1 // ***********************************************************************
2 // Copyright (c) 2011 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
31 namespace NUnit.Framework.Constraints
34 /// ExceptionTypeConstraint is a special version of ExactTypeConstraint
35 /// used to provided detailed info about the exception thrown in
38 public class ExceptionTypeConstraint : ExactTypeConstraint
41 /// Constructs an ExceptionTypeConstraint
43 public ExceptionTypeConstraint(Type type) : base(type) { }
46 /// Applies the constraint to an actual value, returning a ConstraintResult.
48 /// <param name="actual">The value to be tested</param>
49 /// <returns>A ConstraintResult</returns>
50 public override ConstraintResult ApplyTo<TActual>(TActual actual)
52 Exception castedToException = actual as Exception;
54 if (actual != null && castedToException == null)
55 throw new ArgumentException("Actual value must be an Exception", "actual");
57 actualType = actual == null ? null : actual.GetType();
59 return new ExceptionTypeConstraintResult(this, actual, actualType, this.Matches(actual));
62 #region Nested Result Class
63 class ExceptionTypeConstraintResult : ConstraintResult
65 private readonly object caughtException;
67 public ExceptionTypeConstraintResult(ExceptionTypeConstraint constraint, object caughtException, Type type, bool matches)
68 : base(constraint, type, matches)
70 this.caughtException = caughtException;
73 public override void WriteActualValueTo(MessageWriter writer)
75 if (this.Status == ConstraintStatus.Failure)
77 Exception ex = caughtException as Exception;
81 base.WriteActualValueTo(writer);
85 writer.WriteActualValue(ex);