WeatherHelper | 天气帮手 - 天气预报微信小程序

First, the getWeather function is fetching Weatherbit API, so you must use await
on fetch function. In your code above, I think you use function WeatherHelper.inputPrompt() to fetch data, so the function will be:

you cannot use dataframes in RDD code (you use dataframes in days.foreach), th dataframes are null here as it only lives on the driver, but not on the executors

This is more of a scala import syntax issue. To import the methods(col,year) within the class/package function you have to use.

When you run your test is that the test suite make a request to your test server, and the code that handles the request in your test server makes another request to another host.

You do not get to see 'Weather data received body' because the request handled by your test server is not waiting for the request that the test server itself makes. addNewCityWeatherData has no callback and does not return a promise, so the code that calls it goes on its merry way without waiting for it to complete. You should modify it to allow for the calling code to wait for a result.

Also, I'm not seeing how the data from the request initiated by your test server is folded back into the request that comes from your test suite. You may have to add some code for that too, unless addWeatherDataToDB(city, data); is taking care of it automatically somehow.