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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
This took way longer than I want to admit but I got it in the end, it gave a good challenge!
Another thank you from here as well. Test case should be showing in this one.
I had some trouble understanding why the last test case failed. It didn't help that it didn't show the phone number that was used in the test. We should add it as a message:
Test.assertEquals(validPhoneNumber("asdfad(123) 456-78904adsfs"), false, "asdfad(123) 456-78904adsfs");