public function testIsFirst()
{
$col = new Collection();
$this->assertTrue($col->isFirst(), 'isFirst() returns true on an empty collection');
$data = array('bar1', 'bar2', 'bar3');
$col = new Collection($data);
$expectedRes = array(true, false, false);
foreach ($col as $element) {
$this->assertEquals(array_shift($expectedRes), $col->isFirst(), 'isFirst() returns true only for the first element');
$this->assertEquals($element, $col->getCurrent(), 'isFirst() does not change the current position');
}
}
