public function testSuccessivePeekCallsReturnTheSameValue()
{
$first = 'foo';
$second = 'bar';
$consumable = new Consumable(array($first, $second));
$this->assertSame($first, $consumable->peek());
$this->assertSame($first, $consumable->peek());
$this->assertSame($first, $consumable->consumeNext());
$this->assertSame($second, $consumable->peek());
$this->assertSame($second, $consumable->peek());
$this->assertSame($second, $consumable->consumeNext());
}
