Things to test

Boot

• There is a warning message when mobile is detected.
• There is a notice if WeBGL is not enabled.
• The app should not load download at all if is on a mobile device or WebGL is not enabled.
• The user can request downloading the app anyway on a mobile device.

Initialization

• There is always content in the application and the content is determined in this load order: 1. Requested by query string. 2. Backup from memory. 3. Default scene.
• Highlighted lines, if requested by query string, highlights the appropriate lines of the root scene file.
• Map view, if requested by the URL hash, repositions the map to the appropriate view. A default map view is used if there is no URL hash.
• URL informs app state only on initialization. Afterwards it reflects changes in app state.
• URL should not "reset" after initialization without user input.

Switching tabs

• When restoring a tab, content, scroll position, cursor position, highlighted lines, and the state of all inline markers and helpers (widgets) are restored.
• [ ]