# -*- coding: utf-8 -*-
#
# Copyright 2018 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Unit tests."""

import pytest

from google.rpc import status_pb2

from google.cloud import bigtable_admin_v2
from google.cloud.bigtable_admin_v2 import enums
from google.cloud.bigtable_admin_v2.proto import bigtable_instance_admin_pb2
from google.cloud.bigtable_admin_v2.proto import instance_pb2
from google.iam.v1 import iam_policy_pb2
from google.iam.v1 import policy_pb2
from google.longrunning import operations_pb2
from google.protobuf import empty_pb2
from google.protobuf import field_mask_pb2


class MultiCallableStub(object):
    """Stub for the grpc.UnaryUnaryMultiCallable interface."""

    def __init__(self, method, channel_stub):
        self.method = method
        self.channel_stub = channel_stub

    def __call__(self, request, timeout=None, metadata=None, credentials=None):
        self.channel_stub.requests.append((self.method, request))

        response = None
        if self.channel_stub.responses:
            response = self.channel_stub.responses.pop()

        if isinstance(response, Exception):
            raise response

        if response:
            return response


class ChannelStub(object):
    """Stub for the grpc.Channel interface."""

    def __init__(self, responses=[]):
        self.responses = responses
        self.requests = []

    def unary_unary(self,
                    method,
                    request_serializer=None,
                    response_deserializer=None):
        return MultiCallableStub(method, self)


class CustomException(Exception):
    pass


class TestBigtableInstanceAdminClient(object):
    def test_create_instance(self):
        # Setup Expected Response
        name = 'name3373707'
        display_name = 'displayName1615086568'
        expected_response = {'name': name, 'display_name': display_name}
        expected_response = instance_pb2.Instance(**expected_response)
        operation = operations_pb2.Operation(
            name='operations/test_create_instance', done=True)
        operation.response.Pack(expected_response)

        # Mock the API response
        channel = ChannelStub(responses=[operation])
        client = bigtable_admin_v2.BigtableInstanceAdminClient(channel=channel)

        # Setup Request
        parent = client.project_path('[PROJECT]')
        instance_id = 'instanceId-2101995259'
        instance = {}
        clusters = {}

        response = client.create_instance(parent, instance_id, instance,
                                          clusters)
        result = response.result()
        assert expected_response == result

        assert len(channel.requests) == 1
        expected_request = bigtable_instance_admin_pb2.CreateInstanceRequest(
            parent=parent,
            instance_id=instance_id,
            instance=instance,
            clusters=clusters)
        actual_request = channel.requests[0][1]
        assert expected_request == actual_request

    def test_create_instance_exception(self):
        # Setup Response
        error = status_pb2.Status()
        operation = operations_pb2.Operation(
            name='operations/test_create_instance_exception', done=True)
        operation.error.CopyFrom(error)

        # Mock the API response
        channel = ChannelStub(responses=[operation])
        client = bigtable_admin_v2.BigtableInstanceAdminClient(channel=channel)

        # Setup Request
        parent = client.project_path('[PROJECT]')
        instance_id = 'instanceId-2101995259'
        instance = {}
        clusters = {}

        response = client.create_instance(parent, instance_id, instance,
                                          clusters)
        exception = response.exception()
        assert exception.errors[0] == error

    def test_get_instance(self):
        # Setup Expected Response
        name_2 = 'name2-1052831874'
        display_name = 'displayName1615086568'
        expected_response = {'name': name_2, 'display_name': display_name}
        expected_response = instance_pb2.Instance(**expected_response)

        # Mock the API response
        channel = ChannelStub(responses=[expected_response])
        client = bigtable_admin_v2.BigtableInstanceAdminClient(channel=channel)

        # Setup Request
        name = client.instance_path('[PROJECT]', '[INSTANCE]')

        response = client.get_instance(name)
        assert expected_response == response

        assert len(channel.requests) == 1
        expected_request = bigtable_instance_admin_pb2.GetInstanceRequest(
            name=name)
        actual_request = channel.requests[0][1]
        assert expected_request == actual_request

    def test_get_instance_exception(self):
        # Mock the API response
        channel = ChannelStub(responses=[CustomException()])
        client = bigtable_admin_v2.BigtableInstanceAdminClient(channel=channel)

        # Setup request
        name = client.instance_path('[PROJECT]', '[INSTANCE]')

        with pytest.raises(CustomException):
            client.get_instance(name)

    def test_list_instances(self):
        # Setup Expected Response
        next_page_token = 'nextPageToken-1530815211'
        expected_response = {'next_page_token': next_page_token}
        expected_response = bigtable_instance_admin_pb2.ListInstancesResponse(
            **expected_response)

        # Mock the API response
        channel = ChannelStub(responses=[expected_response])
        client = bigtable_admin_v2.BigtableInstanceAdminClient(channel=channel)

        # Setup Request
        parent = client.project_path('[PROJECT]')

        response = client.list_instances(parent)
        assert expected_response == response

        assert len(channel.requests) == 1
        expected_request = bigtable_instance_admin_pb2.ListInstancesRequest(
            parent=parent)
        actual_request = channel.requests[0][1]
        assert expected_request == actual_request

    def test_list_instances_exception(self):
        # Mock the API response
        channel = ChannelStub(responses=[CustomException()])
        client = bigtable_admin_v2.BigtableInstanceAdminClient(channel=channel)

        # Setup request
        parent = client.project_path('[PROJECT]')

        with pytest.raises(CustomException):
            client.list_instances(parent)

    def test_update_instance(self):
        # Setup Expected Response
        name_2 = 'name2-1052831874'
        display_name_2 = 'displayName21615000987'
        expected_response = {'name': name_2, 'display_name': display_name_2}
        expected_response = instance_pb2.Instance(**expected_response)

        # Mock the API response
        channel = ChannelStub(responses=[expected_response])
        client = bigtable_admin_v2.BigtableInstanceAdminClient(channel=channel)

        # Setup Request
        name = client.instance_path('[PROJECT]', '[INSTANCE]')
        display_name = 'displayName1615086568'
        type_ = enums.Instance.Type.TYPE_UNSPECIFIED
        labels = {}

        response = client.update_instance(name, display_name, type_, labels)
        assert expected_response == response

        assert len(channel.requests) == 1
        expected_request = instance_pb2.Instance(
            name=name, display_name=display_name, type=type_, labels=labels)
        actual_request = channel.requests[0][1]
        assert expected_request == actual_request

    def test_update_instance_exception(self):
        # Mock the API response
        channel = ChannelStub(responses=[CustomException()])
        client = bigtable_admin_v2.BigtableInstanceAdminClient(channel=channel)

        # Setup request
        name = client.instance_path('[PROJECT]', '[INSTANCE]')
        display_name = 'displayName1615086568'
        type_ = enums.Instance.Type.TYPE_UNSPECIFIED
        labels = {}

        with pytest.raises(CustomException):
            client.update_instance(name, display_name, type_, labels)

    def test_partial_update_instance(self):
        # Setup Expected Response
        name = 'name3373707'
        display_name = 'displayName1615086568'
        expected_response = {'name': name, 'display_name': display_name}
        expected_response = instance_pb2.Instance(**expected_response)
        operation = operations_pb2.Operation(
            name='operations/test_partial_update_instance', done=True)
        operation.response.Pack(expected_response)

        # Mock the API response
        channel = ChannelStub(responses=[operation])
        client = bigtable_admin_v2.BigtableInstanceAdminClient(channel=channel)

        # Setup Request
        instance = {}
        update_mask = {}

        response = client.partial_update_instance(instance, update_mask)
        result = response.result()
        assert expected_response == result

        assert len(channel.requests) == 1
        expected_request = bigtable_instance_admin_pb2.PartialUpdateInstanceRequest(
            instance=instance, update_mask=update_mask)
        actual_request = channel.requests[0][1]
        assert expected_request == actual_request

    def test_partial_update_instance_exception(self):
        # Setup Response
        error = status_pb2.Status()
        operation = operations_pb2.Operation(
            name='operations/test_partial_update_instance_exception',
            done=True)
        operation.error.CopyFrom(error)

        # Mock the API response
        channel = ChannelStub(responses=[operation])
        client = bigtable_admin_v2.BigtableInstanceAdminClient(channel=channel)

        # Setup Request
        instance = {}
        update_mask = {}

        response = client.partial_update_instance(instance, update_mask)
        exception = response.exception()
        assert exception.errors[0] == error

    def test_delete_instance(self):
        channel = ChannelStub()
        client = bigtable_admin_v2.BigtableInstanceAdminClient(channel=channel)

        # Setup Request
        name = client.instance_path('[PROJECT]', '[INSTANCE]')

        client.delete_instance(name)

        assert len(channel.requests) == 1
        expected_request = bigtable_instance_admin_pb2.DeleteInstanceRequest(
            name=name)
        actual_request = channel.requests[0][1]
        assert expected_request == actual_request

    def test_delete_instance_exception(self):
        # Mock the API response
        channel = ChannelStub(responses=[CustomException()])
        client = bigtable_admin_v2.BigtableInstanceAdminClient(channel=channel)

        # Setup request
        name = client.instance_path('[PROJECT]', '[INSTANCE]')

        with pytest.raises(CustomException):
            client.delete_instance(name)

    def test_create_cluster(self):
        # Setup Expected Response
        name = 'name3373707'
        location = 'location1901043637'
        serve_nodes = 1288838783
        expected_response = {
            'name': name,
            'location': location,
            'serve_nodes': serve_nodes
        }
        expected_response = instance_pb2.Cluster(**expected_response)
        operation = operations_pb2.Operation(
            name='operations/test_create_cluster', done=True)
        operation.response.Pack(expected_response)

        # Mock the API response
        channel = ChannelStub(responses=[operation])
        client = bigtable_admin_v2.BigtableInstanceAdminClient(channel=channel)

        # Setup Request
        parent = client.instance_path('[PROJECT]', '[INSTANCE]')
        cluster_id = 'clusterId240280960'
        cluster = {}

        response = client.create_cluster(parent, cluster_id, cluster)
        result = response.result()
        assert expected_response == result

        assert len(channel.requests) == 1
        expected_request = bigtable_instance_admin_pb2.CreateClusterRequest(
            parent=parent, cluster_id=cluster_id, cluster=cluster)
        actual_request = channel.requests[0][1]
        assert expected_request == actual_request

    def test_create_cluster_exception(self):
        # Setup Response
        error = status_pb2.Status()
        operation = operations_pb2.Operation(
            name='operations/test_create_cluster_exception', done=True)
        operation.error.CopyFrom(error)

        # Mock the API response
        channel = ChannelStub(responses=[operation])
        client = bigtable_admin_v2.BigtableInstanceAdminClient(channel=channel)

        # Setup Request
        parent = client.instance_path('[PROJECT]', '[INSTANCE]')
        cluster_id = 'clusterId240280960'
        cluster = {}

        response = client.create_cluster(parent, cluster_id, cluster)
        exception = response.exception()
        assert exception.errors[0] == error

    def test_get_cluster(self):
        # Setup Expected Response
        name_2 = 'name2-1052831874'
        location = 'location1901043637'
        serve_nodes = 1288838783
        expected_response = {
            'name': name_2,
            'location': location,
            'serve_nodes': serve_nodes
        }
        expected_response = instance_pb2.Cluster(**expected_response)

        # Mock the API response
        channel = ChannelStub(responses=[expected_response])
        client = bigtable_admin_v2.BigtableInstanceAdminClient(channel=channel)

        # Setup Request
        name = client.cluster_path('[PROJECT]', '[INSTANCE]', '[CLUSTER]')

        response = client.get_cluster(name)
        assert expected_response == response

        assert len(channel.requests) == 1
        expected_request = bigtable_instance_admin_pb2.GetClusterRequest(
            name=name)
        actual_request = channel.requests[0][1]
        assert expected_request == actual_request

    def test_get_cluster_exception(self):
        # Mock the API response
        channel = ChannelStub(responses=[CustomException()])
        client = bigtable_admin_v2.BigtableInstanceAdminClient(channel=channel)

        # Setup request
        name = client.cluster_path('[PROJECT]', '[INSTANCE]', '[CLUSTER]')

        with pytest.raises(CustomException):
            client.get_cluster(name)

    def test_list_clusters(self):
        # Setup Expected Response
        next_page_token = 'nextPageToken-1530815211'
        expected_response = {'next_page_token': next_page_token}
        expected_response = bigtable_instance_admin_pb2.ListClustersResponse(
            **expected_response)

        # Mock the API response
        channel = ChannelStub(responses=[expected_response])
        client = bigtable_admin_v2.BigtableInstanceAdminClient(channel=channel)

        # Setup Request
        parent = client.instance_path('[PROJECT]', '[INSTANCE]')

        response = client.list_clusters(parent)
        assert expected_response == response

        assert len(channel.requests) == 1
        expected_request = bigtable_instance_admin_pb2.ListClustersRequest(
            parent=parent)
        actual_request = channel.requests[0][1]
        assert expected_request == actual_request

    def test_list_clusters_exception(self):
        # Mock the API response
        channel = ChannelStub(responses=[CustomException()])
        client = bigtable_admin_v2.BigtableInstanceAdminClient(channel=channel)

        # Setup request
        parent = client.instance_path('[PROJECT]', '[INSTANCE]')

        with pytest.raises(CustomException):
            client.list_clusters(parent)

    def test_update_cluster(self):
        # Setup Expected Response
        name_2 = 'name2-1052831874'
        location = 'location1901043637'
        serve_nodes_2 = 1623486220
        expected_response = {
            'name': name_2,
            'location': location,
            'serve_nodes': serve_nodes_2
        }
        expected_response = instance_pb2.Cluster(**expected_response)
        operation = operations_pb2.Operation(
            name='operations/test_update_cluster', done=True)
        operation.response.Pack(expected_response)

        # Mock the API response
        channel = ChannelStub(responses=[operation])
        client = bigtable_admin_v2.BigtableInstanceAdminClient(channel=channel)

        # Setup Request
        name = client.cluster_path('[PROJECT]', '[INSTANCE]', '[CLUSTER]')
        serve_nodes = 1288838783

        response = client.update_cluster(name, serve_nodes)
        result = response.result()
        assert expected_response == result

        assert len(channel.requests) == 1
        expected_request = instance_pb2.Cluster(
            name=name, serve_nodes=serve_nodes)
        actual_request = channel.requests[0][1]
        assert expected_request == actual_request

    def test_update_cluster_exception(self):
        # Setup Response
        error = status_pb2.Status()
        operation = operations_pb2.Operation(
            name='operations/test_update_cluster_exception', done=True)
        operation.error.CopyFrom(error)

        # Mock the API response
        channel = ChannelStub(responses=[operation])
        client = bigtable_admin_v2.BigtableInstanceAdminClient(channel=channel)

        # Setup Request
        name = client.cluster_path('[PROJECT]', '[INSTANCE]', '[CLUSTER]')
        serve_nodes = 1288838783

        response = client.update_cluster(name, serve_nodes)
        exception = response.exception()
        assert exception.errors[0] == error

    def test_delete_cluster(self):
        channel = ChannelStub()
        client = bigtable_admin_v2.BigtableInstanceAdminClient(channel=channel)

        # Setup Request
        name = client.cluster_path('[PROJECT]', '[INSTANCE]', '[CLUSTER]')

        client.delete_cluster(name)

        assert len(channel.requests) == 1
        expected_request = bigtable_instance_admin_pb2.DeleteClusterRequest(
            name=name)
        actual_request = channel.requests[0][1]
        assert expected_request == actual_request

    def test_delete_cluster_exception(self):
        # Mock the API response
        channel = ChannelStub(responses=[CustomException()])
        client = bigtable_admin_v2.BigtableInstanceAdminClient(channel=channel)

        # Setup request
        name = client.cluster_path('[PROJECT]', '[INSTANCE]', '[CLUSTER]')

        with pytest.raises(CustomException):
            client.delete_cluster(name)

    def test_create_app_profile(self):
        # Setup Expected Response
        name = 'name3373707'
        etag = 'etag3123477'
        description = 'description-1724546052'
        expected_response = {
            'name': name,
            'etag': etag,
            'description': description
        }
        expected_response = instance_pb2.AppProfile(**expected_response)

        # Mock the API response
        channel = ChannelStub(responses=[expected_response])
        client = bigtable_admin_v2.BigtableInstanceAdminClient(channel=channel)

        # Setup Request
        parent = client.instance_path('[PROJECT]', '[INSTANCE]')
        app_profile_id = 'appProfileId1262094415'
        app_profile = {}

        response = client.create_app_profile(parent, app_profile_id,
                                             app_profile)
        assert expected_response == response

        assert len(channel.requests) == 1
        expected_request = bigtable_instance_admin_pb2.CreateAppProfileRequest(
            parent=parent,
            app_profile_id=app_profile_id,
            app_profile=app_profile)
        actual_request = channel.requests[0][1]
        assert expected_request == actual_request

    def test_create_app_profile_exception(self):
        # Mock the API response
        channel = ChannelStub(responses=[CustomException()])
        client = bigtable_admin_v2.BigtableInstanceAdminClient(channel=channel)

        # Setup request
        parent = client.instance_path('[PROJECT]', '[INSTANCE]')
        app_profile_id = 'appProfileId1262094415'
        app_profile = {}

        with pytest.raises(CustomException):
            client.create_app_profile(parent, app_profile_id, app_profile)

    def test_get_app_profile(self):
        # Setup Expected Response
        name_2 = 'name2-1052831874'
        etag = 'etag3123477'
        description = 'description-1724546052'
        expected_response = {
            'name': name_2,
            'etag': etag,
            'description': description
        }
        expected_response = instance_pb2.AppProfile(**expected_response)

        # Mock the API response
        channel = ChannelStub(responses=[expected_response])
        client = bigtable_admin_v2.BigtableInstanceAdminClient(channel=channel)

        # Setup Request
        name = client.app_profile_path('[PROJECT]', '[INSTANCE]',
                                       '[APP_PROFILE]')

        response = client.get_app_profile(name)
        assert expected_response == response

        assert len(channel.requests) == 1
        expected_request = bigtable_instance_admin_pb2.GetAppProfileRequest(
            name=name)
        actual_request = channel.requests[0][1]
        assert expected_request == actual_request

    def test_get_app_profile_exception(self):
        # Mock the API response
        channel = ChannelStub(responses=[CustomException()])
        client = bigtable_admin_v2.BigtableInstanceAdminClient(channel=channel)

        # Setup request
        name = client.app_profile_path('[PROJECT]', '[INSTANCE]',
                                       '[APP_PROFILE]')

        with pytest.raises(CustomException):
            client.get_app_profile(name)

    def test_list_app_profiles(self):
        # Setup Expected Response
        next_page_token = ''
        app_profiles_element = {}
        app_profiles = [app_profiles_element]
        expected_response = {
            'next_page_token': next_page_token,
            'app_profiles': app_profiles
        }
        expected_response = bigtable_instance_admin_pb2.ListAppProfilesResponse(
            **expected_response)

        # Mock the API response
        channel = ChannelStub(responses=[expected_response])
        client = bigtable_admin_v2.BigtableInstanceAdminClient(channel=channel)

        # Setup Request
        parent = client.instance_path('[PROJECT]', '[INSTANCE]')

        paged_list_response = client.list_app_profiles(parent)
        resources = list(paged_list_response)
        assert len(resources) == 1

        assert expected_response.app_profiles[0] == resources[0]

        assert len(channel.requests) == 1
        expected_request = bigtable_instance_admin_pb2.ListAppProfilesRequest(
            parent=parent)
        actual_request = channel.requests[0][1]
        assert expected_request == actual_request

    def test_list_app_profiles_exception(self):
        channel = ChannelStub(responses=[CustomException()])
        client = bigtable_admin_v2.BigtableInstanceAdminClient(channel=channel)

        # Setup request
        parent = client.instance_path('[PROJECT]', '[INSTANCE]')

        paged_list_response = client.list_app_profiles(parent)
        with pytest.raises(CustomException):
            list(paged_list_response)

    def test_update_app_profile(self):
        # Setup Expected Response
        name = 'name3373707'
        etag = 'etag3123477'
        description = 'description-1724546052'
        expected_response = {
            'name': name,
            'etag': etag,
            'description': description
        }
        expected_response = instance_pb2.AppProfile(**expected_response)
        operation = operations_pb2.Operation(
            name='operations/test_update_app_profile', done=True)
        operation.response.Pack(expected_response)

        # Mock the API response
        channel = ChannelStub(responses=[operation])
        client = bigtable_admin_v2.BigtableInstanceAdminClient(channel=channel)

        # Setup Request
        app_profile = {}
        update_mask = {}

        response = client.update_app_profile(app_profile, update_mask)
        result = response.result()
        assert expected_response == result

        assert len(channel.requests) == 1
        expected_request = bigtable_instance_admin_pb2.UpdateAppProfileRequest(
            app_profile=app_profile, update_mask=update_mask)
        actual_request = channel.requests[0][1]
        assert expected_request == actual_request

    def test_update_app_profile_exception(self):
        # Setup Response
        error = status_pb2.Status()
        operation = operations_pb2.Operation(
            name='operations/test_update_app_profile_exception', done=True)
        operation.error.CopyFrom(error)

        # Mock the API response
        channel = ChannelStub(responses=[operation])
        client = bigtable_admin_v2.BigtableInstanceAdminClient(channel=channel)

        # Setup Request
        app_profile = {}
        update_mask = {}

        response = client.update_app_profile(app_profile, update_mask)
        exception = response.exception()
        assert exception.errors[0] == error

    def test_delete_app_profile(self):
        channel = ChannelStub()
        client = bigtable_admin_v2.BigtableInstanceAdminClient(channel=channel)

        # Setup Request
        name = client.app_profile_path('[PROJECT]', '[INSTANCE]',
                                       '[APP_PROFILE]')
        ignore_warnings = True

        client.delete_app_profile(name, ignore_warnings)

        assert len(channel.requests) == 1
        expected_request = bigtable_instance_admin_pb2.DeleteAppProfileRequest(
            name=name, ignore_warnings=ignore_warnings)
        actual_request = channel.requests[0][1]
        assert expected_request == actual_request

    def test_delete_app_profile_exception(self):
        # Mock the API response
        channel = ChannelStub(responses=[CustomException()])
        client = bigtable_admin_v2.BigtableInstanceAdminClient(channel=channel)

        # Setup request
        name = client.app_profile_path('[PROJECT]', '[INSTANCE]',
                                       '[APP_PROFILE]')
        ignore_warnings = True

        with pytest.raises(CustomException):
            client.delete_app_profile(name, ignore_warnings)

    def test_get_iam_policy(self):
        # Setup Expected Response
        version = 351608024
        etag = b'etag3123477'
        expected_response = {'version': version, 'etag': etag}
        expected_response = policy_pb2.Policy(**expected_response)

        # Mock the API response
        channel = ChannelStub(responses=[expected_response])
        client = bigtable_admin_v2.BigtableInstanceAdminClient(channel=channel)

        # Setup Request
        resource = client.instance_path('[PROJECT]', '[INSTANCE]')

        response = client.get_iam_policy(resource)
        assert expected_response == response

        assert len(channel.requests) == 1
        expected_request = iam_policy_pb2.GetIamPolicyRequest(
            resource=resource)
        actual_request = channel.requests[0][1]
        assert expected_request == actual_request

    def test_get_iam_policy_exception(self):
        # Mock the API response
        channel = ChannelStub(responses=[CustomException()])
        client = bigtable_admin_v2.BigtableInstanceAdminClient(channel=channel)

        # Setup request
        resource = client.instance_path('[PROJECT]', '[INSTANCE]')

        with pytest.raises(CustomException):
            client.get_iam_policy(resource)

    def test_set_iam_policy(self):
        # Setup Expected Response
        version = 351608024
        etag = b'etag3123477'
        expected_response = {'version': version, 'etag': etag}
        expected_response = policy_pb2.Policy(**expected_response)

        # Mock the API response
        channel = ChannelStub(responses=[expected_response])
        client = bigtable_admin_v2.BigtableInstanceAdminClient(channel=channel)

        # Setup Request
        resource = client.instance_path('[PROJECT]', '[INSTANCE]')
        policy = {}

        response = client.set_iam_policy(resource, policy)
        assert expected_response == response

        assert len(channel.requests) == 1
        expected_request = iam_policy_pb2.SetIamPolicyRequest(
            resource=resource, policy=policy)
        actual_request = channel.requests[0][1]
        assert expected_request == actual_request

    def test_set_iam_policy_exception(self):
        # Mock the API response
        channel = ChannelStub(responses=[CustomException()])
        client = bigtable_admin_v2.BigtableInstanceAdminClient(channel=channel)

        # Setup request
        resource = client.instance_path('[PROJECT]', '[INSTANCE]')
        policy = {}

        with pytest.raises(CustomException):
            client.set_iam_policy(resource, policy)

    def test_test_iam_permissions(self):
        # Setup Expected Response
        expected_response = {}
        expected_response = iam_policy_pb2.TestIamPermissionsResponse(
            **expected_response)

        # Mock the API response
        channel = ChannelStub(responses=[expected_response])
        client = bigtable_admin_v2.BigtableInstanceAdminClient(channel=channel)

        # Setup Request
        resource = client.instance_path('[PROJECT]', '[INSTANCE]')
        permissions = []

        response = client.test_iam_permissions(resource, permissions)
        assert expected_response == response

        assert len(channel.requests) == 1
        expected_request = iam_policy_pb2.TestIamPermissionsRequest(
            resource=resource, permissions=permissions)
        actual_request = channel.requests[0][1]
        assert expected_request == actual_request

    def test_test_iam_permissions_exception(self):
        # Mock the API response
        channel = ChannelStub(responses=[CustomException()])
        client = bigtable_admin_v2.BigtableInstanceAdminClient(channel=channel)

        # Setup request
        resource = client.instance_path('[PROJECT]', '[INSTANCE]')
        permissions = []

        with pytest.raises(CustomException):
            client.test_iam_permissions(resource, permissions)
