Issue stubbing a method - ios

Question

I'm working with CoreBluetooth, so in my unit tests I'm mocking all the CB objects so they return what I want. In one of my tests, I mock a CBPeripheral, and stub the delegate method like so:
[[[mockPeripheral stub] andReturn:device] delegate];
The device passed in is my wrapper object which holds on to the peripheral. Later in the test, I call a method on device which then checks:
NSAssert(_peripheral.delegate == self, #"Empty device");
This line is being asserted during the test because _peripheral.delegate != self.
I've debugged through, and made sure that _peripheral is an OCMockObject. Why isn't the stubbed method returning device when the assert checks the _peripheral's delegate?
Here's the detailed code:
#interface Manager : NSObject
- (void)connectToDevice:(Device*)device;
#end
#implementation Foo
- (void)connectToDevice:(Device*)device {
if([device checkDevice]) {
/** Do Stuff */
}
}
#end
#interface Device : NSObject {
CBPeripheral _peripheral;
}
- (id)initWithPeripheral:(CBPeripheral*)peripheral;
#end
#implementation Device
- (id)initWithPeripheral:(CBPeripheral*)peripheral {
self = [super init];
if(self) {
_peripheral = peripheral;
_peripheral.delegate = self;
}
return self;
}
- (BOOL)checkDevice {
NSAssert(_peripheral.delegate == self, #"Empty device");
return YES;
}
#end
#implementation Test
__block id peripheralMock;
beforeAll(^{
peripheralMock = [OCMockObject mockForClass:[CBPeripheral class]];
});
//TEST METHOD
it(#"should connect", ^{
Device *device = [[Device alloc] initWithPeripheral:peripheralMock];
[[[peripheralMock stub] andReturn:device] delegate];
[manager connectToDevice:device];
}
#end

Answer 1

I am not able to reproduce this -- is this what you're doing?
#interface Bar : NSObject <CBPeripheralDelegate>
#property (nonatomic, strong) CBPeripheral *peripheral;
- (void)peripheralTest;
#end
- (void)peripheralTest
{
NSAssert(_peripheral.delegate == self, #"Empty device");
}
// In test class:
- (void)testPeripheral
{
Bar *bar = [Bar new];
id peripheralMock = [OCMockObject mockForClass:CBPeripheral.class];
[[[peripheralMock stub] andReturn:bar] delegate];
bar.peripheral = peripheralMock;
[bar peripheralTest];
}
This test passes for me.