[MO-java-users] Re: [MO-java-dev] Multiple method calls in any order?

[Steve F. <st...@m3...>]

Barry Kaplan wrote:
> Steve Freeman wrote:
> I'm still a bit confused. Consider:
> 
> public void class QuantityHolder {
>   public int getQuantity(Key key1, Key key1);
> }
> 
> public int sum(QuantityHolder holder) {
>   int result = holder.getQuantity("key1", "key2") + 
> holder.getQuantity("key3", "key4") + ...;
> }
> 
> I want to mock QuantityHolder. I want to ensure that sum() invoked the 
> getQuantity method twice, with the correct keys, but in any order.


depends on quite what you want to test, for example:

ExpectationSet keys;
public int getQuantity(Key key1, Key key2) {
   keys.addActual(key1);
   keys.addActual(key2);
}

would test that all four keys were used, but not the combinations. In 
practice, would that satisfy you that you'd covered the bases?

alternatively, how about a constraint:
   P.or(
     P.and(P.eq("key1"), P.eq("key2")),
     P.and(P.eq("key3"), P.eq("key4")));

which tests that only the right combinations are passed through.

If the arguments are always in the same order, you could try:

ExpectationSet keys;
public int getQuantity(Key key1, Key key2) {
   keys.addActual(key1 + key2);
}

Finally, if the arguments can come in any order but the pairs matter, I 
think you could try:

ExpectationSet keys;
public int getQuantity(Key key1, Key key2) {
   Set keySet = new HashSet();
   keySet.add(key1);
   keySet.add(key2);
   keys.addActual(keySet);
}

> I don't see how the ExpectationSet can do this. How to specify the mock 
> return value for each key1/key2 combination? Can I use the Constraints 
> with ExpectationSet (for mulitple arguments)?

We're still thinking about this one, but it's an obvious direction to go.

> 
> -bk
> 
> BTW, are there any other examples floating around (ie, projects that 
> make extensive use of mockobjects)? The ones the distribution are ok, 
> but not too extensive.

not sure, but you could contribute some...

S.