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Java

Tests passing locally but failing on upload

Hi, All my tests are passing in the code but when I submit the submissions zip file it says tests have failed. there are no details of the failure provided os I can't see what I need to fix as in my local copy they all pass.

I added the code;

    // TODO: Print out each of the chipmunks using the forEach method on Iterable
    Consumer<String> printOut = chipmunk -> System.out.printf("%s!\n", chipmunk);
    chipmunks.forEach(printOut);