assertEquals(false, pdq.checkAndSet("", config));//$NON-NLS-1$
assertEquals(false, pdq.checkAndSet("dpi", config));//$NON-NLS-1$
assertEquals(false, pdq.checkAndSet("123DPI", config));//$NON-NLS-1$
assertEquals(false, pdq.checkAndSet("123", config));//$NON-NLS-1$
assertEquals(false, pdq.checkAndSet("sdfdpi", config));//$NON-NLS-1$