/// <summary>
/// Write the constraint description to a MessageWriter
/// </summary>
/// <param name="writer">The writer on which the description is displayed</param>
/// <exception cref="ArgumentNullException">if the message writer is null.</exception>
public override void WriteDescriptionTo( MessageWriter writer )
{
if ( writer == null )
{
throw new ArgumentNullException( "writer" );
}
writer.Write( Resources.Empty );
}
/// <summary>
/// Display the failure information for two collections that did not
/// match.
/// </summary>
/// <param name="writer">The MessageWriter on which to display</param>
/// <param name="expected">The expected collection.</param>
/// <param name="actual">The actual collection</param>
/// <param name="depth">The depth of this failure in a set of nested collections</param>
private void DisplayCollectionDifferences( MessageWriter writer, ICollection expected, ICollection actual, int depth )
{
int failurePoint = _failurePoints.Count > depth ? (int) _failurePoints[depth] : -1;
DisplayCollectionTypesAndSizes( writer, expected, actual, depth );
if ( failurePoint >= 0 )
{
DisplayFailurePoint( writer, expected, actual, failurePoint, depth );
if ( failurePoint < expected.Count && failurePoint < actual.Count )
{
DisplayDifferences(
writer,
GetValueFromCollection( expected, failurePoint ),
GetValueFromCollection( actual, failurePoint ),
++depth );
}
else if ( expected.Count < actual.Count )
{
writer.Write( string.Format( " {0}: ", Resources.Extra ) );
writer.WriteCollectionElements( actual, failurePoint, 3 );
}
else
{
writer.Write(string.Format( " {0}: ", Resources.Missing ));
writer.WriteCollectionElements( expected, failurePoint, 3 );
}
}
}
