### Question:
OidsUtil { public static String oidToAttributeName(Category category, String oid) { Assert.checkNotNullParam("category", category); Assert.checkNotNullParam("oid", oid); return oidToAttributeNameTable.get(category).get(oid); }  static String attributeNameToOid(Category category, String attributeName); static String oidToAttributeName(Category category, String oid);  }### Answer:
@Test public void testOidToAttributeName() throws Exception { Assert.assertEquals("ST", OidsUtil.oidToAttributeName(OidsUtil.Category.RDN, "2.5.4.8")); }