What is the best way to perform an assertion for numbers that are off by ".1" in testcafe

Question

I need some assistance.This is a weird one.Basically I am writing out some testcafe tests where: a user goes to the order summary page and verifies that the total on the check out page matches the total on the order details page.

The issue: There are instances where the order details total is off by a penny(not a bug worthy of fixing any time soon. according to the developers).So for example, on the checkout page your order total is $3.50. On the order details page the total is $3.51

Is there a way to combat a penny extra in a testcafe assertion?

Here is what my assertion looks like:

await t
        .expect(totalOnCheckoutPage)
        .eql(totalOnOrderDetails);

totalOnCheckoutPage and totalOnOrderDetails are selector variables.

Answer 1

You can write custom util to round. Sample

 function round(x, precision) { var y = +x + (precision === undefined ? 0.5 : precision/2); return y - (y % (precision === undefined ? 1 : +precision)); } console.log(round(3.51, 0.1)) console.log(round(3.55, 0.1))

Ref: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/round

Answer 2

You can try Within assertion method

await t.expect(5).within(3, 10, 'this assertion will pass');

extract the inner text of both values, and add the needed round off range

https://devexpress.github.io/testcafe/documentation/test-api/assertions/assertion-api.html#within