@Test
public void parseMappingAddPrefix() {

    final Map<String, String> target = new HashMap<>();
    assertTrue(XmlNamespaceUtils.parseMappingAddPrefix("x=y", target));
    assertFalse(XmlNamespaceUtils.parseMappingAddPrefix("a", target));
    assertEquals("y", target.get("xmlns:x"));
    assertNull(target.get("xmlns:a"));
}