familiar .then syntax can be used between test steps

TestStepsAreThenable.ts

const { BotTester } = require('bot-tester');
const { expect } = require('chai');

describe('Bot Tester', () => {
  it('can do arbitrary work between test steps', () => {
        let responseString = 'goodbye';

        bot.dialog('/', (session) => {
            // send only numbers for this test case ....
            session.send(responseString);
        });

        return new BotTester(bot)
            .sendMessageToBot('you say', 'goodbye')
            .then(() => responseString = 'hello')
            .sendMessageToBot('and i say', 'hello')
            .runTest();
    });
});