Open Radar

 
Summary:
XCTestAssertNil cannot be used to check Swift structs to not be nil because Swift structs do not conform to AnyObject

Steps to Reproduce:
1. Create a new Xcode Swift project that uses unit tests
2. Create a new test case
3. In the test case declare a new struct like the following: struct StructA {}
4. In a test method create a new instance of StructA
5. Try to assert that the instance is not nil using XCTAssertNil

Expected Results:
The test should pass because the instance is not nil

Actual Results:
The compiler fails because XCTAssertNil expects an auto closure returning an instance of AnyObject? but StructA does not conform to AnyObject

Version:
Xcode 6.0 (6A280e)

Notes:
Changing the return type of the auto closure from AnyObject? to Any? should fix the problem
One can also declare a custom version of XCTAssertNil that takes an auto closure returning Any? as the first argument and does exactly the job. A version like this should be included in the XCTest Framework:
func XCTAssertNil(expression: @autoclosure () -> Any?, _ message: String? = nil) {
	if let message = message {
		XCTAssert(expression() == nil, message)
	} else {
		XCTAssert(expression() == nil)
	}
}