Question

So, I was not totally sure this was true:

[TestClass]
public class UnitTest1
{
    private int i = 0;

    [TestMethod]
    public void TestMethod1()
    {
        Thread.Sleep(5000);
        Assert.IsTrue(i == 10);
    }

    [TestMethod]
    public void TestMethod2() {
        i = 10;
    }
}

By the results of the test, it looks like it isn’t, but I’d like to know for sure that if I define a global variable on a Test Method, it can’t be read by other Test Methods.

Also, do I have to define

    [TestCleanup]
    public void Test_Cleanup() {
        engine = null;
    }

becase of this

    [TestInitialize]
    public void Test_Initialize()
    {
        var pieceGeneratorMock = new Mock<IPieceGenerator>();
        pieceGeneratorMock.Setup(pg => pg.Generate())
            .Returns(new Piece(Color.Red));
        IPieceGenerator pieceGenerator = pieceGeneratorMock.Object;

        Size size = new Size(4, 4);
        BackgroundBoard backgroundBoard = new BackgroundBoard(size);
        PieceBoard pieceBoard = new PieceBoard(size);
        engine = new Engine(pieceGenerator, backgroundBoard, pieceBoard);
    }

?

Answer 1

In JUnit, at least, each test method is invoked on a separate instance of your TestCase. You could verify this for yourself by outputting/logging the indentity hash of this in each test* method.