How to test a feature with Chai/mocha?

Question

JavaScript

Good afternoon, I ran into a problem in testing function arguments.
You need to compare two function arguments. But it throws an error: "Assertion failed: False is expected to be a number or date."
What is the correct way to compare these arguments?

describe("TestingSelectChannel", function () {
 
  it("TVSelectChannelIsAboveThanPermitted", function () {
 
      assert.isAbove(tv.selectChannel(100), tv.selectChannel(99), "Can't be above");
 
    });
 
});

Answer 1

I don’t quite understand why to compare two arguments, if I didn’t understand something, please explain, but I would test this method in this way:

describe("selectChannel method", function () {
  const tv = new TV();
  tv.power();
 
  it("does not allow selecting channel above 98", function () {
      assert.isFalse(tv.selectChannel(100));
    });

  it("selects provided channel number if it matches requirements", function () {
      tv.selectChannel(88)
      assert.isEqual(tv._channel, 88);
    });
 
});