Testing 2 things with 2 test methods.

GOOD-2_tests_2_methods.php

<?php
public function testIteratesOverOneElementArraysUsingValues()
{
  $iterator = new ArrayIterator(array('foo'));
  foreach ($iterator as $element) {
    $this->assertEquals('foo', $element);
  }
}
public function testIteratesOneTimeOverOneElementArrays()
{
  $iterator = new ArrayIterator(array('foo'));
  $i = 0;
  foreach ($iterator as $element) {
    $i++;
  }
  $this->assertEquals(1, $i);
}