The Tester Must Understand the Stack

As testers, we test a piece of software against a variety of both written and unwritten functional and nonfunctional requirements.

One of the key tools in testing that software is having an understanding of the environment under which that software will run. We need to understand the pieces of the stack. We don’t need to be experts on every bit of it, but we need to understand what components are involved, and how they work together. I’ve found that often may folks will forget about parts of the stack, which can lead to red herrings or bad information when describing a situation or troubleshooting a problem.

Full Stack Testing, by Flickr user prettyinprint

For example, in my environment I’m usually testing web applications. For a given application, the following things are in place and need to be working correctly:

  • a web server (virtual) running on a host machine (physical)
  • a database server (virtual) running on a host machine (physical)
  • external (network) storage for the database
  • a working network between all of these servers and the client machine
  • DNS servers translating names into IP addresses to access the servers
  • a load balancer managing traffic between multiple web servers
  • IIS working correctly on the application server
  • zero or more APIs that are available and working
  • a web browser on the client machine that supports JavaScript

Even with this list, there’s a chance I’ve omitted something. Depending on the testing being performed or the issue being investigated, there’s a chance that any one of these components could be the culprit. Don’t forget about the entire stack.

Image by prettyinprint, used under Creative Commons licensing

Testers Don’t Just Test the Code

Kate Falanga chimed in recently with some thoughts around titles for testers, QA folks, and the like in Exploring Testing Titles in Agile. She lays out a few good reasons why the term Quality Assurance is a bad one, mainly that the role can’t really assure quality. I believe this. Heck, in the tagline on this site I refer to “(The myth of) Quality Assurance.”

She then outlines why she doesn’t like the title of Tester, feeling that it’s not broad enough to reflect all of the work that we do, and that it’s reactive:

It gives a very reactive rather than proactive connotation. If someone is a Tester then it is assumed that something needs to be tested. If you don’t have anything to be tested then why do you need a Tester? Why include them in planning or the project at all until you have something for them to do?

Quality Assurance / Testers / Job Title Adventures

The bad assumption here is that code is the only thing being tested, and that testing is the only thing done by a tester. Sure, once there’s code being written, a tester will probably spend a majority of her time exercising that code, but the tester participates in testing activities prior to the code. Time spent in requirements discussions helps the team write better requirements or user stories. Time spent learning about the business environment or the end user’s use cases will help the tester get into the right mindset for testing activities.

These activities aren’t testing in the sense of testing new code that’s been writing, but they’re testing activities. If testing allows us to learn information about the software being tested, and we use that information to improve product quality, all methods of learning could be considered test activities, could they not?

Do we continue the search for a better title than Tester, or do we work to help the broader software industry understand that Tester doesn’t just mean exercising code changes?

Image by Ruth Hartnop, used under Creative Commons licensing

Effective Bug Reports with Pivotal Tracker

As someone who is a tester that was once an application developer, I’ve seen both sides of the bug report world: both writing them as well as being the one to receive them and have to act on the information. Here’s my take on what is included in a good bug report when using Pivotal Tracker as your system for work item tracking.

  • Story title: The title ought to give a quick, one-line indication of the issue. While many bugs require nuance and details, we need an easy way to reference this work item.
  • Story type: Bug. This one’s easy🙂
  • Description: This is the meat of the bug. Let’s explore this a bit. Note that Pivotal Tracker supports Markdown, so you can add formatting if it helps clarify the bug report.

A bug work item will provide information for three audiences: the product owner who will prioritize the importance of this fix, the developers who will be tasked with doing the work to resolve the defect, and the tester who will eventually verify that the problem is resolved.

If this was a straightforward bug, we may not need much further explanation. But there’s probably some context to be shared.

Bug - by emil_kabanov on Flickr

First, clarify what happened and why this is a bug. What did you find, and why do you think it’s a bug. How did the behavior differ from your expectations. Is the behavior directly in conflict with the behavior outlined in the feature story you’re testing? That’s an easy one. Or maybe you’re finding a consistency problem. Outline how the behavior is inconsistent. Perhaps it’s a usability issue. Why is it a problem?

Provide steps to reproduce the issue. What were the data conditions? What did you click on? What user role were you in? What job or process did you run? What browser were you using? What window size? Any of these things can be relevant for reproducing the issue. Use your best judgement as to how much detail to include.

It can also be helpful to include some severity analysis. How bad is the problem? How often will it occur, and what will be the implications if the bug isn’t fixed? While the product owner controls prioritization of the work items, we can provide information to help them make an informed decision. If the bug makes the program unusable, or causes data loss, we ought to be clear (and perhaps note elsewhere such as Slack or a face to face conversation that there’s a very severe defect to be addressed). If the bug only occurs in rare circumstances, we should note that as well. Not all bugs are showstoppers; accurate severity information will help the project team ensure we’re addressing the right work at the right time.

Include or attach supporting documentation as appropriate. For user interface issues, a screenshot is often helpful. If it’s a complex data situation involved, attaching a database test script might help.

Finally, remember that a bug report is the first step in the conversation around a work item. We may gather additional information, learn more from the development team, or alter our perspective on a defect based on changing project conditions.

image by Flickr user emil_kabanov, used under Creative Commons licensing

Pairing for Manual Configuration Tasks

During her talk last week at CAST, Natalie Bennett dropped a random tip that seems so straightforward, yet it’s not common practice anywhere I’ve worked.

The backstory: while we try to script and automate as many repetitive tasks as possible, there are any number of manual configuration tasks that are part of software development. Perhaps it’s the initial configuration of a server, or the creation of an account. The fact these tasks are done manually leaves them prone to human error, and sometimes these errors aren’t easily detected.

The other backstory: we know of pair programming, where two developers sit together to work on a bit of code, putting two brains into the design and hopefully catching errors as they occur rather than later in the process.

The solution: combine the two ideas, and when there’s manual configuration work to be done, pair for the work.

Duh. So simple, yet so smart.

Being Anal About Developer Cover Letters and Resumes

Q: Why are you such a nitpicky jerk about typos and grammar errors on the cover letters and resumes of developer candidates?

A: Because they’ve had all the resources in the world to make them perfect, and they’re applying for a job where having even a single character wrong can mean a significant difference the correctness of their work.

Curiosity Killed the Cat, But It’s the Lifeblood of a Tester

My employer partners with a local university as part of an internship program; computer science students have an opportunity to participate in a series of six month paid internships with local software development groups. As a result, we’re now about three weeks into working with our latest intern. We’ve had two previous testing interns.

It’s interesting to see how they begin testing. With each of them I’ve set things up with an introduction to context driven testing and the ideas of software exploration and working with various heuristics to exercise the program.

It’s interesting to note if the new intern has an innate curiosity to explore.

Our current intern started at the beginning of the month. On her first day, as she began to explore one of our applications, she caught a bug that appeared when you altered a URL query string.

Curiosity: the lifeblood of a tester.

CAST Vancouver, BC: Coming Soon

I’m looking forward to attending CAST next month in Vancouver, BC, which will be my first time at this particular conference. I’ve heard lots of good things from past attendees, and I look forward to what seems like a very practical lineup of folks talking bout real-world testing issues in an interactive environment.

I’ll be arriving on Sunday and attending James Bach and Fiona Charles’ tutorials on Monday.

I may try to organize some sort of Sunday evening gathering for craft beer lovers – keep an eye on Twitter.