NUnit - StringConstraints

String Constraints (NUnit 2.4)

String constraints perform tests that are specific to strings. The following string constraints are provided.

Syntax Helpers Constructor Operation

Text.Contains( string )
Text.DoesNotContain( string ) SubstringConstraint( string ) tests for a substring

Text.StartsWith( string )
Text.DoesNotStartWith( string ) StartsWithConstraint( string ) tests for an initial string

Text.EndsWith( string )
Text.DoesNotEndWith( string ) EndsWithConstraint( string ) tests for an ending string

Text.Matches( string )
Text.DoesNotMatch( string ) RegexConstraint( string ) tests that a pattern is matched

Syntax Helpers	Constructor	Operation
Text.Contains( string ) Text.DoesNotContain( string )	SubstringConstraint( string )	tests for a substring
Text.StartsWith( string ) Text.DoesNotStartWith( string )	StartsWithConstraint( string )	tests for an initial string
Text.EndsWith( string ) Text.DoesNotEndWith( string )	EndsWithConstraint( string )	tests for an ending string
Text.Matches( string ) Text.DoesNotMatch( string )	RegexConstraint( string )	tests that a pattern is matched

Examples

string phrase = "Make your tests fail before passing!"

Assert.That( phrase, Text.Contains( "tests fail" ) );
Assert.That( phrase, Text.Contains( "make" ).IgnoreCase );

Assert.That( phrase, Text.StartsWith( "Make" ) );
Assert.That( phrase, Text.Not.StartsWith( "Break" ) );
Assert.That( phrase, Text.DoesNotStartWith( "Break" ) );

Assert.That( phrase, Text.EndsWith( "!" ) );
Assert.That( phrase, Text.EndsWith( "PASSING!" ).IgnoreCase );

Assert.That( phrase, Text.Matches( "Make.*tests.*pass" ) );
Assert.That( phrase, Text.Not.Matches( "your.*passing.*tests" ) );
Assert.That( phrase, Text.DoesNotMatch( "your.*passing.*tests" ) );

// Using Inheritance
Expect( phrase, Contains( "make" ).IgnoreCase );
Expect( phrase, EndsWith( "!" ) );
Expect( phrase, Matches( "Make.*pass" ) );