best way to reuse a set of tests

I want to reuse a test that verifies a windows form closes properly, and the
only thing that varies would be a given form, which also must be an
IClosingWindowView, highlighted below. Sorry to ask what sounds like a basic
question, but I'm basically stumped on this right now. Code is below.

 

TIA,

Eric

 

using NUnit.Framework;

using NUnit.Framework.SyntaxHelpers;

using System.Windows.Forms;

 

namespace ef.GUI

{

    [TestFixture]

    public 

    class ClosingWindowTest

    {

        private IClosingWindowView _view;

        private Form _form;

 

        private ClosingWindowPresenter _presenter;

        private MockYesNoMessageAsker _mockYesNoAsker;

 

        [SetUp]

        public void SetUp() {

            _setupYesNoMessageAsker();

            _setUpIClosingWindowView();

            _setupPresenter();

        }

 

        private void _setupPresenter() {

            _presenter = new ClosingWindowPresenter(_view, _mockYesNoAsker);

            Assert.That(_form.IsDisposed, Is.False);

            Assert.That(_mockYesNoAsker.WasInvoked, Is.False);

        }

 

        private void _setupYesNoMessageAsker() {

            _mockYesNoAsker = new MockYesNoMessageAsker();

        }

 

        /// <summary>

        /// Set up view; we want the Form just to check it has been closed
(IsDisposed), 

        /// but the Presenter never has any knowledge of anything to do with
forms, just the IView.

        /// </summary>

        private void _setUpIClosingWindowView() {

            _form = new frmClosingWindow(); <------- the thing that would
vary across tests

            _view = _form as IClosingWindowView;

        }

  

        [Test]

        public void CloseTheScreen_WhenTheScreenIsNotDirty() {

            // setup unique to this test

            _view.IsDirty = false;

 

            // trigger state changing behavior

            _presenter.Close();

 

            // validate expectation(s)

            // - the msg box is not invoked

            Assert.That(_mockYesNoAsker.WasInvoked, Is.False);

            // - the window closes

            Assert.That(_form.IsDisposed, Is.True);

        }

 

        [Test]

        public void
CloseTheScreen_WhenTheScreenIsDirty_UserContinuesCancelAndDiscardsChanges()
{

            // setup unique to this test

            _view.IsDirty = true;

            _mockYesNoAsker.DidTheMockUserClickOk = true;

            

            // trigger state changing behavior

            _presenter.Close();

 

            // validate expectation(s)

            // - the msg box IS invoked

            Assert.That(_mockYesNoAsker.WasInvoked, Is.True);

            // - the window closes

            Assert.That(_form.IsDisposed, Is.True);

        }

 

        [Test]

        public void CloseTheScreen_WhenTheScreenIsDirty_UserCancelsClosing()
{

            // setup unique to this test

            _view.IsDirty = true;

            _mockYesNoAsker.DidTheMockUserClickOk = false;

 

            // trigger state changing behavior

            _presenter.Close();

 

            // validate expectation(s)

            // - the msg box IS invoked

            Assert.That(_mockYesNoAsker.WasInvoked, Is.True);

            // - the window stays open

            Assert.That(_form.IsDisposed, Is.False);

        }

    }

}

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