def deploy_service_registry_and_set_urls(
    private_keys, web3, contract_manager, service_registry_address
) -> Tuple[ServiceRegistry, List[str]]:
    urls = ["http://foo", "http://boo", "http://coo"]
    c1_client = JSONRPCClient(web3, private_keys[0])
    c1_service_proxy = ServiceRegistry(
        jsonrpc_client=c1_client,
        service_registry_address=service_registry_address,
        contract_manager=contract_manager,
    )
    c2_client = JSONRPCClient(web3, private_keys[1])
    c2_service_proxy = ServiceRegistry(
        jsonrpc_client=c2_client,
        service_registry_address=service_registry_address,
        contract_manager=contract_manager,
    )
    c3_client = JSONRPCClient(web3, private_keys[2])
    c3_service_proxy = ServiceRegistry(
        jsonrpc_client=c3_client,
        service_registry_address=service_registry_address,
        contract_manager=contract_manager,
    )

    # Test that getting a random service for an empty registry returns None
    pfs_address = get_random_service(c1_service_proxy, "latest")
    assert pfs_address is None

    # Test that setting the urls works
    c1_service_proxy.set_url(urls[0])
    c2_service_proxy.set_url(urls[1])
    c3_service_proxy.set_url(urls[2])

    return c1_service_proxy, urls
def cell_edited_callback(self, text_cell, path, new_text):
        """If a backend name is changed, it saves the changes in the Backend

        @param text_cell: not used. The Gtk.CellRendererText that emitted the
                          signal. Only here because it's passed by the signal
        @param path: the Gtk.TreePath of the edited cell
        @param new_text: the new name of the backend
        """
        # we strip everything not permitted in backend names
        new_text = ''.join(c for c in new_text if (c.isalnum() or c in [" ", "-", "_"]))
        selected_iter = self.liststore.get_iter(path)
        # update the backend name
        backend_id = self.liststore.get_value(selected_iter,
                                              self.COLUMN_BACKEND_ID)
        backend = self.dialog.get_requester().get_backend(backend_id)
        if backend:
            backend.set_human_name(new_text)
            # update the text in the liststore
            self.liststore.set(selected_iter, self.COLUMN_TEXT, new_text)