@Test
public void testAddServiceReference() {
Object service = new Object();
mockServiceReference( service );
ServiceHolder holder1 = container.add( serviceReference );
ServiceHolder holder2 = container.add( serviceReference );
assertEquals( 1, container.size() );
assertSame( holder1, holder2 );
assertSame( serviceReference, holder1.getReference() );
assertSame( service, holder1.getService());