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How Do You Test a Method That Doesn't Return Anything?
JUnit Questions and Answers
(Continued from previous question...)
How Do You Test a Method That Doesn't Return Anything?
You need to follow the logic below to answer this question:
- If a method is not returning anything through the "return" statement (void method),
it may return data through its arguments. In this case, you can test the data returned in any argument.
- Else if a method is not returning any data through its arguments,
it may change values of its instance variables. In this case, you can test changes of any instance variables.
- Else if a method is not changing any instance variable,
it may change values of its class variables. In this case, you can test changes of any class variables.
- Else if a method is not changing any class variable,
it may change external resources. In this case, you can test changes of any external resources.
- Else if a method is not changing any external resources,
it may just doing nothing but holding the thread in a waiting status.
In this case, you can test this waiting condition.
- Else if a method is not holding the thread in waiting status,
then this method is really doing nothing.
In this case, there is no need to test this method. :-)
(Continued on next question...)
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