Test names pollute student namespace

[petertseng]

Currently, tests are on the top-level. This means their names can conflict with student names. For example, the student can't name anything cases since that's the name used to list the test cases.

We could move the tests inside a class or object.

This would require making the test functions shared (ahhh, that's the situation where they have to be shared, I was wondering in #14) - confirm that if moving them to a test class/object.

Currently there is an obstacle: ceylon.language.meta.model.TypeApplicationException "Cannot apply a member declaration with no container type: use memberApply" on an attempt to use parameters on a member. Apparently a fix is planned for 1.3.2 1.3.3 1.4.0 (See eclipse-archived/ceylon-sdk#635), so we may have to wait until then.

Thus, I believe this issue is unactionable as of Ceylon 1.3.3 (please notify in this issue if a newer Ceylon version comes out), but if there are alternative ways of solving this problem please say the word.

[petertseng]

Another possible option that may work today: Put the tests in a separate package. I'm a little reluctant to add another package for each exercise just for this, though.

[petertseng]

Update. 1.3.2 is released, but issue is still open. It has been bumped to 1.3.3.

[petertseng]

1.3.3 was released on August 21, but without the necessary change (verified not working in https://travis-ci.org/exercism/ceylon/builds/276053644). So it will have to wait until 1.4.0.