181 lines
6.4 KiB
HTML
181 lines
6.4 KiB
HTML
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<a href="http://www.nunit.org">NUnit</a>
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<script language="JavaScript" src="codeFuncs.js" ></script> <!-- Do it this way for IE -->
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<h3>TestCaseAttribute (NUnit 2.5)</h3>
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<p><b>TestCaseAttribute</b> serves the dual purpose of marking a method with
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parameters as a test method and providing inline data to be used when
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invoking that method. Here is an example of a test being run three
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times, with three different sets of data:
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<div class="code">
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<pre>[TestCase(12,3,4)]
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[TestCase(12,2,6)]
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[TestCase(12,4,3)]
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public void DivideTest(int n, int d, int q)
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{
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Assert.AreEqual( q, n / d );
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}
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</pre>
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</div>
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<p><b>Note:</b> Because arguments to .NET attributes are limited in terms of the
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Types that may be used, NUnit will make some attempt to convert the supplied
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values using <b>Convert.ChangeType()</b> before supplying it to the test.
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<p><b>TestCaseAttribute</b> may appear one or more times on a test method,
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which may also carry other attributes providing test data, such as the
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<a href="factories.html">FactoriesAttribute</a>.
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The method may optionally be marked with the
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<a href="test.html">TestAttribute</a> as well.
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<p>By using the named parameter <b>Result</b> this test set may be simplified
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further:
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<div class="code">
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<pre>[TestCase(12,3, Result=4)]
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[TestCase(12,2, Result=6)]
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[TestCase(12,4, Result=3)]
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public int DivideTest(int n, int d)
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{
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return( n / d );
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}
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</pre>
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</div>
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<p>In the above example, NUnit checks that the return
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value of the method is equal to the expected result provided on the attribut
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<p><b>TestCaseAttribute</b> supports a number of additional
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named parameters, which may be used as follows:
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<dl>
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<dt><b>Description</b>
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<dd>Sets the description property of the test
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<dt><b>ExpectedException</b>
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<dd>Specifies a the Type of an exception that should be thrown by this invocation
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<dt><b>ExpectedExceptionName</b>
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<dd>Specifies a the FullName of an exception that should be thrown by this invocation
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<dt><b>ExpectedMessage</b>
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<dd>Specifies the message text of the expected exception
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<dt><b>MatchType</b>
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<dd>A <b>MessageMatch</b> enum value indicating how to test the expected message
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(See <a href="exception.html">ExpectedExceptionAttribute</a>)
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<dt><b>Result</b>
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<dd>The expected result to be returned from the method, which must have
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a compatible return type.
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<dt><b>TestName</b>
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<dd>Provides a name for the test. If not specified, a name is generated based on
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the method name and the arguments provided.
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<dt><b>Ignore</b>
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<dd>Set to true in order to ignore the individual test case.
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<dt><b>IgnoreReason</b>
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<dd>Specifies the reason for ignoring this test case. If set to a non-empty
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string, then Ignore is assumed to be true.
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</dl>
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<h3>Order of Execution</h3>
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<p>In NUnit 2.5, individual test cases are sorted alphabetically and executed in
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that order. With NUnit 2.5.1, the individual cases are not sorted, but are
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executed in the order in which NUnit discovers them. This order does <b>not</b>
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follow the lexical order of the attributes and will often vary between different
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compilers or different versions of the CLR.
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<p>As a result, when <b>TestCaseAttribute</b> appears multiple times on a method
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or when other data-providing attributes are used in combination with
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<b>TestCaseAttribute</b>, the order of the test cases is undefined.
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