The best example is testing API callbacks for types:
it(@"does something from an API", ^AsyncBlock {
ARImageDownloader *downloader = [[ARImageDownloader alloc] init];
[downloader downloadImages:^(NSArray *objects) {
...
expect(objects).to.containInstancesOfClass(ARImageFormat.class);
...
done();
}];
});
if you prefer you can also use onlyContainInstancesOfClass. Also gives back a useful fail message telling you what other classes have sneaked into your set or an array.
Expecta+ContainerClasses is available through CocoaPods, to install it simply add the following line to your Podfile:
pod "Expecta+ContainerClasses"
It's likely that you'll want this in a testing subset, this usually looks like:
target 'MyApp Tests', :exclusive => true do
pod 'Specta', '~> 0.3'
pod 'Expecta', '~> 0.3'
pod 'Expecta+ContainerClasses', '~> 1.0'
end
Expecta+ContainerClasses is available under the MIT license. See the LICENSE file for more info.