Method shouldAllBeNull

test/org/apache/pig/data/TestSchemaTuple.java:387–396

This ensures that a fresh Tuple out of a TupleFactory will be full of null fields. @param tf a TupleFactory @throws ExecException

(SchemaTupleFactory tf)

     * @throws  ExecException
     */
    private void shouldAllBeNull(SchemaTupleFactory tf) throws ExecException {
        Tuple t = tf.newTuple();
        for (Object o : t) {
            assertNull(o);
        }
        for (int i = 0; i < t.size(); i++) {
            assertNull(t.get(i));
            assertTrue(t.isNull(i));
        }
    }

    private void fillWithData(SchemaTuple<?> st) throws ExecException {
        Schema udfSchema = st.getSchema();