EE Simple Calculator Demo

This project refers to version 68248247cd23ebffaa256f583e0e4ce05b4a0b86 of your problem description. Go to https://algo26.de/demo/ee-calculator/index.html to see a snapshot of the end result (generated at 2020-09-16).

Technological decisions for this project:

• JavaScript (ES 6) has been chosen with no extra framework to really have the least amount of complexity.
• The JS is processed by Webpack to generate browser agnostic code.
• SASS is used as the CSS preprocessor, Webpack also takes care of producing the CSS.
• For some scaffolding I chose Bootstrap, which is just referenced by the final HTML document.
• Testing is performed with Jasmine.
• Docker helps to encapsulate the build environment and offers a runtime locally for executing tests and see the end result.

Structure of the project:

• src holds the source files (JS and SASS)
• test holds the test specifications
• public holds the rendered files (and the HTML and images)

Run tests locally:

As mentioned this project uses Docker to offer a well-defined build environment. I assume, you are familiar enough to run docker containers and also have it installed on your machine. You should also be comfortable on a shell of your choosing.

1. First create a directory in the location of your choice, e.g. ~/ee-calculator-demo

2. Now obtain the project data, either via git clone or as a ZIP from here: https://github.com/algo26-matthias/ee-calculator (Click the big green button labelled "Code").

3. Depending on how you obtained the project you should now see a bunch of folders and files, one of which should be docker-compose.yml. If all you see is the folder ee-calculator, change into this directory.

4. Start the docker container with the command docker-compose up -d. Depending on the speed of your internet connection and the power of your computer this might take a few minutes. Once it is done, you can try opening this URL in your browser: http://localhost:8199/ - you should now see the calculator.

5. For running the tests type docker exec -it ee-calculator-node bash -c "npm run test" in your shell.

What could be improved:

• The test coeverage is not what it should be, I'd like to add proper e2e tests as well.
• The business logic needs proper refactoring, the HandleEventService does way too much and is crossing layers.
• Add missing features (proper CE / AC handling for instance).