public void availTzCheck() throws GuacamoleException {
        for (String tzStr : TZ_AVAIL_IDS) {
            String tzId = WHERE_IN_WORLD.parseValue(tzStr).getID();
            assertNotNull(tzId);
            assertTrue(tzId.equals(tzStr));
        }
    }
Tests the list of available identifiers provided by the TimeZone class
to make sure that all identifiers provided pass through successfully and
do not yield unexpected results.

@throws GuacamoleException 
    If the test fails unexpectedly because the timezone is not recognized
    and is converted to GMT.
guacamole-ext/src/test/java/org/apache/guacamole/properties/TimeZoneGuacamolePropertyTest.java