public new void GetHashCode()
{
var obj1 = new Testing(5, "ABC");
var obj2 = new Testing(3, "NA");
var obj3 = new Testing(2, "ABCDE");
var obj4 = new Testing(5, "NA");
var obj5 = new Testing(7, null);
var comparer = new EqualityComparerStateless <Testing, int>(obj => obj.A);
Assert.Equal(comparer.GetHashCode(obj1), obj1.A.GetHashCode());
Assert.Equal(comparer.GetHashCode(obj2), obj2.A.GetHashCode());
Assert.Equal(comparer.GetHashCode(obj3), obj3.A.GetHashCode());
Assert.Equal(comparer.GetHashCode(obj4), obj4.A.GetHashCode());
Assert.Equal(comparer.GetHashCode(obj5), obj5.A.GetHashCode());
var stringComparer = new EqualityComparerStateless <Testing, string>(obj => obj.B);
Assert.Equal(stringComparer.GetHashCode(obj1), obj1.B.GetHashCode());
Assert.Equal(stringComparer.GetHashCode(obj2), obj2.B.GetHashCode());
Assert.Equal(stringComparer.GetHashCode(obj3), obj3.B.GetHashCode());
Assert.Equal(stringComparer.GetHashCode(obj4), obj4.B.GetHashCode());
Assert.Equal(stringComparer.GetHashCode(obj5), 0);
}
public void Equals()
{
var obj1 = new Testing(5, "ABC");
var obj2 = new Testing(3, "NA");
var obj3 = new Testing(2, "ABCDE");
var obj4 = new Testing(5, "NA");
var obj5 = new Testing(7, null);
var comparer = new EqualityComparerStateless <Testing, int>(obj => obj.A);
Assert.True(comparer.Equals(obj1, obj1));
Assert.False(comparer.Equals(obj1, obj2));
Assert.False(comparer.Equals(obj1, obj3));
Assert.True(comparer.Equals(obj1, obj4));
Assert.False(comparer.Equals(obj1, obj5));
Assert.False(comparer.Equals(obj2, obj1));
Assert.True(comparer.Equals(obj2, obj2));
Assert.False(comparer.Equals(obj2, obj3));
Assert.False(comparer.Equals(obj2, obj4));
Assert.False(comparer.Equals(obj2, obj5));
Assert.False(comparer.Equals(obj3, obj1));
Assert.False(comparer.Equals(obj3, obj2));
Assert.True(comparer.Equals(obj3, obj3));
Assert.False(comparer.Equals(obj3, obj4));
Assert.False(comparer.Equals(obj3, obj5));
Assert.True(comparer.Equals(obj4, obj1));
Assert.False(comparer.Equals(obj4, obj2));
Assert.False(comparer.Equals(obj4, obj3));
Assert.True(comparer.Equals(obj4, obj4));
Assert.False(comparer.Equals(obj4, obj5));
Assert.False(comparer.Equals(obj5, obj1));
Assert.False(comparer.Equals(obj5, obj2));
Assert.False(comparer.Equals(obj5, obj3));
Assert.False(comparer.Equals(obj5, obj4));
Assert.True(comparer.Equals(obj5, obj5));
var stringComparer = new EqualityComparerStateless <Testing, string>(obj => obj.B);
Assert.True(stringComparer.Equals(obj1, obj1));
Assert.False(stringComparer.Equals(obj1, obj2));
Assert.False(stringComparer.Equals(obj1, obj3));
Assert.False(stringComparer.Equals(obj1, obj4));
Assert.False(stringComparer.Equals(obj1, obj5));
Assert.False(stringComparer.Equals(obj2, obj1));
Assert.True(stringComparer.Equals(obj2, obj2));
Assert.False(stringComparer.Equals(obj2, obj3));
Assert.True(stringComparer.Equals(obj2, obj4));
Assert.False(stringComparer.Equals(obj2, obj5));
Assert.False(stringComparer.Equals(obj3, obj1));
Assert.False(stringComparer.Equals(obj3, obj2));
Assert.True(stringComparer.Equals(obj3, obj3));
Assert.False(stringComparer.Equals(obj3, obj4));
Assert.False(stringComparer.Equals(obj3, obj5));
Assert.False(stringComparer.Equals(obj4, obj1));
Assert.True(stringComparer.Equals(obj4, obj2));
Assert.False(stringComparer.Equals(obj4, obj3));
Assert.True(stringComparer.Equals(obj4, obj4));
Assert.False(stringComparer.Equals(obj4, obj5));
Assert.False(stringComparer.Equals(obj5, obj1));
Assert.False(stringComparer.Equals(obj5, obj2));
Assert.False(stringComparer.Equals(obj5, obj3));
Assert.False(stringComparer.Equals(obj5, obj4));
Assert.True(stringComparer.Equals(obj5, obj5));
}
