Question

I am creating a unit test that will test company information into the system but so I can test various assertions in my test.

Here is the code I wrote:

public static Random randnum = new Random();
private string _company = DateTime.Now.ToString("dd/MM/yy ") + ("company") + randnum.Next().ToString();

Basically I am just trying to get a random number to generate with each assertion where the company is listed. So am I writing this wrong or did I forget a piece?

I am using MBUnit.

Please help!

Answer 1

Rewrite your unit test to use the following.

public static IEnumerable<object[]> Numbers
    {
        get
        {
            List<object[]> testCases = new List<object[]>();
            Random random = new Random();
            testCases.AddRange(
                (from x in new[]
                {1, 2, 3, 4, 5, 6, 7, 8}
                select new object[] {x})
                .OrderBy(x=>random.Next()));
            return testCases;
        }
    }

    [TestCaseSource("Numbers")]
    public void CreateApplication(
        int number
        )
    {
         string company = DateTime.Now.ToString("dd/MM/yy ") + ("company") + number.ToString();

    }

I suspect your issue is with Immutability (Immutable object). You are setting a private _company field with an initial value. Calls to this value wont regenerate the random number but instead use the value created when this class was instantiated.

Here is a good link which I found interesting regarding random numbers.

How do I seed a random class to avoid getting duplicate random values