You saved my day ,thanks a lot!

Thanks to another comment, this is solved. The Kata description below is incorrect.

Any activities completed that are ranking 2 levels or more lower than the user's ranking will be ignored

A correct description would be:

Any activities completed that are ranking 2 levels or more lower than the user's ranking will be worth 1 point

Yes, JavaScript. I do get these failed tests (and others similar):

• After applying rank of -1 the progress was expected to be 21, but was actually 20
• After applying rank of 3 the progress was expected to be 61, but was actually 60

The class currently should do what the instructions describe, so I'm not sure what I am misunderstanding about the desired behaviour. Why should progress be 21, 61, 51, 91 etc. instead of 20, 60, 50, 90? What does this test look like?

Which language? If you're talking about JavaScript, there're no such tests or direct attributes manipulation.

After applying rank of -1 the progress was expected to be 21, but was actually 20

I am seeing this broken test. The only scenarios I can think of that should result in progress 21, are the following - but in these cases my class test suite passes.

user.rank = -2;
user.progress = 0;
for (let i=0; i<17; i++) { U.incProgress(-1); } // Complete 17 x -1 activities.
Test.assertEquals(user.rank, -1);               // Pass
Test.assertEquals(user.progress, 21);           // Pass

user.rank = -2;
user.progress = 1;
user.incProgress(-1);                           // Complete 2 x -1 activities
user.incProgress(-1);                           // starting from progress 1.
Test.assertEquals(user.rank, -2);               // Pass
Test.assertEquals(user.progress, 21);           // Pass

What am I missing here?

Removed comment, posted as issue instead of reply.

Thanks Hilary, Having several clans would work as well right? This field works as a comma separated list?