Update arrayaddunique MutateInMacro test

from datetime import timedelta

import couchbase.subdocument as SD

from couchbase.auth import PasswordAuthenticator

from couchbase.cluster import Cluster

from couchbase.diagnostics import ServiceType

from couchbase.exceptions import InvalidArgumentException

from couchbase.options import (ClusterOptions,

                               WaitUntilReadyOptions)

auth = PasswordAuthenticator('Administrator', 'password')

opts = ClusterOptions(auth)

cluster = Cluster.connect('couchbase://192.168.107.128', opts)

cluster.wait_until_ready(timedelta(seconds=3),

                         WaitUntilReadyOptions(service_types=[ServiceType.KeyValue, ServiceType.Query]))

collection = (cluster

              .bucket('default')

              .default_collection())

key = 'test_doc'

collection.upsert(key, { 'content': 'test content'})

xattr_array = 'xattr_array'

specs = [

    SD.upsert(xattr_array, [], xattr=True),

    SD.array_addunique(xattr_array, SD.MutationMacro.cas()),

]

try:

    collection.mutate_in(key, specs)

except InvalidArgumentException as ex:

    print(ex)

collection.mutate_in(key, (SD.upsert(xattr_array, [], xattr=True),))

specs = [

    SD.array_addunique(xattr_array, SD.MutationMacro.cas()),

]

try:

    collection.mutate_in(key, specs)

except InvalidArgumentException as ex:

    print(ex)

InvalidArgumentException(<ec=3, category=couchbase.common, message=invalid_argument (3), context=SubdocumentErrorContext({'last_dispatched_to': '192.168.107.130:11210', 'last_dispatched_from': '192.168.107.1:60895', 'retry_attempts': 0, 'key': 'test_doc', 'bucket_name': 'default', 'scope_name': '_default', 'collection_name': '_default', 'opaque': 9, 'status_code': 4, 'error_map_info': {'code': 4, 'name': 'EINVAL', 'description': 'Invalid packet', 'attributes': {9, 2}}, 'extended_error_info': {'reference': '', 'context': 'Request flags invalid'}, 'context_type': 'SubdocumentErrorContext'}), C Source=/Users/jaredcasey/GIT/couchbase/clients/python/couchbase-python-client/src/subdoc_ops.cxx:516>)

InvalidArgumentException(<ec=3, category=couchbase.common, message=invalid_argument (3), context=SubdocumentErrorContext({'last_dispatched_to': '192.168.107.130:11210', 'last_dispatched_from': '192.168.107.1:60895', 'retry_attempts': 0, 'key': 'test_doc', 'bucket_name': 'default', 'scope_name': '_default', 'collection_name': '_default', 'opaque': 11, 'status_code': 4, 'error_map_info': {'code': 4, 'name': 'EINVAL', 'description': 'Invalid packet', 'attributes': {9, 2}}, 'extended_error_info': {'reference': '', 'context': 'Request flags invalid'}, 'context_type': 'SubdocumentErrorContext'}), C Source=/Users/jaredcasey/GIT/couchbase/clients/python/couchbase-python-client/src/subdoc_ops.cxx:516>)