     */
     func test_cancel_chain() {
         let expt = expectationWithDescription(__FUNCTION__)
-
+        
         let (headDeferred, headPromise) = Promise<Void>.defer()
         
         headDeferred.onCanceled { () -> Void in

    // MARK: - resolve(_)
    
    func test_resolve() {

        let expt0 = expectationWithDescription("\(__FUNCTION__)_0")
        let a0: Promise<String> = Promise<String>.resolve(STRING_VALUE_0)
        a0.then { (value) -> Void in

        for index in 0..<3 {
            expts.append(expectationWithDescription("\(__FUNCTION__)_\(index)"))
        }
        
        let fulfilledPromise = Promise<String>(value: STRING_VALUE_0)
        fulfilledPromise.cancel().then(
            onFulfilled: { (value) -> Void in
