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" The Happy Path Should Always Pass I arrived at work one morning to see an e-mail message from Adam, a software developer on my team, saying that he had checked in code for the new component he was working on over the weekend and that he would like me to do some ad-hoc testing as soon as the build came out My schedule was tight, but I was excited about finally being able to test the component In fact, I had already written down a few dozen test cases I wanted to try out based on the discussions we had had during the design review Later that morning, the build was released to the test team and I installed the application on my test computer I immediately went to the portion of the application containing Adam's new functionality, entered some data, and clicked one of the buttons.

public BeanType setProperty(PropType newValue){ this.property = newValue; return this; };

WITH CustGroups AS ( SELECT custid, (SELECT CAST(empid AS VARCHAR(10)) + ';' AS [text()] FROM (SELECT DISTINCT empid FROM dbo.Orders AS O WHERE O.custid = C.custid) AS D ORDER BY empid FOR XML PATH('')) AS CustEmps FROM dbo.Customers AS C ) SELECT custid, CASE WHEN CustEmps IS NULL THEN NULL ELSE MIN(custid) OVER(PARTITION BY CustEmps) END AS grp FROM CustGroups ORDER BY grp, custid;

It didn't work It didn't do anything I wasn't trying to see how the feature reacted to bad data I was using simple inputs that should always work I refer to simple inputs that should always work as "the happy path" Because the happy path should always work, I immediately assumed that I must have made a mistake (I knew I went through setup too fast I must have missed selecting an option) I had a second "clean" computer in my office, so I took some time to carefully install the application on this computer I didn't notice anything that seemed like it would affect this feature, so I guessed that my test computer must have had some stale files on it that caused the feature not to work Unfortunately, after starting the application again, I had the same results I must be doing something wrong.

I got out of my chair and walked down the hall I stopped at a few offices where fellow testers were working and asked if I could borrow their computer for a minute Try as I might, I couldn't find a computer where the new feature worked at all Finally, I went back to my office and called Adam and told him the bad news When I described to him what I had been doing for the last hour, he said, "Hmm, I made a change just before checking the files in, but didn't think that change would make a.

Subsequent backups, however, are very quick indeed, because WHS rapidly calculates which blocks of data have changed and only backs up the changed blocks.

isInstanceOfType method 104 105 item draggable 476, 478 template 473 ItemCommand event 436 itemTemplate tag 475 itemTemplateParentId attribute 475 iterations property 362 iterator 312

5

Earlier in this chapter, I mentioned that T-SQL supports a nonstandard syntax for modifying data based on a join, and I showed DELETE examples. Here I'll cover UPDATEs based on joins, focusing on cases where the nonstandard syntax has advantages over the supported standard syntax. I'll show that SQL Server 2005 introduces simpler alternatives that practically eliminate the need for the older UPDATE syntax that uses joins. I'll start with one of the cases where an UPDATE based on a join had a performance advantages over the standard UPDATE supported by T-SQL. Suppose you wanted to update the shipping information for orders placed by USA customers, overwriting the ShipCountry, ShipRegion, and ShipCity attributes with the customer's Country, Region, and City attributes from the Customers table. You could use one subquery for each of the new attribute values, plus one in the WHERE clause to filter orders placed by USA customers as follows: USE Northwind; BEGIN TRAN UPDATE dbo.Orders SET ShipCountry = (SELECT C.Country FROM dbo.Customers AS C WHERE C.CustomerID = dbo.Orders.CustomerID), ShipRegion = (SELECT C.Region FROM dbo.Customers AS C WHERE C.CustomerID = dbo.Orders.CustomerID), ShipCity = (SELECT C.City FROM dbo.Customers AS C WHERE C.CustomerID = dbo.Orders.CustomerID) WHERE CustomerID IN (SELECT CustomerID FROM dbo.Customers WHERE Country = 'USA'); ROLLBACK TRAN

protected void AddDVDsToListBox() { this.ListBoxProducts.Items.Add("DVDthis.ListBoxProducts.Items.Add("DVDthis.ListBoxProducts.Items.Add("DVDthis.ListBoxProducts.Items.Add("DVD}

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