public function testGetCollectionInheritance()
 {
     $this->assertEquals(array('My_ShantyMongo_User'), My_ShantyMongo_User::getCollectionInheritance());
     $inheritance = My_ShantyMongo_Student::getCollectionInheritance();
     $this->assertEquals('My_ShantyMongo_Student', $inheritance[0]);
     $this->assertEquals('My_ShantyMongo_User', $inheritance[1]);
     $inheritance = My_ShantyMongo_ArtStudent::getCollectionInheritance();
     $this->assertEquals('My_ShantyMongo_ArtStudent', $inheritance[0]);
     $this->assertEquals('My_ShantyMongo_Student', $inheritance[1]);
     $this->assertEquals('My_ShantyMongo_User', $inheritance[2]);
 }