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<h2>String Constraints (NUnit 2.4)</h2>
<p>String constraints perform tests that are specific to strings.
Attempting to test a non-string value with a string constraint
is an error and gives an exception.
<p>The <b>Text</b> prefix is deprecated beginning with NUnit 2.5.1
and will be removed in NUnit 3.0.
<h3>SubstringConstraint</h3>
<h4>Action</h4>
<p>Tests for a substring.
<h4>Constructor</h4>
<div class="code"><pre>
SubstringConstraint(string expected)
</pre></div>
<h4>Syntax</h4>
<div class="code"><pre>
Is.StringContaining(string expected)
Contains.Substring(string expected)
ContainsSubstring(string expected)
Contains(string expected)
[Obsolete] Text.Contains(string expected)
[Obsolete] Text.DoesNotContain(string expected)
</pre></div>
<h4>Modifiers</h4>
<div class="code"><pre>
...IgnoreCase
</pre></div>
<h4>Examples of Use</h4>
<div class="code"><pre>
string phrase = "Make your tests fail before passing!"
Assert.That( phrase, Is.StringContaining( "tests fail" ) );
Assert.That( phrase, Contains.Substring( "tests fail" ) );
Assert.That( phrase, Is.Not.StringContaining( "tests pass" ) );
Assert.That( phrase, Is.StringContaining( "make" ).IgnoreCase );
Expect (phrase, Contains.Substring( "make" ).IgnoreCase );
</pre></div>
<h4>Notes</h4>
<ol>
<li><b>ContainsSubstring</b> and <b>Contains</b> may appear only in the
body of a constraint expression or when the inherited syntax is used.
<li><b>Contains</b> is not actually a string constraint but is converted
to one when a string is being tested.
</ol>
<h3>StartsWithConstraint</h3>
<h4>Action</h4>
<p>Tests for an initial string.
<h4>Constructor</h4>
<div class="code"><pre>
StartsWithConstraint(string expected)
</pre></div>
<h4>Syntax</h4>
<div class="code"><pre>
Is.StringStarting(string expected)
StartsWith(string expected)
[Obsolete] Text.StartsWith(string expected)
[Obsolete] Text.DoesNotStartWith(string expected)
</pre></div>
<h4>Modifiers</h4>
<div class="code"><pre>
...IgnoreCase
</pre></div>
<h4>Examples of Use</h4>
<div class="code"><pre>
string phrase = "Make your tests fail before passing!"
Assert.That( phrase, Is.StringStarting( "Make" ) );
Assert.That( phrase, Is.Not.StringStarting( "Break" ) );
Assert.That( phrase, Has.Length.GreaterThan(10)
.And.Not.StartsWith( "Break" ) );
Expect( phrase, StartsWith( "Make" ) );
</pre></div>
<h4>Notes</h4>
<ol>
<li><b>StartsWith</b> may appear only in the body of a constraint
expression or when the inherited syntax is used.
</ol>
<h3>EndsWithConstraint</h3>
<h4>Action</h4>
<p>Tests for an ending string.
<h4>Constructor</h4>
<div class="code"><pre>
EndsWithConstraint(string expected)
</pre></div>
<h4>Syntax</h4>
<div class="code"><pre>
Is.StringEnding(string expected)
EndsWith(string expected)
[Obsolete] Text.EndsWith(string expected)
[Obsolete] Text.DoesNotEndWith(string expected)
</pre></div>
<h4>Modifiers</h4>
<div class="code"><pre>
...IgnoreCase
</pre></div>
<h4>Examples of Use</h4>
<div class="code"><pre>
string phrase = "Make your tests fail before passing!"
Assert.That( phrase, Is.StringEnding( "!" ) );
Assert.That( phrase, Is.StringEnding( "PASSING!" ).IgnoreCase );
Expect( phrase, EndsWith( "!" ) );
</pre></div>
<h4>Notes</h4>
<ol>
<li><b>EndsWith</b> may appear only in the body of a constraint
expression or when the inherited syntax is used.
</ol>
<h3>RegexConstraint</h3>
<h4>Action</h4>
<p>Tests that a pattern is matched.
<h4>Constructor</h4>
<div class="code"><pre>
RegexConstraint(string pattern)
</pre></div>
<h4>Syntax</h4>
<div class="code"><pre>
Is.StringMatching(string pattern)
Matches(string pattern)
[Obsolete] Text.Matches(string pattern)
[Obsolete] Text.DoesNotMatch(string pattern)
</pre></div>
<h4>Modifiers</h4>
<div class="code"><pre>
...IgnoreCase
</pre></div>
<h4>Examples of Use</h4>
<div class="code"><pre>
string phrase = "Make your tests fail before passing!"
Assert.That( phrase, Is.StringMatching( "Make.*tests.*pass" ) );
Assert.That( phrase, Is.Not.StringMatching( "your.*passing.*tests" ) );
Assert.That( phrase, Has.Length.GreaterThan(10)
.And.Not.Matches( "your.*passing.*tests" ) );
Expect( phrase, Matches( "Make.*pass" ) );
</pre></div>
<h4>Notes</h4>
<ol>
<li><b>Matches</b> may appear only in the body of a constraint
expression or when the inherited syntax is used.
</ol>
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