@Test
    void requireThatBooleanCanBeParsed() {
        assertParsesTo("true", "true");
        assertParsesTo("false", "false");
        assertParsesTo("true or false", "true or false");
        assertParsesTo("false and true", "false and true");
    }
@author <a href="mailto:magnarn@yahoo-inc.com">Magnar Nedland</a>
predicate-search-core/src/test/java/com/yahoo/document/predicate/PredicateParserTest.java