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| 5 | <title>NUnit - ConditionConstraints</title>
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| 23 | <!-- End of Header -->
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| 24 |
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| 25 | <div id="content">
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| 26 |
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| 27 | <h2>Condition Constraints (NUnit 2.4)</h2>
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| 28 |
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| 29 | <p>ConditionConstraints test a specific condition and are named for the condition
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| 30 | they test. They verify that the actual value satisfies the condition. The
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| 31 | following condition helpers are provided.
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| 32 |
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| 33 | <h3>NullConstraint</h3>
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| 34 |
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| 35 | <h4>Action</h4>
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| 36 | <p>Tests that a value is Null.
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| 37 |
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| 38 | <h4>Constructor</h4>
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| 39 | <div class="code"><pre>
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| 40 | NullConstraint()
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| 41 | </pre></div>
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| 42 |
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| 43 | <h4>Syntax</h4>
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| 44 | <div class="code"><pre>
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| 45 | Is.Null
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| 46 | </pre></div>
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| 47 |
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| 48 | <h4>Examples of Use</h4>
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| 49 | <div class="code"><pre>
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| 50 | Assert.That( anObject, Is.Null );
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| 51 | Assert.That( anObject, Is.Not.Null );
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| 52 | </pre></div>
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| 53 |
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| 54 | <h3>TrueConstraint</h3>
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| 55 |
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| 56 | <h4>Action</h4>
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| 57 | <p>Tests that a value is true.
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| 58 |
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| 59 | <h4>Constructor</h4>
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| 60 | <div class="code"><pre>
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| 61 | TrueConstraint()
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| 62 | </pre></div>
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| 63 |
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| 64 | <h4>Syntax</h4>
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| 65 | <div class="code"><pre>
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| 66 | Is.True
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| 67 | </pre></div>
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| 68 |
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| 69 | <h4>Example of Use</h4>
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| 70 | <div class="code"><pre>
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| 71 | Assert.That( condition, Is.True );
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| 72 | </pre></div>
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| 73 |
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| 74 | <h3>FalseConstraint</h3>
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| 75 |
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| 76 | <h4>Action</h4>
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| 77 | <p>Tests that a value is false.
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| 78 |
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| 79 | <h4>Constructor</h4>
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| 80 | <div class="code"><pre>
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| 81 | FalseConstraint()
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| 82 | </pre></div>
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| 83 |
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| 84 | <h4>Syntax</h4>
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| 85 | <div class="code"><pre>
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| 86 | Is.False
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| 87 | </pre></div>
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| 88 |
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| 89 | <h4>Example of Use</h4>
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| 90 | <div class="code"><pre>
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| 91 | Assert.That( condition, Is.False );
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| 92 | </pre></div>
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| 93 |
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| 94 | <h3>NaNConstraint</h3>
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| 95 |
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| 96 | <h4>Action</h4>
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| 97 | <p>Tests that a value is floating-point NaN.
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| 98 |
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| 99 | <h4>Constructor</h4>
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| 100 | <div class="code"><pre>
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| 101 | NaNConstraint()
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| 102 | </pre></div>
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| 103 |
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| 104 | <h4>Syntax</h4>
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| 105 | <div class="code"><pre>
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| 106 | Is.NaN
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| 107 | </pre></div>
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| 108 |
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| 109 | <h4>Examples of Use</h4>
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| 110 | <div class="code"><pre>
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| 111 | Assert.That( aDouble, Is.NaN );
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| 112 | Assert.That( aDouble, Is.Not.NaN );
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| 113 | </pre></div>
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| 114 |
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| 115 | <h3>EmptyConstraint</h3>
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| 116 |
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| 117 | <h4>Action</h4>
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| 118 | <p>Tests that an object is an empty string, directory or collection.
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| 119 |
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| 120 | <h4>Constructor</h4>
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| 121 | <div class="code"><pre>
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| 122 | EmptyConstraint()
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| 123 | </pre></div>
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| 124 |
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| 125 | <h4>Syntax</h4>
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| 126 | <div class="code"><pre>
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| 127 | Is.Empty
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| 128 | </pre></div>
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| 129 |
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| 130 | <h4>Examples of Use</h4>
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| 131 | <div class="code"><pre>
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| 132 | Assert.That( aString, Is.Empty );
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| 133 | Assert.Thst( dirInfo, Is.Empty );
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| 134 | Assert.That( collection, Is.Empty );
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| 135 | </pre></div>
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| 136 |
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| 137 | <h4>Notes</h4>
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| 138 | <ol>
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| 139 | <li><b>EmptyConstraint</b> creates and uses either an <b>EmptyStringConstraint</b>,
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| 140 | <b>EmptyDirectoryConstraint</b> or <b>EmptyCollectionConstraint</b> depending on
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| 141 | the argument tested.
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| 142 | <li>A <b>DirectoryInfo</b> argument is required in order to test for an empty directory.
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| 143 | To test whether a string represents a directory path, you must first construct
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| 144 | a <b>DirectoryInfo</b>.
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| 145 | </ol>
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| 146 |
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| 147 | <h3>UniqueItemsConstraint</h3>
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| 148 |
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| 149 | <h4>Action</h4>
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| 150 | <p>Tests that an array, collection or other IEnumerable is composed
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| 151 | of unique items with no duplicates.
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| 152 |
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| 153 | <h4>Constructor</h4>
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| 154 | <div class="code"><pre>
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| 155 | UniqueItemsConstraint()
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| 156 | </pre></div>
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| 157 |
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| 158 | <h4>Syntax</h4>
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| 159 | <div class="code"><pre>
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| 160 | Is.Unique
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| 161 | </pre></div>
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| 162 |
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| 163 | <h4>Example of Use</h4>
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| 164 |
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| 165 | <div class="code"><pre>
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| 166 | Assert.That( collection, Is.Unique );
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| 167 | </pre></div>
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| 168 | </div>
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| 169 |
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| 170 | <!-- Submenu -->
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| 171 | <div id="subnav">
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| 172 | <ul>
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| 173 | <li><a href="index.html">NUnit 2.5.10</a></li>
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| 174 | <ul>
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| 175 | <li><a href="getStarted.html">Getting Started</a></li>
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| 176 | <li><a href="assertions.html">Assertions</a></li>
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| 177 | <li><a href="constraintModel.html">Constraints</a></li>
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| 178 | <ul>
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| 179 | <li><a href="equalConstraint.html">Equal Constraint</a></li>
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| 180 | <li><a href="sameasConstraint.html">SameAs Constraint</a></li>
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| 181 | <li id="current"><a href="conditionConstraints.html">Condition Constraints</a></li>
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| 182 | <li><a href="comparisonConstraints.html">Comparison Constrants</a></li>
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| 183 | <li><a href="pathConstraints.html">Path Constraints</a></li>
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| 184 | <li><a href="typeConstraints.html">Type Constraints</a></li>
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| 185 | <li><a href="stringConstraints.html">String Constraints</a></li>
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| 186 | <li><a href="collectionConstraints.html">Collection Constraints</a></li>
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| 187 | <li><a href="propertyConstraint.html">Property Constraint</a></li>
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| 188 | <li><a href="throwsConstraint.html">Throws Constraint</a></li>
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| 189 | <li><a href="compoundConstraints.html">Compound Constraints</a></li>
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| 190 | <li><a href="delayedConstraint.html">Delayed Constraint</a></li>
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| 191 | <li><a href="listMapper.html">List Mapper</a></li>
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| 192 | <li><a href="reusableConstraint.html">Reusable Constraint</a></li>
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| 193 | </ul>
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| 194 | <li><a href="attributes.html">Attributes</a></li>
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| 195 | <li><a href="runningTests.html">Running Tests</a></li>
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| 208 | Copyright © 2010 Charlie Poole. All Rights Reserved.
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