Enterprise Library Test Guide - Willy .Net

20
Enterprise Library Test Guide
Test case Result Automated test
Verify that the
class that implements
the IItem
interface notifies
the instrumentation
when it
calculates a total
price.
Passed The following test case verifies that the Item Categories
Calcuated/sec performance counter is incremented when
the CalculateTotal method calculates the total price for the
SoftwareItem object. The GetCounterValue method returns
the current counter value of the countername parameter.
[TestMethod]
public void VerifyItemCalculatedPerfCounter()
{
string counterName = "Item Categories Calculated/
sec";
int initialCount = GetCounterValue(counterName, "Total");
ItemProviderFactory factory = new ItemProviderFactory();
SoftwareItem item = (SoftwareItem)factory.
Create("IE7");
item.CalculateTotal();
int loggedCount = GetCounterValue(counterName, "Total");
Assert.IsTrue((loggedCount - initialCount) == 1);
}
In the following example, the quantity is set to zero for the CommonItem
named MicrosoftXP. The CommonItem class throws
an exception if the quantity is less than or equal to zero. This
test case verifies that when an exception is thrown, an error is
logged to the event log through the instrumentation provider.
[TestMethod]
public void VerifyErrorLoggedToEventLog()
{
using (EventLog log = new EventLog("Application"))
{
int initialCount = log.Entries.Count;
ItemProviderFactory factory = new ItemProviderFactory();
IItem item = factory.Create("MicrosoftXP");
item.CalculateTotal();
int finalCount = log.Entries.Count;
Assert.IsTrue(finalCount - initialCount == 1);
Assert.IsTrue(log.Entries[finalCount - 1].Message.
Contains("The quantity value should be greater than
zero"));
Assert.IsTrue(log.Entries[finalCount - 1].Source.
Equals("Enterprise Library Test"));
}
}