public function getCaseSensitivePackageKeyReturnsTheUpperCamelCaseVersionOfAGivenPackageKeyIfThePackageIsRegistered()
{
$packageManager = $this->getAccessibleMock(PackageManager::class, ['dummy']);
$packageManager->_set('packageKeys', ['acme.testpackage' => 'Acme.TestPackage']);
$this->assertEquals('Acme.TestPackage', $packageManager->getCaseSensitivePackageKey('acme.testpackage'));
}