Pragmatic Unit Tests using "yield return" for providing test cases

using System;
using System.Collections.Generic;
using Microsoft.VisualStudio.TestTools.UnitTesting;

namespace TestProject1
{
    /// <summary>
    /// Summary description for UnitTest1
    /// </summary>
    [TestClass]
    public class UnitTest1
    {
        [TestMethod]
        public void TestMethod1()
        {
            foreach (TestCase testCase in getTestCases())
            {
                // Create the tested class
                var c = new Calculator();
                try
                {
                    // invoke the tested method
                    int result = c.Divide(testCase.Dividend, testCase.Divisor);

                    // check the result
                    Assert.AreEqual(testCase.ExpectedResult, result);
                    Assert.IsNull(testCase.ExpectedExceptionType);
                }
                catch (Exception ex)
                {
                    // an error has occured
                    Assert.IsNotNull(testCase.ExpectedExceptionType);
                    Assert.AreEqual(testCase.ExpectedExceptionType, ex.GetType());
                }
            }
        }

        private IEnumerable<TestCase> getTestCases()
        {
            // both Dividend and diviser are 0
            var tc = new TestCase(0, 0, 0, typeof (DivideByZeroException));
            tc.Description = "both Dividend and diviser are 0";
            yield return tc;

            // Dividend is 0, Diviser is > 0
            tc = new TestCase(0, 1, 0, null);
            tc.Description = "Dividend is 0, Diviser is > 0";
            yield return tc;

            // Dividend is > 0, Diviser is 0
            tc = new TestCase(1, 0, 0, typeof (DivideByZeroException));
            tc.Description = "Dividend is > 0, Diviser is 0";
            yield return tc;
        }

        #region Nested type: TestCase

        private class TestCase
        {
            public TestCase(int dividend, int divisor,
                            int expectedResult, Type expectedExceptionType)
            {
                Dividend = dividend;
                Divisor = divisor;
                ExpectedResult = expectedResult;
                ExpectedExceptionType = expectedExceptionType;
            }

            public int Dividend { get; set; }
            public int Divisor { get; set; }
            public int ExpectedResult { get; set; }
            public Type ExpectedExceptionType { get; set; }
            public string Description { get; set; }
        }

        #endregion
    }
}