@Test
    @SuppressWarnings("deprecation")
    public void testJoin() {
        assertEquals("123", Seq.of(1, 2, 3).join());
        assertEquals("1, 2, 3", Seq.of(1, 2, 3).join(", "));
        assertEquals("^1|2|3$", Seq.of(1, 2, 3).join("|", "^", "$"));
    }
@author Lukas Eder
@author Roman Tkalenko
jOOL-java-8/src/test/java/org/jooq/lambda/SeqTest.java