I believe the unit test is wrong (even if it would no cause any real …

…world problems to be off by one here) because the timeframe begins yesterday, not today.

tests/php/Repository/BookingCodesTest.php

@@ -161,7 +161,7 @@ public function testGetCodes() {
 		//test infinite booking days timeframes
 		BookingCodes::generate( $this->timeframeWithoutEndDate, self::ADVANCE_GENERATION_DAYS );
 		//now we should get all codes for the max generation days
-		$codeAmount = BookingCodes::ADVANCE_GENERATION_DAYS + 1;
+		$codeAmount = BookingCodes::ADVANCE_GENERATION_DAYS + 2; // (timeframe begins yesterday): yesterday + today + ADVANCE_GENERATION_DAYS
 		$codes = BookingCodes::getCodes( $this->timeframeWithoutEndDate->ID, self::ADVANCE_GENERATION_DAYS);
 		$this->assertNotEmpty( $codes );
 		$this->assertCount( $codeAmount, $codes );