@Test
    public void testContainsAll() {
        assertTrue(Seq.of(1, 2, 3).containsAll());
        assertTrue(Seq.of(1, 2, 3).containsAll(1));
        assertTrue(Seq.of(1, 2, 3).containsAll(1, 2));
        assertTrue(Seq.of(1, 2, 3).containsAll(1, 2, 3));
        assertFalse(Seq.of(1, 2, 3).containsAll(1, 2, 3, 4));
        assertFalse(Seq.of(1, 2, 3).containsAll(4));
        assertFalse(Seq.of(1, 2, 3).containsAll((Integer) null));
    }
@author Lukas Eder
@author Roman Tkalenko
jOOL-java-8/src/test/java/org/jooq/lambda/SeqTest.java