public function testCanAddMultipleTransactionsToTracker()
{
$tracker = new Tracker(123);
$transaction1 = new Transaction(123, 12.5);
$transaction2 = new Transaction(456, 12.5);
$tracker->addTransaction($transaction1);
$tracker->addTransaction($transaction2);
$transactions = count($tracker->getTransactions());
$this->assertEquals(2, $transactions);
}
