public void OneTimeSetUp() { _manager.Launch(_sourceFile); var tabView = _manager.Window?.FindTabView(); Assume.That(tabView, Is.Not.Null); _tab = tabView !.FindFirstDescendant(x => x.ByClassName(nameof(EditorTab))).AsTabItem(); Assume.That(_tab, Is.Not.Null, "Editor tab not automatically shown"); var scintilla = _tab.FindFirstDescendant("Editor").AsScintilla(); Assume.That(scintilla, Is.Not.Null); _editor = scintilla !; _originalCode = _editor.Text; Assume.That(_originalCode, Is.Not.Empty); }