1 // ***********************************************************************
2 // Copyright (c) 2007 Charlie Poole
4 // Permission is hereby granted, free of charge, to any person obtaining
5 // a copy of this software and associated documentation files (the
6 // "Software"), to deal in the Software without restriction, including
7 // without limitation the rights to use, copy, modify, merge, publish,
8 // distribute, sublicense, and/or sell copies of the Software, and to
9 // permit persons to whom the Software is furnished to do so, subject to
10 // the following conditions:
12 // The above copyright notice and this permission notice shall be
13 // included in all copies or substantial portions of the Software.
15 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
18 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
19 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
20 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
21 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
22 // ***********************************************************************
25 #define NUNIT_FRAMEWORK
30 using System.Collections;
32 namespace NUnit.Framework.Constraints
35 /// NoItemConstraint applies another constraint to each
36 /// item in a collection, failing if any of them succeeds.
38 public class NoItemConstraint : PrefixConstraint
41 /// Construct a SomeItemsConstraint on top of an existing constraint
43 /// <param name="itemConstraint"></param>
44 public NoItemConstraint(IConstraint itemConstraint)
45 : base(itemConstraint)
47 DescriptionPrefix = "no item";
51 /// The display name of this Constraint for use by ToString().
52 /// The default value is the name of the constraint with
53 /// trailing "Constraint" removed. Derived classes may set
54 /// this to another name in their constructors.
56 public override string DisplayName { get { return "None"; } }
59 /// Apply the item constraint to each item in the collection,
60 /// failing if any item fails.
62 /// <param name="actual"></param>
63 /// <returns></returns>
64 public override ConstraintResult ApplyTo<TActual>(TActual actual)
66 if (!(actual is IEnumerable))
67 throw new ArgumentException("The actual value must be an IEnumerable", "actual");
69 foreach (object item in (IEnumerable)actual)
70 if (BaseConstraint.ApplyTo(item).IsSuccess)
71 return new ConstraintResult(this, actual, ConstraintStatus.Failure);
73 return new ConstraintResult(this, actual, ConstraintStatus.Success);