public void GetHashCode()
{
OverrideGHC a = new OverrideGHC(33, true);
OverrideGHC b = new OverrideGHC(178, false);
Console.WriteLine(a.GetHashCode());
Console.WriteLine(b.GetHashCode());
}
public override bool Equals(object obj)
{
OverrideGHC o = (OverrideGHC)obj;
if (a == o.a && b == o.b)
{
return(true);
}
return(false);
}
public void EqualsAndHashCode()
{
OverrideGHC a1 = new OverrideGHC(1, true);
OverrideGHC a2 = new OverrideGHC(1, true);
NotOverrideGHC b1 = new NotOverrideGHC(1, true);
NotOverrideGHC b2 = new NotOverrideGHC(1, true);
//if objects == than their hash codes match
A.IsTrue(a1.Equals(a2));
A.AreEqual(a1.GetHashCode(), a2.GetHashCode());
//default implementation do not satisfies rule above
A.IsTrue(b1.Equals(b2));
A.AreNotEqual(b1.GetHashCode(), b2.GetHashCode());
}
public void OverrideGHCInCollection()
{
String va, vb;
var a = new OverrideGHC(1, true);
var b = new OverrideGHC(1, true);
var d = new Dictionary <OverrideGHC, String>();
d.Add(a, "a1 value");
d.TryGetValue(a, out va);
d.TryGetValue(b, out vb);
//with overrided hash code if objects are equal (even if it is different instances) corretly find them in hash table
A.AreEqual(a, b);
A.AreEqual("a1 value", va);
A.AreEqual("a1 value", vb);
}
