The calculator app should be able to perform basic arithmetic functions (addition, subtraction, multiplication and division) on a set of hexadecimal numbers. The restrictions for the calculator is that it will only take inputs of up to 3 digits, return answers up to 6 digits, not return any negative answers, and not return any answers with decimal places.
- Goal
- Functional Requirements
- Optional Extras
- Video
- Development server
- Running unit tests
- Running end-to-end tests
| Category | Functional Requirements |
|---|---|
| Arithmetic Operations | Addition Subtraction Multiplication Division |
| Input and Output | Limit input to 3-digit hexadecimal values Limit output to non-negative, whole, 6-digit, hexadecimal values Display input as hexadecimal value equations Display output as hexadecimal values Allow values and operations to be input by pressing buttons |
| Error Handling and Limitations | Display error for /0 Display error for / Disallow input > 3 digits Display absolute value of output (disallow negative output) Disallow values > 6 digits Display error for / Disallow decimal places in input Limit calculations to one operator and two operands at a time (disallow chaining) Disallow answers to be used as input in the next equation (since these are likely > 3 digits) Disallow evaluation of empty / incomplete equations |
| UI | Buttons for letters A-F Buttons for 0-9 Buttons for +,-,/,* Button to backspace / clear value Button to clear equation Button to submit (equals) |
- Allow values and operations to be input via keyboard
- Store every calculation and answer in a database
- Allow a user to view calculation history
- Display hex values (input, output) as colours Please note you need to be part of the University of Pretoria to access.
The link to the demonstration video is here: demonstration video
This project was generated with Angular CLI version 17.3.7.
Run ng serve for a dev server. Navigate to http://localhost:4200/. The application will automatically reload if you change any of the source files.
Run ng test to execute the unit tests via Karma.
Run npm run test:cypress to execute the end-to-end / UI tests via cypress.