public function testExecute()
{
$invoiceId = 2;
$this->requestMock->expects($this->once())
->method('getParam')
->with('invoice_id')
->will($this->returnValue($invoiceId));
$invoiceMock = $this->getMock('Magento\Sales\Model\Order\Invoice', [], [], '', false);
$pdfMock = $this->getMock('Magento\Sales\Model\Order\Pdf\Invoice', ['render', 'getPdf'], [], '', false);
$pdfMock->expects($this->once())
->method('getPdf')
->willReturnSelf();
$pdfMock->expects($this->once())
->method('render');
$dateTimeMock = $this->getMock('Magento\Framework\Stdlib\DateTime\DateTime', [], [], '', false);
$invoiceRepository = $this->getMockBuilder('Magento\Sales\Api\InvoiceRepositoryInterface')
->disableOriginalConstructor()
->getMock();
$invoiceRepository->expects($this->any())
->method('get')
->willReturn($invoiceMock);
$this->objectManagerMock->expects($this->at(0))
->method('create')
->with('Magento\Sales\Api\InvoiceRepositoryInterface')
->willReturn($invoiceRepository);
$this->objectManagerMock->expects($this->at(1))
->method('create')
->with('Magento\Sales\Model\Order\Pdf\Invoice')
->willReturn($pdfMock);
$this->objectManagerMock->expects($this->at(2))
->method('get')
->with('Magento\Framework\Stdlib\DateTime\DateTime')
->willReturn($dateTimeMock);
$this->assertNull($this->controller->executeInternal());
}
