1 // ***********************************************************************
2 // Copyright (c) 2008 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 /// Operator used to test for the presence of a named Property
33 /// on an object and optionally apply further tests to the
34 /// value of that property.
36 public class PropOperator : SelfResolvingOperator
38 private readonly string name;
41 /// Gets the name of the property to which the operator applies
49 /// Constructs a PropOperator for a particular named property
51 public PropOperator(string name)
55 // Prop stacks on anything and allows only
56 // prefix operators to stack on it.
57 this.left_precedence = this.right_precedence = 1;
61 /// Reduce produces a constraint from the operator and
62 /// any arguments. It takes the arguments from the constraint
63 /// stack and pushes the resulting constraint on it.
65 /// <param name="stack"></param>
66 public override void Reduce(ConstraintBuilder.ConstraintStack stack)
68 if (RightContext == null || RightContext is BinaryOperator)
69 stack.Push(new PropertyExistsConstraint(name));
71 stack.Push(new PropertyConstraint(name, stack.Pop()));