/// <summary>
/// Succeeds if either left or right succeeds.
/// If both fail, merges and flattens messages.
/// </summary>
public static INamedPredicate Or(this INamedPredicate left, INamedPredicate right)
{
return new NamedPredicate(
o =>
{
string dummy;
return left.Matches(o, out dummy) || right.Matches(o, out dummy);
},
o =>
{
string leftMsg, rightMsg;
left.Matches(o, out leftMsg);
right.Matches(o, out rightMsg);
return leftMsg + ", " + rightMsg;
}
);
}
/// <summary>
/// Applies only to enumerable nodes.
/// The source predicate will only be applied to nodes where the filter returns true.
/// </summary>
/// <param name="source">A predicate, like `Should.Have(3)`</param>
/// <param name="filter">A filter, like `thing => thing.Attribute = "target"`</param>
public static INamedPredicate Where(this INamedPredicate source, Func <dynamic, bool> filter)
{
return(new NamedPredicate(
o => {
var filtered = ((IEnumerable <object>)o).Where(filter);
string dummy;
return source.Matches(filtered, out dummy);
},
o =>
{
var filtered = ((IEnumerable <object>)o).Where(filter);
string message;
source.Matches(filtered, out message);
return message;
}
));
}
/// <summary>
/// Succeeds if either left or right succeeds.
/// If both fail, merges and flattens messages.
/// </summary>
public static INamedPredicate Or(this INamedPredicate left, INamedPredicate right)
{
return(new NamedPredicate(
o =>
{
string dummy;
return left.Matches(o, out dummy) || right.Matches(o, out dummy);
},
o =>
{
string leftMsg, rightMsg;
left.Matches(o, out leftMsg);
right.Matches(o, out rightMsg);
return leftMsg + ", " + rightMsg;
}
));
}
/// <summary>
/// Applies only to enumerable nodes.
/// The source predicate will only be applied to nodes where the filter returns true.
/// </summary>
/// <param name="source">A predicate, like `Should.Have(3)`</param>
/// <param name="filter">A named predicate, only the items that are successful in this predicate will
/// be passed to the source. The last item's message will be included in case of source predicate
/// failure</param>
public static INamedPredicate Where(this INamedPredicate source, INamedPredicate filter)
{
return new NamedPredicate(
o => {
string dummy;
var filtered = ((IEnumerable<object>)o).Where(
a => filter.Matches(a, out dummy));
return source.Matches(filtered, out dummy);
},
o =>
{
var lastWhereMessage = "";
var filtered = ((IEnumerable<object>)o).Where(
a => filter.Matches(a, out lastWhereMessage));
string message;
source.Matches(filtered, out message);
return message + " where " + lastWhereMessage;
}
);
}
/// <summary>
/// Applies only to enumerable nodes.
/// The source predicate will only be applied to nodes where the filter returns true.
/// </summary>
/// <param name="source">A predicate, like `Should.Have(3)`</param>
/// <param name="filter">A named predicate, only the items that are successful in this predicate will
/// be passed to the source. The last item's message will be included in case of source predicate
/// failure</param>
public static INamedPredicate Where(this INamedPredicate source, INamedPredicate filter)
{
return(new NamedPredicate(
o => {
string dummy;
var filtered = ((IEnumerable <object>)o).Where(
a => filter.Matches(a, out dummy));
return source.Matches(filtered, out dummy);
},
o =>
{
var lastWhereMessage = "";
var filtered = ((IEnumerable <object>)o).Where(
a => filter.Matches(a, out lastWhereMessage));
string message;
source.Matches(filtered, out message);
return message + " where " + lastWhereMessage;
}
));
}
/// <summary>
/// Given an actual, does it meet the predicate
/// </summary>
public bool Matches(object actual, out string message)
{
var messages = new List <string>();
var result = true;
foreach (var obj in ((IEnumerable <object>)actual))
{
string temp;
if (constraint.Matches(obj, out temp))
{
continue;
}
result = false;
messages.Add(temp);
}
message = string.Join(", ", messages);
return(result);
}
