Enterprise Library Test Guide - Willy .Net

Testing the Logging Application Block 89
Code test case Implemented? Feature that is implemented
Verify that the
application block
validates the input
at all of its entry
points.
Yes
For example, the Tracer class that traces the log methods
first validates the LogWriter object before it starts
to trace a method. An invalid input causes an exception.
This is shown in the following code example.
public Tracer(…, LogWriter writer, …)
{
if (writer == null) throw new ArgumentNullExcep
tion("writer", …);
}
Verify that the
errors that occur
during a logging
operation are
logged to the errors
special trace
source, if it is in
the configuration
source.
Verify that the
application block
can log information
to multiple trace
sources.
Yes
Yes
For example, in the following code, if the missingCategories
category is not in the configuration source, the
application block logs an error to the errors special trace
source that is in the configuration source.
private void ReportMissingCategories(List missingCategories, LogEntry logEntry)
{
…
structureHolder.ErrorsTraceSource.TraceData(…);
…
}
The Logger.Write method calls the LogWriter.Process-
Log private method. This method logs the information
to multiple trace sources. This is shown in the following
code example.
private void ProcessLog(LogEntry log)
{
…
foreach (LogSource traceSource in matching-
TraceSources)
{
…
traceSource.TraceData(…);
…
}
}
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