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
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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 using System.Reflection;
27 using NUnit.Framework.Internal;
28 using NUnit.Framework.Extensibility;
29 using NUnit.Framework.Api;
30 
31 namespace NUnit.Framework.Builders
32 {
33     /// <summary>
34     /// CombiningStrategy is the abstract base for classes that
35     /// know how to combine values provided for individual test
36     /// parameters to create a set of test cases.
37     /// </summary>
38     public abstract class CombiningStrategy
39     {
40         private IEnumerable[] sources;
41         private IEnumerator[] enumerators;
42 
43         /// <summary>
44         /// Initializes a new instance of the <see cref="CombiningStrategy"/>
45         /// class using a set of parameter sources.
46         /// </summary>
47         /// <param name="sources">The sources.</param>
CombiningStrategy(IEnumerable[] sources)48         public CombiningStrategy(IEnumerable[] sources)
49         {
50             this.sources = sources;
51         }
52 
53         /// <summary>
54         /// Gets the sources used by this strategy.
55         /// </summary>
56         /// <value>The sources.</value>
57         public IEnumerable[] Sources
58         {
59             get { return sources; }
60         }
61 
62         /// <summary>
63         /// Gets the enumerators for the sources.
64         /// </summary>
65         /// <value>The enumerators.</value>
66         public IEnumerator[] Enumerators
67         {
68             get
69             {
70                 if (enumerators == null)
71                 {
72                     enumerators = new IEnumerator[Sources.Length];
73                     for (int i = 0; i < Sources.Length; i++)
74                         enumerators[i] = Sources[i].GetEnumerator();
75                 }
76 
77                 return enumerators;
78             }
79         }
80 
81         /// <summary>
82         /// Gets the test cases generated by the CombiningStrategy.
83         /// </summary>
84         /// <returns>The test cases.</returns>
85 #if CLR_2_0 || CLR_4_0
GetTestCases()86         public abstract System.Collections.Generic.IEnumerable<ITestCaseData> GetTestCases();
87 #else
GetTestCases()88         public abstract System.Collections.IEnumerable GetTestCases();
89 #endif
90     }
91 }
92