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| 24 |
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| 25 | <div id="content">
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| 26 |
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| 27 | <h2>Parameterized Tests</h2>
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| 28 |
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| 29 | <p>NUnit 2.5 supports parameterized tests. Test methods
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| 30 | may have parameters and various attributes are available
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| 31 | to indicate what arguments should be supplied by NUnit.
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| 32 |
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| 33 | <p>Multiple sets of arguments cause the creation of multiple
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| 34 | tests. All arguments are created at the point of loading the
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| 35 | tests, so the individual test cases are available for
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| 36 | display and selection in the Gui, if desired.
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| 37 |
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| 38 | <p>Some attributes allow you to specify arguments inline - directly on
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| 39 | the attribute - while others use a separate method, property or field
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| 40 | to hold the arguments. In addition, some attributes identify complete test cases,
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| 41 | including all the necessary arguments, while others only provide data
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| 42 | for a single argument. This gives rise to four groups of attributes,
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| 43 | as shown in the following table.
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| 44 |
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| 45 | <table class="nunit">
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| 46 | <tr><th></th><th>Complete Test Cases</th><th>Data for One Argument</th></tr>
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| 47 | <tr><th>Inline</th>
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| 48 | <td><a href="testCase.html">TestCaseAttribute</a></td>
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| 49 | <td><a href="random.html">RandomAttribute</a><br>
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| 50 | <a href="range.html">RangeAttribute</a><br>
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| 51 | <a href="values.html">ValuesAttribute</a></td></tr>
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| 52 | <tr><th>Separate</th>
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| 53 | <td><a href="testCaseSource.html">TestCaseSourceAttribute</a></td>
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| 54 | <td><a href="valueSource.html">ValueSourceAttribute</a></td></tr>
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| 55 | </table>
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| 56 |
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| 57 | <p>In addition, when data is specified for individual arguments, special attributes
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| 58 | may be added to the test method itself in order to tell NUnit how
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| 59 | to go about combining the arguments. Currently, the following attributes
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| 60 | are provided:
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| 61 |
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| 62 | <ul>
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| 63 | <li><a href="combinatorial.html">CombinatorialAttribute</a> (default)
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| 64 | <li><a href="pairwise.html">PairwiseAttribute</a><li><a href="sequential.html">SequentialAttribute</a></ul>
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| 65 |
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| 66 | <h3>Order of Execution</h3>
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| 67 |
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| 68 | <p>In NUnit 2.5, individual test cases are sorted alphabetically and executed in
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| 69 | that order. With NUnit 2.5.1, the individual cases are not sorted, but are
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| 70 | executed in the order in which NUnit discovers them. This order does <b>not</b>
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| 71 | follow the lexical order of the attributes and will often vary between different
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| 72 | compilers or different versions of the CLR.
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| 73 |
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| 74 | <p>The following specific rules for ordering apply:
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| 75 | <ol>
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| 76 | <li>If all arguments are specified in a <b>single TestCaseSource</b> attribute,
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| 77 | the ordering of the cases provided will be maintained.
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| 78 | <li>If each parameter has a <b>single Values</b>, <b>ValueSource</b> or
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| 79 | <b>Range</b> attribute and the <b>Sequential</b> combining strategy
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| 80 | is used - or there is only one argument - the ordering will be maintained.
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| 81 | <li>In all other cases, including using multiple <b>TestCase</b> attributes
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| 82 | or a combination of different types of attributes, the ordering of the
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| 83 | test cases is undefined.
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| 84 | </ol>
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