@Test
    public void testNotEquals() {
        Metadata meta1 = new Metadata();
        meta1.add("key", "value1");
        meta1.add("key", "value2");
        meta1.add("key2", "value12");

        Metadata meta2 = new Metadata();
        meta2.add("key", "value1");
        meta2.add("key", "value2");
        meta2.add("key2", "value22");

        assertFalse(meta1.equals(meta2));
    }
Defines a composite property, then checks that when set as the
composite the value can be retrieved with the property or the aliases
tika-core/src/test/java/org/apache/tika/metadata/TestMetadata.java