transport_name = 'grpc'
def test_list_groups_pager(transport_name: str = "grpc"):
    client = GroupServiceClient(
        credentials=ga_credentials.AnonymousCredentials,
        transport=transport_name,
    )

    # Mock the actual call within the gRPC stub, and fake the request.
    with mock.patch.object(type(client.transport.list_groups), "__call__") as call:
        # Set the response to a series of pages.
        call.side_effect = (
            group_service.ListGroupsResponse(
                group=[
                    group.Group(),
                    group.Group(),
                    group.Group(),
                ],
                next_page_token="abc",
            ),
            group_service.ListGroupsResponse(
                group=[],
                next_page_token="def",
            ),
            group_service.ListGroupsResponse(
                group=[
                    group.Group(),
                ],
                next_page_token="ghi",
            ),
            group_service.ListGroupsResponse(
                group=[
                    group.Group(),
                    group.Group(),
                ],
            ),
            RuntimeError,
        )

        metadata = ()
        metadata = tuple(metadata) + (
            gapic_v1.routing_header.to_grpc_metadata((("name", ""),)),
        )
        pager = client.list_groups(request={})

        assert pager._metadata == metadata

        results = list(pager)
        assert len(results) == 6


      assert all(isinstance(i, group.Group) for i in results)


E           assert False

E            +  where False = all(<generator object test_list_groups_pager.. at 0x7f44f3185550>)
tests/unit/gapic/monitoring_v3/test_group_service.py:923: AssertionError