Test Guide

Making the invisible visible since 1987

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  • Blog Post: Brent's Favorite Bug

    This bug is my favorite mostly because of how my experience with it transformed my career. It was 1998. I was a middle manager for a platform called CDO, Collaboration Data Objects . The API’s were to allow Application Developers to build fantastic workflow tools on top on Exchange Server. The...
  • Blog Post: JMike's Favorite Bug

    I found this bug while working as one of the first QA engineers at the MathWorks (makers of MATLAB and Simulink technical computing software) in the early 1990s. ANSI standard 754 mandates rounding and such behavior for real finite-precision floating-point arithmetic. But there is no standard -- at...
  • Blog Post: Mohan Sagar's Favorite Bug

    I am working as a SharePoint QA. We developed the Status Reports project. It is basically used to collect the weekly status for all the projects. You are allowed to submit the status for any project only if you are a member or owner of that particular project. Each project has a project category dropdown...
  • Blog Post: John's Favorite Bug

    This particular one is more of a hardware defect than a software defect but it's a good story nonetheless. I was working at a major company that had just gotten into the PC business. This was early in my career. We had been shipped a prototype of their new computer that was about to hit the market...
  • Blog Post: Denise Signer's Favorite Bug

    Earlier this semester my capstone (= senior project) group wanted to print a 30-page Word 2007 document we'd been working on for a couple months. After struggling with the ink and paper issues of two printers, we finally held the document in our hands. But while we flipped through it, we noticed that...
  • Blog Post: Raman's Favorite Bug

    We were seeing weird issues for Microsoft Systems Management Server's (SMS) Software Update Reports like sometimes the reports would show a negative number of compliant machines or a negative number of machines where Updates had been downloaded. The customer requirement was that the number of computers...
  • Blog Post: Corey's Favorite Bug

    My favorite bug was an issue that would cause a test hang on roughly 1 machine in 100 running overnight stress. All the test threads would get stuck making TCP connections, and we’d see the same memory signature in the kernel heap which indicated one of hundreds of kernel threads had written to a wrong...
  • Blog Post: John Mac Millan's Favorite Bug

    I was testing a radar system that controlled the guns and missile launchers on a naval combat ship. The radar system consisted of a Fore subsystem, Aft subsystem and a Weapons subsystem. After several months of testing we discovered that if we started the subsystems in a certain sequence the Fore guns...
  • Blog Post: Sumit Kalra's Favorite Bug

    Our application (web based) is built in .Net and Infragistics. It has 6 modules. One module is similar to product management, in this we need to enter product title, product details, etc. Newly created product names appear on the homepage. So while testing, in the "Product Title" field I entered this...
  • Blog Post: Thelma Whitehorton's Favorite Bug

    The one that says that it is erasing my old email when it really isn't! I like to erase old email. For some reason the web mail I am using will not allow me to delete my old email. One day I spent over an hour attempting to delete old email, when I realized the old email had not been deleted at all...
  • Blog Post: Donny Liu's Favorite Bug

    Our team uses a web-based tool to test our product. In one page, we can input tree-like structured data. In some conditions, we have to create a child under one node of that tree by clicking a drop-down list to select the type of the child object. The amazing thing is, we have to click many times to...
  • Blog Post: Sherry Chupka's Favorite Bug

    In one application there is a small line of whitespace between a custom toolbar and the menu; clicking this whitespace causes an unhandled exception due to a null pointer. I found this by accident just trying to access certain options. This is my favorite because I like finding unexpected bugs. -...
  • Blog Post: The Bug Craig Will Never Forget

    Of all the bugs I've came across I'll never forget this one because it was so severe and easy to miss. Later, when I was a Test Lead it was the first thing I added to my sign-off checklist… A few years ago, our product was practically out the door when we learned that setup would fail if the computer...
  • Blog Post: The Bug That Makes Craig Laugh Every Time

    When my first test manager left Microsoft he told the team this was his favorite bug and it is easy to see why (testers are often asked about their favorite bugs when they leave). On his first week on the job one of my friends hit a crash in the speech recognition engine. He had no idea what to do next...
  • Blog Post: Tom Whalen's Favorite Bug

    The most interesting recent bug was a Vista upgrade error that was initially assigned to my component. We had a couple of Watson reports where the symptom was there would be an error logged during upgrade which caused a fatal error and a roll-back. Unfortunately there was no more information present...
  • Blog Post: Anutthara's Favorite Bug

    There was this bug that I remember even 4 years later now. Since we expect our users to install our product on operating systems of different languages, we do globalization testing on this. So for the Beta release, I installed our product on a Japanese (JPN) Windows 2003 (W2K3) box and tested that the...
  • Blog Post: Bruce Shankle's Favorite Bug

    During Windows 95, I was a beta tester. It was the first time I'd seen a 'Recycle' bin on a Microsoft platform. (We had some undelete functionality in DOS that required you to know the first letter of the file you wanted to undelete on the FAT file system. Sometimes it worked pretty well, but I digress...
  • Blog Post: Vamshidar Rawal's Other Favorite Bug

    Problem: Release To Web (RTW) for Office Online site and we were seeing features breaking randomly with no reason at all. A lot of debugging led to no indication of what the problem was. Cause: Testing features before RTW, testers did not catch the issue and also our test environments had not really...
  • Blog Post: One Of Vamshidar Rawal's Favorite Bugs

    Problem: We had instrumented our code to spit out timing markers at various points of pages that were tracked via automation and measured actual end-user download times 24/7 on the production site. The results showed that 25% of the time the download times were in the excess of 20 Seconds and it did...
  • Blog Post: Jurgen Appelo's Favorite Bug

    My favorite bugs are the errors that generate themselves recursively. I have two examples: The first involved an error logging mechanism that logged each exception in a database. At some point our database started throwing exceptions because the disk on the database server was nearly full. These exceptions...
  • Blog Post: Xu's Favorite Bug

    I was happy after I upgraded my laptop's memory from 1GB to 2GB until I noticed that sometimes XP just won't shut down when I try to hibernate. It sits there at "Save personal setting" forever. One day I put it to hibernate and before I saw it shutdown, I put it in my notebook bag and went home. After...
  • Blog Post: Scott Banning's Possibly Most Frustrating Bug

    I opened a bug 1.5 years ago about an issue where the product would stop displaying updates to the user in a rare scenario dealing with boundaries; we have gotten customer reports about a similar issue that could be the same root cause and are linked to the bug. Unfortunately we were very close to shipping...
  • Blog Post: Siderite's Favorite Bug

    My favourite bugs come not from our code, but from the code of the things we depend on, like the javascript engine or the .Net framework. Either performance, unexpected behaviour or plain and simple errors in code really throw one off when trying to determine what they did wrong. My favourite bug comes...
  • Blog Post: Jeetendra Kukreja's Favorite Bug (2 of 2)

    So, I am typing some value for a file name in the project palette in my product and I happen to type an invalid character in there which I don’t know about. I click on a button in the UI that should bring up a popup. Clicking on the button commits my change to the file name (since I didn’t hit enter...
  • Blog Post: Jeetendra Kukreja's Favorite Bug (1 of 2)

    The XAML editor would not show up if the user did not have admin access – Most dev’s and testers have full admin rights on theirs dev boxes so this would not have been caught unless the automation in the lab specifically ran on a user account with restricted access. Not too much drama involved here since...
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