iOS Unit Test Sample: ViewController can respond to an Unwind Segue

iOS Unit Test Sample: ViewController can respond to an Unwind Segue

func testSUT_CanResponseTo_UnwindSegue() {
        
        // create source ViewController for unwind segue (i.e. the PlaceSearchViewController
        let storyboard: UIStoryboard = UIStoryboard(name: "Main_iPhone", bundle: nil)
        let placeSearchVC = storyboard.instantiateViewControllerWithIdentifier("PlaceSearchViewController") as! PlaceSearchViewController
        placeSearchVC.targetSearchText = "Lincoln, NE"
        let _ = placeSearchVC.view
        
        // create unwind segue
        let unwindSegue = UIStoryboardSegue(identifier: "unwindFromPlaceSearchViewController", source: placeSearchVC, destination: systemUnderTest)
        
        // simulate that the PlaceSearchViewController is invoked and notifies the SUT
        systemUnderTest.unwindFromPlaceSearchViewController(unwindSegue)
        
        XCTAssertEqual(systemUnderTest.receivedSearchText, "Lincoln, NE")
    }