Objective C test class using Swift code

Question

I have a swift protocol IModelIdProvider in the MyProjectName folder. I have created an objective-c unit test class named RemoteModelFactoryTest in the MyProjectNameTests folder. To do some tests, RemoteModelFactoryTest must implement the IModelIdProvider protocol.

When I #import "MyProjectName-Swift.h" to use my swift protocol in my objective-c class, I get a file not found.

If I change the #import instruction to #import "MyProjectNameTests-Swift.h", the header is found but not my protocol (it's defined in the MyProjectName project, not in the MyProjectNameTests project).

Is there something special to do in the *Tests projects to use Swift code ?

Answer 1

I know its extra hacky and everything, but what I did and it worked was to copy public headers from generated "Project-Swift.h" and paste whats needed to .m file of test.

So I copied something like this:

SWIFT_CLASS("_TtC10Inventorum11ImageEntity")
@interface ImageEntity : NSObject <FICEntity>
@property (nonatomic, copy) NSString * imageID;
@property (nonatomic) NSURL * retinaImageURL;
@property (nonatomic) NSURL * nonRetinaimageURL;
@property (nonatomic, readonly) NSURL * imageURL;
@property (nonatomic, readonly, copy) NSString * UUID;
@property (nonatomic, readonly, copy) NSString * sourceImageUUID;
@property (nonatomic) RACSignal * rac_signalForImage;
- (instancetype)init OBJC_DESIGNATED_INITIALIZER;
- (NSURL *)sourceImageURLWithFormatName:(NSString *)formatName;
- (FICEntityImageDrawingBlock)drawingBlockForImage:(UIImage *)image withFormatName:(NSString *)formatName;
- (void)objc_setType:(NSString *)type;
@end

And on top of this I have also copied all the macros for SWIFT_CLASS etc. My tests are building and passing testing Swift code.

BTW. Dont forget to put public on tested classes and methods in Swift.