1 // ***********************************************************************
2 // Copyright (c) 2008 Charlie Poole
3 //
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:
11 //
12 // The above copyright notice and this permission notice shall be
13 // included in all copies or substantial portions of the Software.
14 //
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 // ***********************************************************************
23 
24 using System;
25 using System.Collections;
26 #if CLR_2_0 || CLR_4_0
27 using System.Collections.Generic;
28 #endif
29 using System.Reflection;
30 using NUnit.Framework.Api;
31 using NUnit.Framework.Extensibility;
32 using NUnit.Framework.Internal;
33 
34 namespace NUnit.Framework.Builders
35 {
36     /// <summary>
37     /// CombinatorialStrategy creates test cases by using all possible
38     /// combinations of the parameter data.
39     /// </summary>
40     public class CombinatorialStrategy : CombiningStrategy
41     {
42         /// <summary>
43         /// Initializes a new instance of the <see cref="CombinatorialStrategy"/> class.
44         /// </summary>
45         /// <param name="sources">The sources.</param>
CombinatorialStrategy(IEnumerable[] sources)46         public CombinatorialStrategy(IEnumerable[] sources) : base(sources) { }
47 
48         /// <summary>
49         /// Gets the test cases generated by the CombiningStrategy.
50         /// </summary>
51         /// <returns>The test cases.</returns>
52 #if CLR_2_0 || CLR_4_0
GetTestCases()53         public override IEnumerable<ITestCaseData> GetTestCases()
54         {
55             List<ITestCaseData> testCases = new List<ITestCaseData>();
56 #else
57         public override IEnumerable GetTestCases()
58         {
59             ArrayList testCases = new ArrayList();
60 #endif
61             IEnumerator[] enumerators = new IEnumerator[Sources.Length];
62             int index = -1;
63 
64             for (; ; )
65             {
66                 while (++index < Sources.Length)
67                 {
68                     enumerators[index] = Sources[index].GetEnumerator();
69                     if (!enumerators[index].MoveNext())
70 						return testCases;
71                 }
72 
73                 object[] testdata = new object[Sources.Length];
74 
75                 for (int i = 0; i < Sources.Length; i++)
76                     testdata[i] = enumerators[i].Current;
77 
78                 ParameterSet parms = new ParameterSet();
79                 parms.Arguments = testdata;
80 				testCases.Add(parms);
81 
82                 index = Sources.Length;
83 
84                 while (--index >= 0 && !enumerators[index].MoveNext()) ;
85 
86                 if (index < 0) break;
87             }
88 
89 			return testCases;
90         }
91     }
92 }
93