static void Main(string[] args)
{
#region Level 0
string name = " 123456 ";
name.Trim();
Console.WriteLine(name.Length);
name = name.Trim(); // immutable always returns a new string
Console.WriteLine(name.Length);
#endregion
#region Basic
var r1 = new MutableRectangle();
r1.Height = 10;
r1.Length = 5;
r1.Grow(10, 5);
Console.WriteLine(r1.ToString());
#endregion
#region Patterns
#region 1. Mutable
var m = new Mutable();
m.Value = 10;
m.Value = 20;
#endregion
#region 2. ShallowMutable
StringBuilder builder = new StringBuilder();
builder.Append("foo");
var sm = new ShallowMutable(10, builder);
sm.Builder.Append("bar");
Console.WriteLine(sm.Builder);
#endregion
#region 3. Popsicle
var p = new Popsicle();
p.Value = 10;
p.Freeze();
//p.Value = 20; //Bang!
#endregion
#region 4. ObservableImmutable
#endregion
#endregion
Console.ReadLine();
}
public void Prove_mutability()
{
var rectangle = new MutableRectangle(1, 2);
var rectangleBackup = rectangle;
rectangle.Grow(10);
Assert.Equal(11, rectangle.Width);
Assert.NotEqual(1, rectangleBackup.Width);
Assert.Same(rectangle, rectangleBackup);
}