code: function aliSendsFirstMessage() {
      return Promise.all([
          sendMessage(aliTestClient.client),
          expectAliQueryKeys()
              .then(expectAliClaimKeys)
              .then(expectAliSendMessageRequest),
      ]).spread(function(_, ciphertext) {
          return ciphertext;
      });
  }
docs: Ali sends a message, first claiming e2e keys. Set the expectations and
  check the results.
  
  @return {promise} which resolves to the ciphertext for Bob's device.