tests are wrong: they look for an add function with diff params

description says input is always an array not including non integer or non float elements. test case passes just a string

Use Test.assert_equals

The author has been inactive since January 2014. As I see, many of old Ruby katas have have poor quality according to today's standards. I'm not sure if it makes more sense to fix or to retire them. (Btw. in Python this would be max 8kyu :))

@max30272 it really should. The description explicitly hands you the math to peform, so the kata boils down to two very basic "how do I X in ruby?" questions, and if your solution is more than 1 line you're doing something very wrong.

It should be 8 kyu. :(

Added various other dice to tests

Updated description and added sample and random tests

Re-ranked to 7 kyu

• description is contradictory with tests: "Inputs are always populated (non-empty) arrays" -- however, empty arrays are tested
• description poorly formatted
• no sample tests
• no random tests
• overrated -- this is max 7 kyu

Fixed

Too easy to be a 6kyu

The description is poorly formatted, introduces the problem in a somewhat awkward order (e.g., listing expected output before explaining what the input is), devotes way too much space to irrelevantly listing permutations which might mislead someone into thinking they're expected to return those, and there are no example tests to clarify what is expected.

At the very least, that long line (without breaks, making it even less readable) that reads:

all_possible_outcomes_of_multiple_trials(coin, 2) should == 4 all_possible_outcomes_of_multiple_trials(coin, 3) should == 8 all_possible_outcomes_of_multiple_trials(dice, 1) should == 6 all_possible_outcomes_of_multiple_trials(dice, 2) should == 36

should have been turned into example test cases and placed in the test section.

expect shouldn't be used on values that can be tested with equality. Use Test.assert_equals instead.