public void CanLiftUserDefinedConversionOperator()
{
S7?a = new S7(42), b = null;
Assert.AreEqual((double?)a, 42, "#1");
Assert.IsNull((double?)b, "#2");
}
public void CanLiftUserDefinedBinaryOperator()
{
S7?a = new S7(42), b = new S7(32), c = null;
Assert.AreEqual((a + b).Value.I, 74, "#1");
Assert.IsNull((a + c), "#2");
}
public void CanLiftUserDefinedUnaryOperator()
{
S7?a = new S7(42), b = null;
Assert.AreEqual(-a.Value.I, -42, "#1");
Assert.IsNull(-b, "#2");
}
public void CanLiftUserDefinedUnaryOperator_SPI_1634()
{
S7?a = new S7(42), b = null;
Assert.AreEqual(-42, -a.Value.I, "#1");
// #1634 #SPI
Assert.Null(-b, "#2");
}
public void CanLiftUserDefinedConversionOperator_SPI_1611()
{
S7? a = new S7(42), b = null;
double?d1 = null;
TestHelper.Safe(() => d1 = (double?)a);
Assert.AreEqual(42, d1, "#1");
// #1611
double?d2 = 1;
TestHelper.Safe(() => d2 = (double?)b);
Assert.Null(d2, "#2");
}