NotImplementedError: ElasticNetworkInterfaces(AmazonVPC).describe_network_interface_attribute is not yet implemented

Question

How describe a network interface attribute for a mock_ec2 in test_elastic_network_interfaces_get_by_description function?

@mock_ec2 def test_elastic_network_interfaces_get_by_description():
    ec2 = boto3.resource("ec2", region_name="us-east-1")
    ec2_client= ec2.meta.client

    vpc = ec2.create_vpc(CidrBlock="10.0.0.0/16")
    vpc.reload()
    subnet = ec2.create_subnet(
        VpcId=vpc.id, CidrBlock="10.0.0.0/24", 
        AvailabilityZone="us-east-1a")

    desc = str(uuid4())
    eni1 = ec2.create_network_interface(
        SubnetId=subnet.id, PrivateIpAddress="10.0.10.5", Description=desc )

    # The status of the new interface should be 'available'
    waiter = ec2_client.get_waiter("network_interface_available")
    waiter.wait(NetworkInterfaceIds=[eni1.id])

    eni1.modify_attribute(SourceDestCheck={'Value': False})
    eni1.reload()
    response = eni1.describe_attribute(Attribute='description')

python 3.7
mock 4.0.3
moto 2.1.0
sure 2.0.0
aiobotocore 1.4.2
boto3 1.18.2 botocore ​1.20.106
coverage 5.5

What is needed to implement or fix to run or pass the test?

Answer 1

If after update or scaffold-script of moto library the method is not implemented in a library yet and continue an error like this :

NotImplementedError: ElasticNetworkInterfaces(AmazonVPC).describe_network_interface_attribute is not yet implemented

An easy solution for the test is a monkeypatch function that lets simulates the method not implemented.

def client_mock(Attribute='description'):
    return {
        'Attachment': {
            'AttachTime': 34545,
            'DeleteOnTermination': False,
            'DeviceIndex': 123,
            'NetworkCardIndex': 123,
            'InstanceId': 'eni1.instanceid',
        },
        'Description': {
            'Value': 'Vpc network inteface'
        },
        'Groups': [
            {
                'GroupName': 'name group',
                'GroupId': 'grupoid'
            },
        ],
        'NetworkInterfaceId': 'eni.id',
        'SourceDestCheck': {
            'Value': False
        }
    }

and put it with attributes on the pass at respective the function or method

monkeypatch.setattr(eni1, "describe_attribute", client_mock)

If you know a better solution, please post it!