I can not understand why it can’t pass test #9, #12, #13 and #14. When I make calculations by myself, answer is same like in the test, but when run it througth test, it is failed.
Please give me some hint where I missed problem.
it pass perfecly (16/16 Passed) when I tested the codepen that you provided it
try: test it with other bowser or in local terminal.
Thank you for your comment!
Now it can pass because with a help of people from the stackoverflow website, I solved this problem.
The problem was that calculator had wrong id’s for ‘+’ and ‘-’ buttons The tests are using the button id to press it, not its text.
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