function testIterator()
{
$set = new DataObjectSet(array($one = new DataObject(array('Title' => 'one')), $two = new DataObject(array('Title' => 'two')), $three = new DataObject(array('Title' => 'three')), $four = new DataObject(array('Title' => 'four'))));
// test Pos() with foreach()
$i = 0;
foreach ($set as $item) {
$i++;
$this->assertEquals($i, $item->Pos(), "Iterator position is set correctly on ViewableData when iterated with foreach()");
}
// test Pos() manually
$this->assertEquals(1, $one->Pos());
$this->assertEquals(2, $two->Pos());
$this->assertEquals(3, $three->Pos());
$this->assertEquals(4, $four->Pos());
// test DataObjectSet->Count()
$this->assertEquals(4, $set->Count());
// test DataObjectSet->First()
$this->assertSame($one, $set->First());
// test DataObjectSet->Last()
$this->assertSame($four, $set->Last());
// test ViewableData->First()
$this->assertTrue($one->First());
$this->assertFalse($two->First());
$this->assertFalse($three->First());
$this->assertFalse($four->First());
// test ViewableData->Last()
$this->assertFalse($one->Last());
$this->assertFalse($two->Last());
$this->assertFalse($three->Last());
$this->assertTrue($four->Last());
// test ViewableData->Middle()
$this->assertFalse($one->Middle());
$this->assertTrue($two->Middle());
$this->assertTrue($three->Middle());
$this->assertFalse($four->Middle());
// test ViewableData->Even()
$this->assertFalse($one->Even());
$this->assertTrue($two->Even());
$this->assertFalse($three->Even());
$this->assertTrue($four->Even());
// test ViewableData->Odd()
$this->assertTrue($one->Odd());
$this->assertFalse($two->Odd());
$this->assertTrue($three->Odd());
$this->assertFalse($four->Odd());
}
