on all ticket purchases.
  • The ticket booth will not fulfilled ticket orders if they cannot be fulfilled in full.
  • Students can only order one kind of ticket at a time.
  • (stretch) SOM has reserved a block of 100 B seats for its students that are available at a 50% discount. But, once they're gone, they're gone. These tickets cannot be purchased by anybody except SOM students.

Your task

We'll be working with some code for this assignment. You're welcome to use a new node.js project on cloud9, or work locally on your machine if you prefer.

You're going to be altering football.js to reflect the requirements articulated above. There is a function in that code called placeTicketOrder which is called on each order, and updates the ticket booth's availability.

There are some tests to get you started. You will want to add more in the file ./tests/footballTests.js to ensure you satisfy the constraints.

When you think you're ready, a TA will help you check your solution.

Caveats

In order to keep this code easy to understand, we avoided some more advanced techniques you might see in JavaScript (or programming in general). So, the code you see here is not necessarily the best way to approach this problem. Instead, it is the most clear for our activity today.