/// <summary>
/// Test whether the constraint is satisfied by a given value
/// </summary>
/// <param name="actual">The value to be tested</param>
/// <returns>True for success, false for failure</returns>
protected override ConstraintResult ApplyConstraint <TActual>(TActual actual)
{
if (_from == null || _to == null || actual == null)
{
throw new ArgumentException("Cannot compare using a null reference", nameof(actual));
}
CompareFromAndTo();
bool isInsideRange = _comparer.Compare(_from, actual) <= 0 && _comparer.Compare(_to, actual) >= 0;
return(new ConstraintResult(this, actual, isInsideRange));
}
public static void CanCompareWithNull(ComparisonAdapter adapter)
{
Assert.That(adapter.Compare(null, "a"), Is.LessThan(0));
Assert.That(adapter.Compare("a", null), Is.GreaterThan(0));
Assert.That(adapter.Compare(null, null), Is.Zero);
}