Enterprise Library Test Guide - Willy .Net

94
Enterprise Library Test Guide
Code test case Implemented? Feature that is implemented
Verify that the application
block exposes
a dictionary
collection property
so that the application
block can log
customized logging
information.
Yes
Verify that the
logging application
block can log the
same message to
multiple categories.
Verify that the
application block
logs messages to
the trace listeners
in a thread safe
manner.
Verify that the performance
counters
and the event log
that are required
by the application
block are installed
during installation.
Yes
Yes
Yes
The LogEntry.ExtendedProperties property is a dictionary
collection that supports customized logging information.
This is shown in the following code example.
private IDictionary extended-
Properties;
public IDictionary Extended-
Properties
{
get
{
if (extendedProperties == null)
{
extendedProperties = new Dictionary();
}
return this.extendedProperties;
}
set { this.extendedProperties = value; }
}
The LogEntry class has a categories collection that allows
the application block to log a message to multiple
categories. This is shown in the following code example.
private ICollection categories
The LogSource class verifies that the trace listeners are
thread safe before it logs the information. This is shown
in the following code example.
public void TraceData(…)
{
try
{
if (!listener.IsThreadSafe)
Monitor.Enter(listener);
listener.TraceData(…);
}
finally
{
if (!listener.IsThreadSafe)
Monitor.Exit(listener);
}
}
For example, the LoggingInstrumentationListener class
contains the installer attribute type [HasInstallableResourcesAttribute].
The EventLogInstallerBuilder and PerformanceCounterInstallerBuilder
installer classes, which are part of
the Enterprise Library Core, recognize this attribute and
install the performance counters and event logs.