I know, I just mean you can remove infinite there.

The image is just an example to understand requirements.
All other constraints of the parameters are described on the description.

Why imagine an infinite grid if coordinates are finite?

It's been a while. The image is now uploaded

Sorry for the delay, the image is now uploaded

Without picture, it's impossible to figure out the specs

The image in the description is dead.

Random tests are useless as seen here.

'currency' table does not exist. Please fix your kata or remove it

You should improve the instructions, they're not clear at all.

"You have table CURRENCY with fields id, currency_name, currency_value, currency_date_update"

There is no "id" field in the table

Poorly written instructions

The dataset is not random.

In this special case, rounding might work ( because you're not actually using floating point numbers, you're using fixed point numbers ).

But in general, rounding is not the solution, comparing with an error margin is. That's what Test.assertApproxEquals is for. ( No, it's undocumented except here and there in the comments. )

For next time. :]

Ok, marking resolved.