     }
     
     func testFlippedFlatMapOperator() {
-        if true {
+        do {
             let expectation = expectationWithDescription(""); // this ; is necessary
             
             { (value: Int) -> Promise<()> in

            waitForExpectationsWithTimeout(3.0, handler: nil)
        }
        
        if true {
            let expectation = expectationWithDescription("")
            
            asyncGetOrFail(3, true) >>- { (valueOrNil: Int?) -> Promise<Int?>? in

            waitForExpectationsWithTimeout(3.0, handler: nil)
        }
        
        do {
            let expectation = expectationWithDescription("")
            
            asyncGetOrFail(3, false) >>-? { value in
