public void UnknownConstraintEventArgs_ctor_Success()
{
UnknownConstraintEventArgs args = new UnknownConstraintEventArgs(Constants.MemberName, ParameterDataType.Guid);
Assert.AreEqual(Constants.MemberName, args.ConstraintName);
Assert.AreEqual(ParameterDataType.Guid, args.DataType);
Assert.IsNull(args.Constraint);
args.Constraint = new DummyConstraint();
Assert.IsNotNull(args.Constraint);
}
/// <summary>
/// Raises the <see cref="UnknownConstraint"/> event, and returns the first constraint resolved by an event handler.
/// </summary>
/// <param name="constraintName">The name of the constraint.</param>
/// <param name="dataType">The data type that the constraint is used for.</param>
/// <returns>The <see cref="Constraint"/> created by an event handler, based on the <paramref name="constraintName"/>, or <see langword="null"/>, if no event handler was present, or the <paramref name="constraintName"/> is unknown.</returns>
protected virtual Constraint OnUnknownConstraint(string constraintName, ParameterDataType dataType)
{
EventHandler<UnknownConstraintEventArgs> ucHandler = UnknownConstraint;
if (ucHandler != null)
{
UnknownConstraintEventArgs e = new UnknownConstraintEventArgs(constraintName, dataType);
foreach (EventHandler<UnknownConstraintEventArgs> handler in ucHandler.GetInvocationList())
{
handler.Invoke(this, e);
if (e.Constraint != null)
{
return e.Constraint;
}
}
}
return null;
}
