About JavaScript Canvas Page

About Page

The UI shows a canvas with some input fields.

Selecting the various values in the input fields will trigger a JavaScript command that will draw shapes on the canvas.

Each command will be shown in the list on the right of the canvas.

JavaScript Instructions

Commands:

• draw(shape, x, y, size, "#colour")
• clearCanvas()

Note:

• shape is 1 for circle, 0 for square
• colour is an rgb string e.g. "#FF1C0A"
• size is in pixels
• canvas is 300 x 300

Automating UI

The form itself is possible to automate using simple locators.

JavaScript Hacking

Because the underlying commands are hooked into the dom it is possible to run the commands from the JavaScript console to create shapes on the canvas.

Exploratory Testing

Exploratory Testing might highlight usability improvements or missing functionality that would aid the user.

Suggested Exercises

• There is no 'save' function in the app. Write some JavaScript in the console that will scrape the commands and output them in a string. Clear the screen and use the generated script to recreate the image.