rdar://38906161

import Foundation
import XCTest

class DemoTests: XCTestCase {
    func test() {
        self.continueAfterFailure = false
        DispatchQueue.main.async() {
            XCTFail("Boom!")
        }
        let ex = self.expectation(description: "Dummy")
        let r = XCTWaiter.wait(for: [ex], timeout: 2)
        if r != .completed {
            XCTFail("Should not get even here")
        }

        XCTFail("And here for sure!")
        XCTFail("And definitely should not get here!")
    }
}