public function test_rfc1123_basics() { $this->assertEquals(DateTimeFormatter::RFC_1123_DATE_TIME()->getChronology(), IsoChronology::INSTANCE()); $this->assertEquals(DateTimeFormatter::RFC_1123_DATE_TIME()->getZone(), null); $this->assertEquals(DateTimeFormatter::RFC_1123_DATE_TIME()->getResolverStyle(), ResolverStyle::SMART()); }