/// <summary>Verifies an argument is <see langword="null"/>.</summary>
/// <typeparam name="T">The argument type.</typeparam>
/// <param name="source">The source.</param>
/// <param name="message">The message.</param>
/// <param name="messageArgs">The message arguments.</param>
/// <returns>The constraint.</returns>
/// <exception cref="ArgumentException">The argument is not <see langword="null"/>.</exception>
public static AndArgumentConstraint <T> IsNull <T>(this ArgumentConstraint <T> source, string message, params object[] messageArgs) where T : class
{
if (source.Argument.Value != null)
{
throw new ArgumentException(String.Format(message, messageArgs), source.Argument.Name);
}
return(new AndArgumentConstraint <T>(source));
}
/// <summary>Verifies an argument is not <see langword="null"/>.</summary>
/// <typeparam name="T">The argument type.</typeparam>
/// <param name="source">The source.</param>
/// <returns>The constraint.</returns>
/// <exception cref="ArgumentNullException">The argument is <see langword="null"/>.</exception>
public static AndArgumentConstraint <T> IsNotNull <T>(this ArgumentConstraint <T> source) where T : class
{
if (source.Argument.Value == null)
{
throw new ArgumentNullException(source.Argument.Name);
}
return(new AndArgumentConstraint <T>(source));
}
/// <summary>Initializes an instance of the <see cref="AndArgumentConstraint{T}"/> class.</summary>
/// <exception cref="ArgumentNullException"><paramref name="parent"/> is <see langword="null"/>.</exception>
public AndArgumentConstraint(ArgumentConstraint <T> parent)
{
if (parent == null)
{
throw new ArgumentNullException("parent");
}
m_parent = parent;
}
/// <summary>Verifies an argument is <see langword="null"/>.</summary>
/// <typeparam name="T">The argument type.</typeparam>
/// <param name="source">The source.</param>
/// <returns>The constraint.</returns>
/// <exception cref="ArgumentException">The argument is not <see langword="null"/>.</exception>
public static AndArgumentConstraint <T> IsNull <T>(this ArgumentConstraint <T> source) where T : class
{
return(IsNull(source, "Must be null."));
}