public function testExclusive()
{
$loader = new SS_ClassLoader();
$loader->pushManifest($this->testManifest1);
$this->assertTrue((bool) $loader->getItemPath('ClassA'));
$this->assertFalse((bool) $loader->getItemPath('OtherClassA'));
$loader->pushManifest($this->testManifest2);
$this->assertFalse((bool) $loader->getItemPath('ClassA'));
$this->assertTrue((bool) $loader->getItemPath('OtherClassA'));
$loader->popManifest();
$loader->pushManifest($this->testManifest2, false);
$this->assertTrue((bool) $loader->getItemPath('ClassA'));
$this->assertTrue((bool) $loader->getItemPath('OtherClassA'));
}