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.Reflection;
31 using NUnit.Compatibility;
33 namespace NUnit.Framework.Constraints
36 /// InstanceOfTypeConstraint is used to test that an object
37 /// is of the same type provided or derived from it.
39 public class InstanceOfTypeConstraint : TypeConstraint
42 /// Construct an InstanceOfTypeConstraint for the type provided
44 /// <param name="type">The expected Type</param>
45 public InstanceOfTypeConstraint(Type type)
46 : base(type, "instance of ")
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 "InstanceOf"; } }
59 /// Apply the constraint to an actual value, returning true if it succeeds
61 /// <param name="actual">The actual argument</param>
62 /// <returns>True if the constraint succeeds, otherwise false.</returns>
63 protected override bool Matches(object actual)
65 return actual != null && expectedType.IsInstanceOfType(actual);