ItemUpdater has the normal rules. Brie, backstage passes and Sulfuras
subclass it and override only what differs. GildedRose picks the right
one through updater_for. Tests and approved output unchanged.
No behaviour change. Named the item strings and the 0/50 bounds, moved
the body into _update_item and return early for Sulfuras so the rest of
the ladder only deals with items that actually change.
One test per rule from the requirements, replacing test_foo. Tier
boundaries are checked on both sides, e.g. backstage passes at 11 and 10,
so an off-by-one can't slip through. All pass against the original code
with 100% branch coverage.
Approved the 30 day fixture output as-is so there is a baseline before
refactoring. Conjured Mana Cake is still wrong here, that changes later.
The approval test was also crashing with "no reporter configuration"
instead of showing a diff. pytest-approvaltests 0.2.4 doesn't work with
approvaltests 19, so pass PythonNativeReporter directly.
uzairarslan