test_clf_transport.py 文件源码

def test_init_fail_open(self, usb_context):
        device = self.Device(0x1000, 0x2000, 1, 2, [
            self.Settings([
                self.Endpoint(0x0004, 0x0002),
                self.Endpoint(0x0084, 0x0002),
            ])
        ])
        device.open = MagicMock()
        device.open.side_effect = [
            nfc.clf.transport.libusb.USBErrorAccess,
            nfc.clf.transport.libusb.USBErrorBusy,
            nfc.clf.transport.libusb.USBErrorNoDevice,
        ]
        usb_context.return_value.getDeviceList.return_value = [device]

        with pytest.raises(IOError) as excinfo:
            nfc.clf.transport.USB(1, 2)
        assert excinfo.value.errno == errno.EACCES

        with pytest.raises(IOError) as excinfo:
            nfc.clf.transport.USB(1, 2)
        assert excinfo.value.errno == errno.EBUSY

        with pytest.raises(IOError) as excinfo:
            nfc.clf.transport.USB(1, 2)
        assert excinfo.value.errno == errno.ENODEV