The test hardcoded 4-18 August 2026, which was in the future when it was
written and is now in the past. The pill only renders for the active or
next range, so the assertion started failing purely because the calendar
moved on — the production code was never wrong.
Anchor the range on next month (days 4-18, so it never straddles a month
boundary) and assert against rangoFechasCorto, the same pure formatter the
widget uses, so the test checks that the pill is rendered rather than
restating the formatter's own output.
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