Addition to Many Attribute test to check that inheritance is actually working

many_attribute.js

test("inheritance is taken into account for related records", function () {
  MyApp.Family = SC.Record.extend({
    people: SC.Record.toMany('MyApp.Person', {
      inverse: 'family',
      isMaster: NO
    })
  });

  MyApp.Person = SC.Record.extend({
    family: SC.Record.toOne('MyApp.Family', {
      inverse: 'people',
      isMaster: YES
    })
  });

  MyApp.Parent = MyApp.Person.extend();
  MyApp.Child = MyApp.Person.extend();

  SC.RunLoop.begin();
  MyApp.store.loadRecords(MyApp.Family, [
    { guid: 'Simpsons', people: ['Homer', 'Marge', 'Bart', 'Lisa', 'Maggie'] }
  ]);

  MyApp.store.loadRecords(MyApp.Parent, [
    { guid: 'Homer', family: 'Simpsons' },
    { guid: 'Marge', family: 'Simpsons' }
  ]);

  MyApp.store.loadRecords(MyApp.Child, [
    { guid: 'Bart', family: 'Simpsons' },
    { guid: 'Lisa', family: 'Simpsons' },
    { guid: 'Maggie', family: 'Simpsons' }
  ]);
  SC.RunLoop.end();

  var theSimpsons = MyApp.store.find(MyApp.Family, 'Simpsons');
  equals(theSimpsons.getPath('people.length'), 5,
         'there should be 5 people in the family');

  theSimpsons.get('people').forEach(function (person) {
    ok(['Homer', 'Marge', 'Bart', 'Lisa', 'Maggie'].indexOf(person.get('guid')) !== -1,
       'the person "%@" is an invalid person.'.fmt(person.get('guid')));
  });
});