Testing Google Apps Script web app with QUnit

Question

I have a Google Apps Script web app, that previously worked, but when I tried to add some code to the "server-side", it broke the app. I wish to go back in and do some unit testing and possibly a bit of regression testing (even though my manual regression testing just failed), on the different functions and modules of this app.

I stumbled upon this library for GAS unit testing and a tutorial for using the library. Problem is that, to actually see the results of the test, you must implement a function doGet(e) for testing.

This app I'm trying to unit-test, being a web app, already has that function. Its implementation is as follows:

function doGet(e) {
  return HtmlService.createTemplateFromFile(
    'potholeMap'
  ).evaluate()
   .setTitle('Pothole Map')
   .setSandboxMode(HtmlService.SandboxMode.IFRAME);
}

When I bring in the QUnit library dependency, and refactor it to allow QUnit testing, such as below:

function doGet(e) {
    var TESTING = true; 
    if (TESTING)
    {
        QUnit.urlParams(e.parameter);
        QUnit.load(function test() {});
        return QUnit.getHtml();
    }

    return HtmlService.createTemplateFromFile(
        'potholeMap'
    ).evaluate()
        .setTitle('Pothole Map')
        .setSandboxMode(HtmlService.SandboxMode.IFRAME);
}

I get this error when I try to run it: Authorization is required to perform that action. How do I fix this so that I can do unit testing in the project, as well as run it as web app?

Answer 1

I didn't know that, when I add library, I have to re-authorize the code. That is done via running a function, clicking the button with text like "Authorize", and following the popup prompt to authorize the app. (If only I knew how to verify this app, but that is another question...)