/**
  * @expectedException ActiveRecord\RelationshipException
  */
 public function test_throw_error_if_relationship_is_not_a_model()
 {
     AuthorWithNonModelRelationship::first()->books;
 }
 /**
  * @expectedException ActiveRecord\RelationshipException
  */
 public function testThrowErrorIfRelationshipIsNotAModel()
 {
     AuthorWithNonModelRelationship::first()->books;
 }