Can I test (junit) default case of switch-case statement ?

Hi,
I have a class which has switch-case statements and I am trying to junit test with 100% coverage. My switch-case workes based on enum values.
say my enum values are 1, 2.
switch(getEnumValues) {
case 1:
return "some value";
case 2:
return "some value";
default:
throw new UnsupportedOperationException("No such enum value supported.");
I have test case to test the case 1 and 2 but I am not able to test default case. Can anyone please let me know how can I right a junit test case for default case.
Edited by: TUIJAVADEV on Nov 4, 2008 4:15 PM

yawmark wrote:
TUIJAVADEV wrote:
I have test case to test the case 1 and 2 but I am not able to test default case. Can anyone please let me know how can I right a junit test case for default case.If your enum values are ONE and TWO, and you have cases for both, then there is no "default case". There is nothing to test.
~If I'm reading the OP correctly, they're 1 and 2, not ONE and TWO. That is, not values of a Java enum.
If this is the case, then the easiest way to test the default case is to break the swtich out into a separate, package-accessible method that takes and arg and passes that onto the switch. (There may be variations on this, depending on how your code is structured.)
However, in a similar vein to what the others are saying, if you already know that you'll only ever have 1 and 2 by the time you get to the switch (maybe because the value comes from an argument to the enclosing method, and you've already unit tested that it appropriately throws an IllegalArgumentException when other values are passed, then there's no need to test the default.
Finally, though if it is ints 1 and 2, rather than a true enum, why not switch to an enum?

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do
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case 1:
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case 2:
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break;
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yawmark wrote:
TUIJAVADEV wrote:
I have test case to test the case 1 and 2 but I am not able to test default case. Can anyone please let me know how can I right a junit test case for default case.If your enum values are ONE and TWO, and you have cases for both, then there is no "default case". There is nothing to test.
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Message was edited by:
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Message was edited by:
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Can I test (junit) default case of switch-case statement ?

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