moto/Lobby

so i decided this SPECIFIC test was not actually useful (scrapped it) so ignore the uselessness of the test. i guess my confusion is regarding fixtures in general. when i call client.attach_volume.assert_called_with() against my moto client fixture i get error: AttributeError: 'function' object has no attribute 'assert_called_with'

conftest.py

@pytest.fixture(scope='function')
def client(aws_credentials):
    with mock_ec2():
        yield boto3.client('ec2', region_name=REGION)

lambda_function.py

def attach_ebs_volume(client, instance_id, region):
    while utils.get_instance_state(client, instance_id) != "running":
        print("waiting for instance to start")
        time.sleep(5)
        #TODO: timeout

    for tag in utils.get_instance_tags(client, instance_id):
        if tag['Key'] == "volume":
            vol_tag = tag['Value']

    volume_id = utils.get_ebs_by_name_tag(client, vol_tag)
    client.attach_volume(
        Device="/dev/xvdz",
        InstanceId=instance_id,
        VolumeId=volume_id
    )

output from pytest:

    @mock.patch('utils.get_instance_state')
    @mock.patch('utils.get_instance_tags')
    def test_attach_ebs_volume(mock_get_instance_tags, mock_get_instance_state, client):
        volume_id = client.create_volume(Size=7, AvailabilityZone=REGION, TagSpecifications=VOLUME_TAGS)['VolumeId']
        instance_id = client.run_instances(ImageId='ami-123', MinCount=1, MaxCount=1, TagSpecifications=INSTANCE_TAGS)['Instances'][0]['InstanceId']

        mock_get_instance_state.return_value = 'running'
        mock_get_instance_tags.return_value = RETURN_TAGS

        r = lambda_function.attach_ebs_volume(client,
                                                instance_id=instance_id,
                                                region=REGION
                                                )

>       client.attach_volume.assert_called_with(Device="/dev/xvdz",
                                                InstanceId=instance_id,
                                                VolumeId=volume_id)
E       AttributeError: 'function' object has no attribute 'assert_called_with'

i was trying to test that client.attach_volume gets the right values. again, this is not actually that useful of a test but the functionality probably will in future tests