test(app): Add tests for App.php

[usernane]

File

App.php

Current Coverage

28.6% (77/269)

Scenarios to Cover

• App initialization in different run environments (CLI, HTTP, test)
• Config loading and access via App::getConfig()
• DB connection registration and retrieval
• Autoloader setup
• Error handler registration per environment
• App::getAppVersion() and related metadata methods
• Uncovered bootstrap paths (remaining ~71%)

Notes

The main application class. Low coverage here means large parts of the bootstrap process are untested.