public void setOuterJoinType(OuterJoinType outerJoinType) {
        this.outerJoinType = outerJoinType;
    }
@Test
    void testFullOuterJoinWithoutMatchingPartners() throws Exception {
        final List<String> leftInput = Arrays.asList("foo", "bar", "foobar");
        final List<String> rightInput = Arrays.asList("oof", "rab", "raboof");
        baseOperator.setOuterJoinType(OuterJoinOperatorBase.OuterJoinType.FULL);
        List<String> expected =
                Arrays.asList(
                        "bar,null",
                        "foo,null",
                        "foobar,null",
                        "null,oof",
                        "null,rab",
                        "null,raboof");
        testOuterJoin(leftInput, rightInput, expected);
    }