product tags + line item properties in shopify scripts

[bestrada]

https://mintandlily.com/products/mon-amour-name-necklace

I have a problem with my shopify scripts as it relies on product tags. I suspect that there is a problem with shopify scripts whenever line item properties are introduced. As noted in partner slack community, it is not possible to add line item properties in the script editor so I don't know how to test or produce useful logging to figure out what is wrong. How does Shopify recommend I troubleshoot my script.

Repro Steps:

1. Visit the ☝️ link above
2. Add one necklace to the cart, typing in "Test" as your personalization
3. Increase the quantity in the cart to 3
4. observe that the "Gift & Save" discount via shopify script applies
5. empty the cart
6. Add a necklace in one-at-a-time to the cart, each with a different personalization
7. observe that the "Gift & Save" discount is not applied

I feel uncomfortable pasting the source code of my script here publicly, but I am open troubleshooting this bug privately with Shopify.

[bestrada · Accepted solution]

Per Jake Olney's suggestion, I was able to troubleshoot my bug by assigning hard-coded properties in my script manually and find the bug. This problem is solved.