> [topic title] should be_instance_of([NSString class]);

> However the test fails with an error that <value and (__NSCFString)> is
> expected to be an instance of <NSString>

> What am I doing wrong?

> You're not doing anything wrong.  The issue is that creating an NSString
> doesn't actually ever return an NSString; it's a class cluster, and the
> actual instantiated class is decided by some super secret Apple algorithm.  

> If you try this

> [[NSString string] isMemberOfClass:[NSString class]];

> you'll notice that it returns false.  Odd, no?  In any case, you can get
> around this by allowing for subclasses, like so:

> [topic title] should be_instance_of([NSString class]).or_any_subclass();

> On Wed, Sep 26, 2012 at 11:59 PM, Mikhail Dikov <mdi...@gmail.com<javascript:>
> > wrote:

>> I have the following expectation:

>> [topic title] should be_instance_of([NSString class]);

>> However the test fails with an error that <value and (__NSCFString)> is
>> expected to be an instance of <NSString>

>> What am I doing wrong?