def test_update_field(self):
        # Setup Expected Response
        name = "name3373707"
        expected_response = {"name": name}
        expected_response = field_pb2.Field(**expected_response)
        operation = operations_pb2.Operation(
            name="operations/test_update_field", done=True)
        operation.response.Pack(expected_response)

        # Mock the API response
        channel = ChannelStub(responses=[operation])
        patch = mock.patch("google.api_core.grpc_helpers.create_channel")
        with patch as create_channel:
            create_channel.return_value = channel
            client = firestore_admin_v1.FirestoreAdminClient()

        # Setup Request
        field = {}

        response = client.update_field(field)
        result = response.result()
        assert expected_response == result

        assert len(channel.requests) == 1
        expected_request = firestore_admin_pb2.UpdateFieldRequest(field=field)
        actual_request = channel.requests[0][1]
        assert expected_request == actual_request
    def update_field(
        self,
        field,
        update_mask=None,
        retry=google.api_core.gapic_v1.method.DEFAULT,
        timeout=google.api_core.gapic_v1.method.DEFAULT,
        metadata=None,
    ):
        """
        Updates a field configuration. Currently, field updates apply only to
        single field index configuration. However, calls to
        ``FirestoreAdmin.UpdateField`` should provide a field mask to avoid
        changing any configuration that the caller isn't aware of. The field
        mask should be specified as: ``{ paths: "index_config" }``.

        This call returns a ``google.longrunning.Operation`` which may be used
        to track the status of the field update. The metadata for the operation
        will be the type ``FieldOperationMetadata``.

        To configure the default field settings for the database, use the
        special ``Field`` with resource name:
        ``projects/{project_id}/databases/{database_id}/collectionGroups/__default__/fields/*``.

        Example:
            >>> from google.cloud import firestore_admin_v1
            >>>
            >>> client = firestore_admin_v1.FirestoreAdminClient()
            >>>
            >>> # TODO: Initialize `field`:
            >>> field = {}
            >>>
            >>> response = client.update_field(field)

        Args:
            field (Union[dict, ~google.cloud.firestore_admin_v1.types.Field]): Required. The field to be updated.

                If a dict is provided, it must be of the same form as the protobuf
                message :class:`~google.cloud.firestore_admin_v1.types.Field`
            update_mask (Union[dict, ~google.cloud.firestore_admin_v1.types.FieldMask]): A mask, relative to the field. If specified, only configuration
                specified by this field\_mask will be updated in the field.

                If a dict is provided, it must be of the same form as the protobuf
                message :class:`~google.cloud.firestore_admin_v1.types.FieldMask`
            retry (Optional[google.api_core.retry.Retry]):  A retry object used
                to retry requests. If ``None`` is specified, requests will
                be retried using a default configuration.
            timeout (Optional[float]): The amount of time, in seconds, to wait
                for the request to complete. Note that if ``retry`` is
                specified, the timeout applies to each individual attempt.
            metadata (Optional[Sequence[Tuple[str, str]]]): Additional metadata
                that is provided to the method.

        Returns:
            A :class:`~google.cloud.firestore_admin_v1.types.Operation` instance.

        Raises:
            google.api_core.exceptions.GoogleAPICallError: If the request
                    failed for any reason.
            google.api_core.exceptions.RetryError: If the request failed due
                    to a retryable error and retry attempts failed.
            ValueError: If the parameters are invalid.
        """
        # Wrap the transport method to add retry and timeout logic.
        if "update_field" not in self._inner_api_calls:
            self._inner_api_calls[
                "update_field"] = google.api_core.gapic_v1.method.wrap_method(
                    self.transport.update_field,
                    default_retry=self._method_configs["UpdateField"].retry,
                    default_timeout=self._method_configs["UpdateField"].
                    timeout,
                    client_info=self._client_info,
                )

        request = firestore_admin_pb2.UpdateFieldRequest(
            field=field, update_mask=update_mask)
        if metadata is None:
            metadata = []
        metadata = list(metadata)
        try:
            routing_header = [("field.name", field.name)]
        except AttributeError:
            pass
        else:
            routing_metadata = google.api_core.gapic_v1.routing_header.to_grpc_metadata(
                routing_header)
            metadata.append(routing_metadata)

        return self._inner_api_calls["update_field"](request,
                                                     retry=retry,
                                                     timeout=timeout,
                                                     metadata=metadata)