@Test
    public void testFailUponIllegalValue() {
        verifyIllegalValue("i notAnInt");
        verifyIllegalValue("i 3.0");

        verifyIllegalValue("d noDouble");
        verifyIllegalValue("d 3.0.");

        // verifyIllegalValue("b notTrueOrFalse");
        //verifyIllegalValue("b 1");
        //verifyIllegalValue("b 0");

        verifyIllegalValue("e undeclaredEnumValue");
        verifyIllegalValue("e 0");
    }
Verifies that an exception is thrown when one attempts to set an
illegal config value for parameters that have default values.
config/src/test/java/com/yahoo/config/subscription/ConfigInstanceTest.java