public function testGetPaymentMethodInstance() { $paymentMethodInstance = $this->getMockBuilder('Magento\\Payment\\Model\\Method\\AbstractMethod')->disableOriginalConstructor()->setMethods(['setStore'])->getMockForAbstractClass(); $paymentMethodInstance->expects($this->once())->method('setStore'); $this->paymentDataMock->expects($this->once())->method('getMethodInstance')->willReturn($paymentMethodInstance); $this->assertSame($paymentMethodInstance, $this->model->getPaymentMethodInstance()); }