Open Radar

 
XCTestAssertionsImpl.h includes a bunch of @catch blocks that look like:

    @catch (id exception) { \
        _XCTRegisterFailure(_XCTFailureDescription(_XCTAssertion_False, 1, @#expression, [exception reason]),format); \
    }\

Because exception is typed as id, #import'ing another header with a method named "reason" can cause this compilation error.  


Steps to reproduce:

// xctest.m
#import <Foundation/Foundation.h>
#import <XCTest/XCTest.h>

@interface MyObject : NSObject
@property(nonatomic, assign) NSInteger reason;
@end
@implementation MyObject
@end

@interface MyTest : XCTestCase
@end

@implementation MyTest

- (void)testFoo {
  id foo = nil;
  XCTAssertNil(foo, @"foo should be nil");
}
@end

int main() {
}



xctest.m:18:3: warning: multiple methods named 'reason' found
  XCTAssertNil(foo, @"foo should be nil");
  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/Applications/Xcode.app/Contents/Developer/Library/Frameworks/XCTest.framework/Headers/XCTestAssertions.h:47:5: note: expanded from macro 'XCTAssertNil'
    _XCTPrimitiveAssertNil(a1, ## format)
    ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/Applications/Xcode.app/Contents/Developer/Library/Frameworks/XCTest.framework/Headers/XCTestAssertionsImpl.h:94:80: note: expanded from macro '_XCTPrimitiveAssertNil'
        _XCTRegisterFailure(_XCTFailureDescription(_XCTAssertion_Nil, 1, @#a1, [exception reason]),format); \
                                                                               ^~~~~~~~~~~~~~~~~~
/Applications/Xcode.app/Contents/Developer/Library/Frameworks/XCTest.framework/Headers/XCTestAssertionsImpl.h:70:91: note: expanded from macro '_XCTFailureDescription'
    [NSString stringWithFormat:_XCTFailureFormat(assertion_type, uncaught_exception), @"" format]; \
                                                                                          ^
/Applications/Xcode.app/Contents/Developer/Library/Frameworks/XCTest.framework/Headers/XCTestAssertionsImpl.h:39:55: note: expanded from macro '_XCTRegisterFailure'
    _XCTFailureHandler(self, YES, __FILE__, __LINE__, condition, @"" format); \
                                                      ^
/System/Library/Frameworks/Foundation.framework/Headers/NSException.h:50:1: note: using
- (NSString *)reason;
^~~~~~~~~~~~~~~~~~~~~
xctest.m:6:40: note: also found
@property(nonatomic, assign) NSInteger reason;
                                       ^~~~~~
1 warning generated.