Agile Testing: A Practical Guide for Testers and Agile Teams полностью

Frequently, product owners, plan administrators, or business development managers will come and ask me a question such as, “What’s the system supposed to do if someone submits a loan payment for zero dollars?” or “Why didn’t everyone in this plan get a 3% nonelective contribution?”

Showing them a FitNesse test that replicates the scenario is much more powerful than just showing them narrative requirements. Maybe the system wasn’t designed the way it should have been, but the test illustrates how it actually works, because we can clearly see the results of the inputs and operations. This has saved a lot of arguments on the level of “I thought it worked this way.”

If they decide the functionality, as implemented, is incorrect, we can change the expected outputs of the test and write a story to implement code to make the test pass again with the new expectations. You can’t do that with a requirements document.

—Lisa

Organizing the test cases and tests isn’t always straightforward. Many teams document tests and requirements on a wiki. The downside to a wiki’s flexibility is that you can end up with a jumble of hierarchies. You might have trouble finding the particular requirement or example you need.

Lisa’s team periodically revisits its wiki documentation and FitNesse tests, and refactors the way they’re organized. If you’re having trouble organizing your requirements and test cases, budget some time to research new tools that might help. Hiring a skilled technical writer is a good way to get your valuable test cases and examples into a usable repository of easy-to-find information.

Chapter 14, “An Agile Test Automation Strategy,” has more on test management.

Summary

The iteration planning session sets the tone for the whole iteration. In this chapter, we looked at what agile testers do to help kick off the iteration to a good start.

During iteration planning, testers help the team learn about the stories by asking questions and considering all viewpoints.

Task cards need to be written along with development task cards and estimated realistically.

Another way of tackling testing tasks is to write them directly on the developer task cards.

Teams should commit to the work for which they can complete all of the testing tasks, because no story is done until it’s fully tested.

The start of an iteration is the last chance to ensure that the stories are testable and that adequate test data is provided.

Testers collaborate with customers to explore stories in detail and write high-level test cases to let programmers kick off coding.

Testers review high-level tests and requirements with programmers to make sure they are communicating well.

Tests form the core of the application’s documentation.

Chapter 18 Coding and Testing

Our agile tester has helped plan the release, size stories appropriately, and make sure they’re testable. She, along with colleagues on the customer and development team, has turned examples of desired behavior for each story into high-level user acceptance tests. She and her team have lined up the resources and infrastructure needed to deliver business value. Now, team members have picked up task cards and started writing code. What do testers do next, especially before any stories are ready to test?

Driving Development

The beginning of coding is a good time to start writing detailed tests. The high-level tests written before the iteration, or in the first couple days of it, provide enough information for the programmers to start their own test-driven development. So now we have a bit of breathing room, but if we don’t move quickly, coding could get way ahead of testing and go off in the wrong direction.

Now’s the time to start writing executable tests that illustrate the details about a story in order to keep development moving forward smoothly and help testing keep pace with coding. Like the high-level tests, we base detailed tests on examples provided by the customers.

At this point, we’re mainly writing tests that will be automated, but we’re also thinking ahead to the important exploratory testing we need to do as coding is completed.

Start Simple

As testers, we’re easily distracted by interesting code smells and edge cases. However, if we’re using tests to guide coding, we have to start with the basics. Write the simplest happy path test you can in order to show that the core functionality works.