@Test
    void testRegexp() {
        QueryTree x = parseWhere("{ \"matches\" : [\"foo\", \"a b\"]}");
        Item root = x.getRoot();
        assertSame(RegExpItem.class, root.getClass());
        assertEquals("a b", ((RegExpItem) root).stringValue());
    }
Tests Query.Select

@author henrhoi
@author bratseth
container-search/src/test/java/com/yahoo/select/SelectTestCase.java