NUnit.Framework.Constraints.MessageWriter

MessageWriter

public abstract class MessageWriter : StringWriter

MessageWriter is the abstract base for classes that write constraint descriptions and messages in some form. The class has separate methods for writing various components of a message, allowing implementations to tailor the presentation as needed.

public abstract int MaxLineLength { get; set; }

Abstract method to get the max line length

protected MessageWriter()

Construct a MessageWriter given a culture

public abstract void DisplayDifferences(ConstraintResult result)

Display Expected and Actual lines for a constraint. This is called by MessageWriter's default implementation of WriteMessageTo and provides the generic two-line display.

public abstract void DisplayDifferences(object expected, object actual)

Display Expected and Actual lines for given values. This method may be called by constraints that need more control over the display of actual and expected values than is provided by the default implementation.

public abstract void DisplayDifferences(object expected, object actual, Tolerance tolerance)

Display Expected and Actual lines for given values, including a tolerance value on the Expected line.

public abstract void DisplayStringDifferences(string expected, string actual, int mismatch, bool ignoreCase, bool clipping)

Display the expected and actual string values on separate lines. If the mismatch parameter is >=0, an additional line is displayed line containing a caret that points to the mismatch point.

public abstract void WriteActualValue(object actual)

Writes the text for an actual value.

public abstract void WriteCollectionElements(IEnumerable collection, long start, int max)

Writes the text for a collection value, starting at a particular point, to a max length

public void WriteMessageLine(string message, object[] args)

Method to write single line message with optional args, usually written to precede the general failure message.

public abstract void WriteMessageLine(int level, string message, object[] args)

Method to write single line message with optional args, usually written to precede the general failure message, at a given indentation level.

public abstract void WriteValue(object val)

Writes the text for a generalized value.