Now I also fixed the following things:

• Use snake case instead of camel case (both are kinda ok in the lua world though)
• The expected argument in busted is the first one.
• Removed redundant assertion messages, and instead added messages in the it section.
• Fixed the array generation code to have random size.

I also updated the solution to a much shorter one.

Restored the description and added math.randomseed to make random a bit more random.

Missing Lua example in the description.

The description is the same for all languages, so I don't see a reason to change it like this.