Enterprise Library Test Guide - Willy .Net

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Enterprise Library Test Guide
Verification
Running the test case again after applying the preceding code verified that the application
block could retrieve configuration information from the dictionary configuration
source.
Testing the Exception Handling Application Block
The test case determined whether the Exception Handling Application Block logged
the information retrieved by the .NET Framework Exception.Data property. This
property gets a collection of key/value pairs that provide additional, user-defined
information about an exception.
Test Case
The test case created an Exception object and added additional information to the
Data collection. The test case used the ExceptionPolicy.HandleException method
and checked to see whether the additional information, in addition to the exception,
was logged.
Problem
The test case failed because the additional information was not logged. The LoggingExceptionHandler.HandlerException
method passes the exception message and
the stack trace but not the additional information that is stored in the Data collection.
Therefore, this information is not logged. The following is the code that caused the
failure.
public Exception HandleException(Exception exception, Guid handlingInstanceId)
{
WriteToLog(CreateMessage(exception, handlingInstanceId));
return exception;
}
Solution
The WriteToLog method was modified. A new parameter named exception.Data was
added to the method signature. This parameter passes the additional information.
Also, within the WriteToLog method, code was added that enumerated the Data
collection and added that information to the ExtendedProperties collection of the
LogEntry instance. The following is the modified code.
public Exception HandleException(Exception exception, Guid handlingInstanceId)
{
WriteToLog(CreateMessage(exception, handlingInstanceId), exception.Data);
return exception;
}
protected virtual void WriteToLog(string logMessage, IDictionary exceptionData)
{
…
foreach (DictionaryEntry dataEntry in exceptionData)