Stripe\Tests\Api\InvoicesTest::testGetUpcomingInvoice PHP Метод

    public function testGetUpcomingInvoice()
    {
        $this->client->post('invoiceitems', null, array('customer' => $this->customerId, 'amount' => 350, 'currency' => 'usd'));
        $invoices = $this->invoices->getUpcomingInvoice($this->customerId);
        $this->assertInstanceOf(Invoices::INVOICE_RESPONSE_CLASS, $invoices);
    }