Acceptance test-driven development (ATDD) means different things to different people based on their experiences—from "It's all about testing" to "It has nothing to do with testing,” and from "TDD, ATDD—it's all the same" to "TDD and ATDD are nothing alike." These nine landmarks will help you navigate ATDD no matter where you are coming from.

As a test professional in waterfall, I was used to getting the code much later and buggier than I expected and being under tremendous pressure to finish my testing before the go-live date hit. Then one day, I found out that there was a better way. Testers could be involved much earlier in the lifecycle, they could participate in requirements and design decisions as they happened, and the code could actually be unit tested before I received it! Heaven? Nope, agile.

Because tests are commonly viewed in terms of offering quantitative feedback on the presence or absence of defects in specific situations, Good Unit Tests need to both illustrate and define the behavioral contract of the unit in question. Do you have GUTs?

Computer security has raised the demand for automated tools that can analyze source code for vulnerabilities and defects. Find out how you can put automated static analyzers to work for you.