Custom Comparers

To add a custom comparer, implement BaseTypeComparer and add to the Config.CustomComparers collection. Custom comparers are run before the built in comparers.

Example

public class MyCustomComparer : BaseTypeComparer
{
 public MyCustomComparer(RootComparer rootComparer) : base(rootComparer)
 {
 }

 public override bool IsTypeMatch(Type type1, Type type2)
 {
  return type1 == typeof (SpecificTenant);
 }

 public override void CompareType(ComparisonResult result, object object1, object object2, string breadCrumb)
 {
  var st1 = (SpecificTenant)object1;
  var st2 = (SpecificTenant)object2;

  if (st1.Name != st2.Name || st1.Amount > 100 || st2.Amount < 100)
  {
   Difference difference = new Difference
    {
     PropertyName = breadCrumb,
     Object1Value = object1.ToString(),
     Object2Value = object2.ToString()
    };

   result.Differences.Add(difference);
  }
 }
}

Usage

SpecificTenant tenant1 = new SpecificTenant();
tenant1.Name = "wire";
tenant1.Amount = 37;

SpecificTenant tenant2 = new SpecificTenant();
tenant2.Name = "wire";
tenant2.Amount = 155;

//No Custom Comparer
CompareLogic compareLogic = new CompareLogic();
Assert.IsFalse(compareLogic.Compare(tenant1, tenant2).AreEqual);

//specify custom selector
compareLogic.Config.CustomComparers.Add(new MyCustomComparer(RootComparerFactory.GetRootComparer()));

Assert.IsTrue(compareLogic.Compare(tenant1, tenant2).AreEqual);

tenant2.Amount = 42;
Assert.IsFalse(compareLogic.Compare(tenant1, tenant2).AreEqual);