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| 5 | <title>NUnit - TestCase</title>
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| 27 | <script language="JavaScript" src="codeFuncs.js" ></script> <!-- Do it this way for IE -->
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| 28 |
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| 29 | <h3>TestCaseAttribute (NUnit 2.5)</h3>
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| 30 |
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| 31 | <p><b>TestCaseAttribute</b> serves the dual purpose of marking a method with
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| 32 | parameters as a test method and providing inline data to be used when
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| 33 | invoking that method. Here is an example of a test being run three
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| 34 | times, with three different sets of data:
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| 35 |
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| 36 | <div class="code">
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| 37 | <pre>[TestCase(12,3,4)]
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| 38 | [TestCase(12,2,6)]
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| 39 | [TestCase(12,4,3)]
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| 40 | public void DivideTest(int n, int d, int q)
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| 41 | {
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| 42 | Assert.AreEqual( q, n / d );
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| 43 | }
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| 44 | </pre>
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| 45 | </div>
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| 46 |
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| 47 | <p><b>Note:</b> Because arguments to .NET attributes are limited in terms of the
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| 48 | Types that may be used, NUnit will make some attempt to convert the supplied
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| 49 | values using <b>Convert.ChangeType()</b> before supplying it to the test.
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| 50 |
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| 51 | <p><b>TestCaseAttribute</b> may appear one or more times on a test method,
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| 52 | which may also carry other attributes providing test data, such as the
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| 53 | <a href="factories.html">FactoriesAttribute</a>.
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| 54 | The method may optionally be marked with the
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| 55 | <a href="test.html">TestAttribute</a> as well.
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| 56 |
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| 57 | <p>By using the named parameter <b>Result</b> this test set may be simplified
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| 58 | further:
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| 59 |
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| 60 | <div class="code">
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| 61 | <pre>[TestCase(12,3, Result=4)]
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| 62 | [TestCase(12,2, Result=6)]
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| 63 | [TestCase(12,4, Result=3)]
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| 64 | public int DivideTest(int n, int d)
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| 65 | {
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| 66 | return( n / d );
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| 67 | }
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| 68 | </pre>
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| 69 | </div>
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| 70 |
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| 71 | <p>In the above example, NUnit checks that the return
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| 72 | value of the method is equal to the expected result provided on the attribut
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| 73 |
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| 74 | <p><b>TestCaseAttribute</b> supports a number of additional
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| 75 | named parameters, which may be used as follows:
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| 76 |
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| 77 | <dl>
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| 78 | <dt><b>Description</b>
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| 79 | <dd>Sets the description property of the test
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| 80 | <dt><b>ExpectedException</b>
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| 81 | <dd>Specifies a the Type of an exception that should be thrown by this invocation
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| 82 | <dt><b>ExpectedExceptionName</b>
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| 83 | <dd>Specifies a the FullName of an exception that should be thrown by this invocation
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| 84 | <dt><b>ExpectedMessage</b>
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| 85 | <dd>Specifies the message text of the expected exception
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| 86 | <dt><b>MatchType</b>
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| 87 | <dd>A <b>MessageMatch</b> enum value indicating how to test the expected message
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| 88 | (See <a href="exception.html">ExpectedExceptionAttribute</a>)
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| 89 | <dt><b>Result</b>
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| 90 | <dd>The expected result to be returned from the method, which must have
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| 91 | a compatible return type.
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| 92 | <dt><b>TestName</b>
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| 93 | <dd>Provides a name for the test. If not specified, a name is generated based on
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| 94 | the method name and the arguments provided.
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| 95 | <dt><b>Ignore</b>
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| 96 | <dd>Set to true in order to ignore the individual test case.
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| 97 | <dt><b>IgnoreReason</b>
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| 98 | <dd>Specifies the reason for ignoring this test case. If set to a non-empty
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| 99 | string, then Ignore is assumed to be true.
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| 100 | </dl>
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| 101 |
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| 102 | <h3>Order of Execution</h3>
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| 103 |
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| 104 | <p>In NUnit 2.5, individual test cases are sorted alphabetically and executed in
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| 105 | that order. With NUnit 2.5.1, the individual cases are not sorted, but are
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| 106 | executed in the order in which NUnit discovers them. This order does <b>not</b>
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| 107 | follow the lexical order of the attributes and will often vary between different
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| 108 | compilers or different versions of the CLR.
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| 109 |
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| 110 | <p>As a result, when <b>TestCaseAttribute</b> appears multiple times on a method
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| 111 | or when other data-providing attributes are used in combination with
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| 112 | <b>TestCaseAttribute</b>, the order of the test cases is undefined.
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| 113 |
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