1 // ***********************************************************************
2 // Copyright (c) 2012 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 /// Interface for all constraints
34 public interface IConstraint : IResolveConstraint
39 /// The display name of this Constraint for use by ToString().
41 string DisplayName { get; }
44 /// The Description of what this constraint tests, for
45 /// use in messages and in the ConstraintResult.
47 string Description { get; }
50 /// Arguments provided to this Constraint, for use in
51 /// formatting the description.
53 object[] Arguments { get; }
56 /// The ConstraintBuilder holding this constraint
58 ConstraintBuilder Builder { get; set; }
65 /// Applies the constraint to an actual value, returning a ConstraintResult.
67 /// <param name="actual">The value to be tested</param>
68 /// <returns>A ConstraintResult</returns>
69 ConstraintResult ApplyTo<TActual>(TActual actual);
72 /// Applies the constraint to an ActualValueDelegate that returns
73 /// the value to be tested. The default implementation simply evaluates
74 /// the delegate but derived classes may override it to provide for
75 /// delayed processing.
77 /// <param name="del">An ActualValueDelegate</param>
78 /// <returns>A ConstraintResult</returns>
79 ConstraintResult ApplyTo<TActual>(ActualValueDelegate<TActual> del);
81 #pragma warning disable 3006
83 /// Test whether the constraint is satisfied by a given reference.
84 /// The default implementation simply dereferences the value but
85 /// derived classes may override it to provide for delayed processing.
87 /// <param name="actual">A reference to the value to be tested</param>
88 /// <returns>A ConstraintResult</returns>
89 ConstraintResult ApplyTo<TActual>(ref TActual actual);
90 #pragma warning restore 3006