ObservableObject Inspection Abnormalities?

[perlguy99]

I created a simple Tic-Tac-Toe game to help learn ViewInspector better...

Repo: Public Repo

I've got a GameController that is an ObservableObject has 2 @Published properties, gameResult and currentTurn, the GameController is also responsible for the gameHeaderTitle String...

class GameController: ObservableObject {
    @Published var gameResult: GameResult = .inProgress
    @Published var currentTurn: Turn = .x
    
    var gameBoard: [Square] = []
    
    var gameHeaderTitle: String {
        switch gameResult {
        case .inProgress:
            return currentTurn.turnString
        case .winner(let winner):
            return "Winner: \(winner == .x ? "X" : "O")"
        case .draw:
            return "DRAW"
        }
    }

... rest of code

In my GameBoardView I have

@ObservedObject var controller = GameController()

On to the ViewInspector Question

I have the following 2 tests in my code, I stripped them down to just what is needed for this issue...

1 test uses the way described for @ObservedObjects and the other uses the way to tests things like @State values...

    func testGameBoardTitleIsCorrect_Q1a() throws {
        // Given that I have a Game Board
        let sut = GameBoardView()
        
        let displayedText = { try sut.inspect().find(viewWithTag: "GameBoardViewTitle").text().string() }
        
        XCTAssertEqual(try displayedText(), "It's X's turn")
        sut.controller.takeTurnAt(0) // X
        XCTAssertEqual(try displayedText(), "It's O's turn")
    }

    func testGameBoardTitleIsCorrect_MoreViewInspector_Q1b() throws {
        // Given that I have a Game Board
        var sut = GameBoardView()
        
        let exp = sut.on(\.didAppear) { view in
            XCTAssert(try view.actualView().inspect().find(viewWithTag: "GameBoardViewTitle").text().string() == "It's X's turn")
            try view.actualView().controller.takeTurnAt(0)
            XCTAssert(try view.actualView().inspect().find(viewWithTag: "GameBoardViewTitle").text().string() == "It's O's turn")
        }
        
        ViewHosting.host(view: sut)
        wait(for: [exp], timeout: 0.1)
    }

Those tests pass just fine and the app works, however...

If I remove the @Published from the currentTurn variable, ALL of the test still pass, but the gameHeaderTitle doesn't update the turns when playing the game!

gameHeaderTitle is not @Published, yet when there is a "winner", then it updates properly?!

Did I setup the tests wrong, or is there something wrong when inspecting the View?

I'm a bit confused at the moment, anyone have any ideas?