CODEWITHSUNDEEP
objective-cioscocoa-touchunit-testingocmock
Shiun
Shiun

Reputation: 2677

How do you mock out private properties with OCMock for iOS?

I have a private property that is declared in the .m file of my class to be tested, let's call it ClassUnderTest. ClassUnderTest instantiates an instance of ClassToBeMocked. How do I use OCMock to mock out an instance of the ClassToBeMocked and assign it to the ClassUnderTest?

Upvotes: 18

Views: 7831

Answers (2)

Christopher Pickslay
Christopher Pickslay

Reputation: 17782

Re-declare the property in your test class. You can do the same for private methods. In ClassUnderTestTest.m:

@interface ClassUnderTest ()

@property(retain)ClassToBeMocked *instanceToBeMocked;

-(void)somePrivateMethod;

@end

Upvotes: 51

Erik Doernenburg
Erik Doernenburg

Reputation: 3016

Does the following work?

id classUnderTest = ... // get from somewhere
id mock = [OCMockObject mockForClass:[ClassToBeMocked class]];
[classUnderTest setValue:mock forKey:@"nameOfThatPrivateProperty"];

Not totally sure whether you can set private properties like this. I think it depends on what kind of property it is.

Upvotes: 1

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