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
29 namespace NUnit.Framework.Constraints
32 /// NotConstraint negates the effect of some other constraint
34 public class NotConstraint : PrefixConstraint
37 /// Initializes a new instance of the <see cref="NotConstraint"/> class.
39 /// <param name="baseConstraint">The base constraint to be negated.</param>
40 public NotConstraint(IConstraint baseConstraint)
41 : base(baseConstraint)
43 this.DescriptionPrefix = "not";
47 /// Test whether the constraint is satisfied by a given value
49 /// <param name="actual">The value to be tested</param>
50 /// <returns>True for if the base constraint fails, false if it succeeds</returns>
51 public override ConstraintResult ApplyTo<TActual>(TActual actual)
53 var baseResult = BaseConstraint.ApplyTo(actual);
54 return new ConstraintResult(this, baseResult.ActualValue, !baseResult.IsSuccess);
57 // TODO: May need a special result type