public void TestCompareReferenceType()
{
Assert.Throws <ArgumentNullException>(() => Maybe.Compare(Maybe <int> .Nothing, Maybe <int> .Nothing, null));
Assert.Throws <ArgumentNullException>(() => Maybe.Compare(Maybe.Just(1), Maybe <int> .Nothing, null));
Assert.Throws <ArgumentNullException>(() => Maybe.Compare(Maybe.Just(1), Maybe <int> .Just(1), null));
Assert.Throws <ArgumentNullException>(() => Maybe.Compare(Maybe <int> .Nothing, Maybe <int> .Just(1), null));
var valueComparer = Comparer <TestRef> .Create((x, y) => x.Value.CompareTo(y.Value));
{
var x = Maybe <TestRef> .Nothing;
var y = Maybe <TestRef> .Nothing;
var result = Maybe.Compare(x, y, valueComparer);
Assert.AreEqual(0, result);
}
{
var x = Maybe <TestRef> .Nothing;
var y = Maybe.Just(new TestRef(1));
var result = Maybe.Compare(x, y, valueComparer);
Assert.AreEqual(-1, result);
}
{
var x = Maybe <TestRef> .Just(new TestRef(1));
var y = Maybe <TestRef> .Nothing;
var result = Maybe.Compare(x, y, valueComparer);
Assert.AreEqual(1, result);
}
{
var x = Maybe <TestRef> .Just(new TestRef(1));
var y = Maybe <TestRef> .Just(new TestRef(1));
var result = Maybe.Compare(x, y, valueComparer);
Assert.AreEqual(0, result);
}
{
var x = Maybe <TestRef> .Just(new TestRef(2));
var y = Maybe <TestRef> .Just(new TestRef(1));
var result = Maybe.Compare(x, y, valueComparer);
Assert.AreEqual(1, result);
}
{
var x = Maybe <TestRef> .Just(new TestRef(1));
var y = Maybe <TestRef> .Just(new TestRef(2));
var result = Maybe.Compare(x, y, valueComparer);
Assert.AreEqual(-1, result);
}
}
public void TestCompareValueType()
{
{
var x = Maybe <int> .Nothing;
var y = Maybe <int> .Nothing;
var result = Maybe.Compare(x, y);
Assert.AreEqual(0, result);
}
{
var x = Maybe <int> .Nothing;
var y = Maybe.Just(1);
var result = Maybe.Compare(x, y);
Assert.AreEqual(-1, result);
}
{
var x = Maybe <int> .Just(1);
var y = Maybe <int> .Nothing;
var result = Maybe.Compare(x, y);
Assert.AreEqual(1, result);
}
{
var x = Maybe <int> .Just(1);
var y = Maybe <int> .Just(1);
var result = Maybe.Compare(x, y);
Assert.AreEqual(0, result);
}
{
var x = Maybe <int> .Just(2);
var y = Maybe <int> .Just(1);
var result = Maybe.Compare(x, y);
Assert.AreEqual(1, result);
}
{
var x = Maybe <int> .Just(1);
var y = Maybe <int> .Just(2);
var result = Maybe.Compare(x, y);
Assert.AreEqual(-1, result);
}
}
