test(MIME): Add tests for MIME::getType()

[usernane]

File

WebFiori/File/MIME.php

Current Coverage

No dedicated tests exist for the MIME class.

Scenarios to Cover

• Common extensions return correct MIME types (jpg, png, txt, html, mp3, mp4, zip)
• Case-insensitive lookup (JPG, Png, TXT)
• Leading dot handling (.jpg, .png)
• Unknown extensions return application/octet-stream
• Empty string input
• Extensions with whitespace

Notes

The MIME class is currently only tested indirectly through File and FileUploader tests.