@covers PHPUnit_Framework_Assert::assertContains
public function testAssertIteratorContainsString() {
  $this
    ->assertContains('foo', new TestIterator(array(
    'foo',
  )));
  try {
    $this
      ->assertContains('foo', new TestIterator(array(
      'bar',
    )));
  } catch (PHPUnit_Framework_AssertionFailedError $e) {
    return;
  }
  $this
    ->fail();
}