public function testTheLowerLimitIsTheFixedPointOfShrinking() { $generator = new DateGenerator($lowerLimit = new DateTime("2014-01-01T00:00:00"), new DateTime("2014-01-02T23:59:59")); $value = GeneratedValue::fromJustValue(new DateTime("2014-01-01T00:01:00"), 'date'); for ($i = 0; $i < 10; $i++) { $value = $generator->shrink($value); } $this->assertEquals($lowerLimit, $value->unbox()); }