public function testNavigateOverSizes()
{
$expected = range(0, 7, 2);
$s = new Size($expected);
foreach ($s as $sItem) {
$this->assertTrue(in_array($sItem, $expected));
}
$s->rewind();
for ($i = 0; $i < count($expected); $i++) {
$this->AssertEquals($expected[$i], $s->current());
$s->next();
}
}