How do I use OCMockito to capture argument with primitive values?
MKTArgumentCaptor seems to be able to capture only object types? Xcode says "Incompatible pointer to integer conversion".
For primitive arguments, you have to do a little dance. Let's say we mocked NSMutableArray and wanted to verify calls to
- (void)replaceObjectAtIndex:(NSUInteger)index withObject:(id)anObject;
Instead of
[verify(mockArray) replaceObjectAtIndex:[argument capture] withObject:anything()];
which gives you the type conflict, we just have a dummy value (0 will do fine) but add an OCMockito call to override the matcher at a given argument index:
[[verify(mockArray) withMatcher:[argument capture] forArgument:0]
replaceObjectAtIndex:0 withObject:anything()];
The argument index for -withMatcher:forArgument: is 0-based for the first argument, so this says, "For the first argument, ignore whatever was passed in and use this matcher instead."
There is also a method -withMatcher: which just does this on the first argument, so this example could be simplified to
[[verify(mockArray) withMatcher:[argument capture]]
replaceObjectAtIndex:0 withObject:anything()];