The automated testing pyramid says that organizations should focus on automation primarily of low-level tests, such as unit tests. It's great to have lots of automated unit tests, but how good are those tests, really, at managing risk? One way to measure that is using code coverage metrics. In this recorded One Key Idea webinar, Rex demonstrates the use of a basic, free tool, gcov, which is part of the Linux suite of development tools, to measure statement and branch coverage. .