test() - function with parameter

[tho-gru-38]

I am working on a module to write tests and handle errors in a JavaScript class.

In the tests sections I have a lot of

let terminateCollectionRun = 0;
  
test("assigning var1", function() {
  terminateCollectionRun++;
  const value = jsonResponse.prop1;
  expect(value).to.not.equal("");
  expect(value).to.not.be.null;
  expect(value).to.not.be.undefined;
  bru.setVar("var1", value);
  terminateCollectionRun--;
});

test("assigning var2", function() {
  terminateCollectionRun++;
  const value = jsonResponse.prop2;
  expect(value).to.not.equal("");
  expect(value).to.not.be.null;
  expect(value).to.not.be.undefined;
  bru.setVar("var2", value);
  terminateCollectionRun--;
});

if (terminateCollectionRun > 0) {
  test("abroting collection run", function() {
    throw new Error("Termination of collection run is forced by previous error (count = "+terminateCollectionRun+")");
  });
  bru.setNextRequest(null)
}

I want to have a simpler api like:

const AssignVariable = require("./.../assignVariable.js");
const assignVariable = new AssignVariable();        /* create instance */
  
assignVariable.testedAssign("var1", function() {return jsonResponse.prop1;});
assignVariable.testedAssign("var2", function() {return jsonResponse.prop2;});

assignVariable.handleErrors();

The current implementation looks like this:

class AssignVariable {

    terminateRun;

    constructor() {
        this.terminateRun = 0;
    }

    testedAssign(name, valueFunction) {
        test("assigning " + name, function (obj = this) {
            obj.terminateRun++;
            const value = valueFunction();
            expect(value).to.not.equal("");
            expect(value).to.not.be.null;
            expect(value).to.not.be.undefined;
            bru.setVar(name, value);
            obj.terminateRun--;
        });
    }

    handleErrors() {
        console.log("***** a", this.terminateRun);
        if (this.terminateRun > 0) {
            test("abroting collection run", function (obj = this) {
                throw new Error(`Termination of collection run is forced by previous error (count = ${obj.terminateRun})`);
            });
            bru.setNextRequest(null)
        }
    }
}

The problem with this code is that I can not access terminateRun within the anonymous function. Therefore I tried to pass the reference by using a parameter:

But for some reason this still does not work.

Are there any ideas how to access the property terminateRun within the anonymous function?

Kind Regards,
Thomas