XCTAssertThrows: Raising an exception in a dispatch_once() block makes the test to never execute assertion

Originator:g.tranchedone
Number:rdar://14493555 Date Originated:19-Jul-2013 04:53 PM
Status:Open Resolved:
Product:Developer Tools Product Version:Xcode Version 5.0 (5A11344j)
Classification:UI/Usability Reproducible:Always
 
Summary:

If you have a method like this:

+ (void)foo
{
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
            [NSException raise:@"MyException" format:@"Something went wrong"];
    });
}

and a unit test like this:

- (void)testRaiseException
{
    XCTAssertThrows([MyClass foo], @"Test Failed");
}

the test will never pass because the execution is interrupted before the assertion is evaluated.

Steps to Reproduce:
Create a project with the sample code above and run the Test configuration.

Expected Results:
The test should succeed and the 'unit test status mark' should show the green checkmark.

Actual Results:
The execution of the test is interrupted when the exception is encountered. Tests are said to be succeeded but that's simply because the assertion was never executed.

Comments


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