Tiny Types part 2–adding IEquatable

This is a series

1. http://msprogrammer.serviciipeweb.ro/2018/03/12/tiny-types-in-cpart-1/
2. http://msprogrammer.serviciipeweb.ro/2018/03/19/tiny-types-part-2adding-iequatable/

3. http://msprogrammer.serviciipeweb.ro/2018/03/26/tinytypesadding-equality-operatorpart-3/

4. http://msprogrammer.serviciipeweb.ro/2018/04/02/tiny-typesdocumentationpart-4/

As always, the bigger problem is adding equality. The Tiny Type should be equal with the inner value – and with the other type with the same value. And, in C#, when you implement equality , there is a whole theory – see https://msdn.microsoft.com/en-us/library/336aedhh(v=vs.100).aspx .

So the code to define equality is 60 lines long just for defining equality for

public class TinyType<T>:IEquatable<T>, IEquatable<TinyType<T>>

   

But this is not all. This is the code for testing equality

using Microsoft.VisualStudio.TestTools.UnitTesting;
using TinyTypesObjects;

namespace TinyTypesTest
{
    [TestClass]
    public class TestTinyTypeEquals
    {
        [TestMethod]
        public void TestSimpleStringEquals()
        {
            #region arrange
            string s = "http://msprogrammer.serviciipeweb.ro";
            #endregion
            #region act
            TinyType<string> tt1 = s;
            TinyType<string> tt2 = s;
            #endregion
            #region assert
            Assert.IsTrue(tt1.Equals(tt2));
            Assert.AreEqual(tt1, tt2);
            Assert.AreEqual<string>(tt1, tt2);
            Assert.AreEqual<TinyType<string>>(tt1, tt2);
            Assert.AreEqual<string>(s, tt2);
            #endregion
        }
        [TestMethod]
        public void TestSimpleStringWithNull()
        {
            #region arrange
            string s = null;
            #endregion
            #region act
            TinyType<string> tt1 = s;
            TinyType<string> tt2 = null;
            #endregion
            #region assert
            Assert.IsFalse(tt1.Equals(tt2));
            Assert.AreNotEqual(tt1, tt2);
            Assert.AreEqual<string>(tt1, tt2);
            Assert.AreNotEqual<TinyType<string>>(tt1, tt2);
            Assert.AreEqual<string>(s, tt2);
            #endregion
        }
        [TestMethod]
        public void TestSimpleStringNull()
        {
            #region arrange
            string s = null;
            #endregion
            #region act
            TinyType<string> tt1 = s;
            TinyType<string> tt2 = s;
            #endregion
            #region assert
            Assert.IsTrue(tt1.Equals(tt2));
            Assert.AreEqual(tt1, tt2);
            Assert.AreEqual<string>(tt1, tt2);
            Assert.AreEqual<TinyType<string>>(tt1, tt2);
            Assert.AreEqual<string>(s, tt2);
            #endregion
        }
        [TestMethod]
        public void TestSimpleIntEquals()
        {
            #region arrange
            int s = 1;
            #endregion
            #region act
            TinyType<int> tt1 = s;
            TinyType<int> tt2 = s;
            #endregion
            #region assert
            Assert.IsTrue(tt1.Equals(tt2));
            Assert.AreEqual(tt1, tt2);
            Assert.AreEqual<int>(tt1, tt2);
            Assert.AreEqual<TinyType<int>>(tt1, tt2);
            Assert.AreEqual<int>(s, tt2);
            
            #endregion
        }

    }
}