}

    // Test getDefaultField and setDefaultField
    public void test_defaultField() {
        queryContext = new QueryContext("test", false);
        assertNull(queryContext.getDefaultField());

        queryContext.setDefaultField("custom_field");
        assertEquals("custom_field", queryContext.getDefaultField());

        queryContext.setDefaultField(null);
        assertNull(queryContext.getDefaultField());

        return defaultField;
    }

    /**
     * Sets the default field for this query context.
     * @param defaultField The default field name to set.
     */
    public void setDefaultField(final String defaultField) {
        this.defaultField = defaultField;
    }

    /**
     * Gets the set of highlighted query terms.