A Programmer with Microsoft tools

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/

tiny types in C#

Tiny types is a NuGET dll , https://www.nuget.org/packages/TinyTypesObjects/

Also , you can find the construction here: http://msprogrammer.serviciipeweb.ro/category/tinytypes/

The documentation is copied shameless from https://github.com/jan-molak/tiny-types

Installation

To install the module from nuget : … Install-Package TinyTypesObjects …

Defining Tiny Types

An int on its own is just a scalar with no meaning. With an object, even a small one, you are giving both the compiler and the programmer additional information about what the value is and why it is being used.

‐ Jeff Bay, Object Calisthenics

Single-value types

To define a single-value TinyType – extend from TinyType<T>() :

If you want operator ==, please use TinyTypeOf or TinyTypeOfString

using TinyTypesObjects;

public class Age : TinyTypeOf<int>
    {
        public Age(int nr) : base(nr)
        {

        }
    }
public class FirstName : TinyTypeOfString
    {
        public FirstName(string str) : base(str)
        {

        }
    }

Every tiny type defined this way has a get property value of type T, which you can use to access the wrapped primitive value. For example:

var firstName = new FirstName("Jan");

Assert.AreEqual(firstName.value , "Jan");
        

Converting from / to original values

There are defined conversions between type T and the class

public void TestConvert()
        {
            string s = "http://msprogrammer.serviciipeweb.ro";
            TinyTypeOfString tt = s;
            Assert.AreEqual(s, (string)tt);

            int nr = 7;
            TinyTypeOf<int> tt1 = nr;

            Assert.AreEqual(nr, (int)tt1);
        }
        

so the following code should work for the class with constructor string

class TestConstructor
    {
        public TestConstructor(string firstName)
        {
            FirstName = firstName;
        }

        public string FirstName { get; }
    }
[TestMethod]
        public void TestConstructor()
        {
            var firstName = new FirstName("Jan");
            TestConstructor tc = new TestConstructor(firstName);
            Assert.AreEqual(tc.FirstName, "Jan");
        }

Equals or ==

Each tiny type object has an equals method, which you can use to compare it by value:

int nr = 7;
            TinyTypeOf<int> tt1 = nr;
            TinyTypeOf<int> tt2 = nr;

            Assert.AreEqual(tt1, tt2);
            Assert.IsTrue(tt1 == tt2);

Links:

GitHub: https://github.com/ignatandrei/tinyTypes

Blog About: http://msprogrammer.serviciipeweb.ro/category/tinytypes/

NuGet: https://www.nuget.org/packages/TinyTypesObjects/

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/

Now we have come to the interesting part – the equality operator.

We have already operator equals, but not ==

 [TestMethod]
        public void TestSimpleIntOperatorEqual()
        {
            int nr = 7;
            TinyType<int> tt1 = nr;
            TinyType<int> tt2 = nr;

            Assert.AreEqual(tt1, tt2);
            Assert.IsFalse(tt1 == tt2);
        }
        [TestMethod]
        public void TestSimpleStringOperatorEqual()
        {
            string s = "http://msprogrammer.serviciipeweb.ro";
            TinyType<string> tt1 = s;
            TinyType<string> tt2 = s;

            Assert.AreEqual(tt1, tt2);
            Assert.IsFalse(tt1 == tt2);
        }

Because we primary want this TinyTypes for structs( int, double, bool, and so on) we can define a new class

For this we could implement operator  ==  by using the Equals operator ( because we KNOW that a struct cannot be null)

public class TinyTypeOf<T> : TinyType<T>
        where T:struct
    {
        public TinyTypeOf(T tDef) : base(tDef)
        {
        }

       
        public static bool operator ==(TinyTypeOf<T> lhs, TinyTypeOf<T> rhs)
        {
            if(lhs is null)
            {
                return rhs is null;
            }
            return lhs.t.Equals(rhs.t);
        }

        public static bool operator !=(TinyTypeOf<T> lhs, TinyTypeOf<T> rhs)
        {
            return !(lhs==rhs);
        }

CODE FOR NEW CLASS

Also, because the string is not a struct, but a class, we need for String also:

public class TinyTypeOfString : TinyType<string>

And the tests are

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

namespace TinyTypesTest
{
    [TestClass]
    public class TestTinyTypeOperatorEqual
    {
        [TestMethod]
        public void TestSimpleIntOperatorEqual()
        {
            int nr = 7;
            TinyType<int> tt1 = nr;
            TinyType<int> tt2 = nr;

            Assert.AreEqual(tt1, tt2);
            Assert.IsFalse(tt1 == tt2);
        }
        [TestMethod]
        public void TestSimpleStringOperatorEqual()
        {
            string s = "http://msprogrammer.serviciipeweb.ro";
            TinyType<string> tt1 = s;
            TinyType<string> tt2 = s;

            Assert.AreEqual(tt1, tt2);
            Assert.IsFalse(tt1 == tt2);
        }
        [TestMethod]
        public void TestSimpleStringOperatorEqualWorks()
        {
            string s = "http://msprogrammer.serviciipeweb.ro";

            TinyTypeOfString tt1 = s;
            TinyTypeOfString tt2 = s;

            Assert.AreEqual(tt1, tt2);
            Assert.IsTrue(tt1 == tt2);
        }

        [TestMethod]
        public void TestSimpleIntOperatorEqualWorks()
        {
            int nr = 7;
            TinyTypeOf<int> tt1 = nr;
            TinyTypeOf<int> tt2 = nr;

            Assert.AreEqual(tt1, tt2);
            Assert.IsTrue(tt1 == tt2);
        }
        [TestMethod]
        public void TestSimpleIntNrOperatorEqualWorks()
        {
            int nr = 7;
            TinyType<int> tt1 = nr;
            
            Assert.AreEqual(tt1, nr);
            Assert.IsTrue(tt1 == nr);
        }
    }
}