public function test_each_cons_1()
{
$arr = range(1, 10);
$follower = 0;
$message = '';
Enumerator::each_cons_($arr, 3, function ($key, $value, $leader) use(&$follower, &$message) {
if ($follower < $leader) {
$message .= '||';
$follower = $leader;
}
$message .= $value . ',';
});
$this->assertEquals("1,2,3,||2,3,4,||3,4,5,||4,5,6,||5,6,7,||6,7,8,||7,8,9,||8,9,10,", $message);
$this->assertEquals(array(array(1, 2, 3), array(2, 3, 4), array(3, 4, 5), array(4, 5, 6), array(5, 6, 7), array(6, 7, 8), array(7, 8, 9), array(8, 9, 10)), $arr);
}