[rubygems/rubygems] Rewrite GemVersionPromoter specs

Add tests for pre, move more of the setup into a helper method, and
restructure tests.

There seem to be five considerations for these tests (level, pre, strict,
locked, and whether the current version is a prerelease version, though
the last one overlaps with pre and didn't seem to behave how I expected
under test). Rather than write out the 16 (/32 if the last consideration
is real) combinations, I wrote most with independent tests for each
value. The existing combined tests were maintained (level vs strict)
because these seem the most interrelated.

https://github.com/rubygems/rubygems/commit/74c23a91b2

0 files changed, 0 insertions, 0 deletions