public function testPrepend()
{
$col = new PropelCollection();
$this->assertEquals(1, $col->prepend('a'), 'prepend() returns 1 on an empty collection');
$data = array('bar1', 'bar2', 'bar3');
$col = new PropelCollection($data);
$this->assertEquals(4, $col->prepend('bar4'), 'prepend() returns the new number of elements in the collection when adding a variable');
$this->assertEquals(array('bar4', 'bar1', 'bar2', 'bar3'), $col->getData(), 'prepend() adds new element to the beginning of the collection');
}