@Test
    public void testArc() throws Exception {
        /*
        This tests an email with ARC-* headers but that does not begin 
        with one, and was detected as HTML
        */
        List<Metadata> metadataList = getRecursiveMetadata("testRFC822-ARC");
        assertEquals(1, metadataList.size());
        assertEquals("message/rfc822", metadataList.get(0).get(Metadata.CONTENT_TYPE));

        //Also, test that this date has been parsed: Wed, 26 Jan 2022 09:14:37 +0100 (CET)
        assertTrue(metadataList.get(0).get(TikaCoreProperties.CREATED).startsWith("2022-01-"));
    }
TIKA-1222 When requested, ensure that the various attachments of
the mail come through properly as embedded resources
tika-parsers/tika-parsers-standard/tika-parsers-standard-modules/tika-parser-mail-module/src/test/java/org/apache/tika/parser/mail/RFC822ParserTest.java