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• does not require access to the source code and degrades gracefully with decreasing amount of debug information available in the input classes.

• can instrument individual .class files or entire .jars (in place, if desired). Efficient coverage subset filtering is possible, too.

• Makefile and ANT build integration are supported on equal footing.

• The runtime overhead of added instrumentation is small (5–20%) and the bytecode instrumentor itself is very fast (mostly limited by file I/O speed). Memory overhead is a few hundred bytes per Java class.

• EMMA is 100% pure Java, has no external library dependencies, and works in any Java 2 JVM (even 1.2.x).

Serenity is an open-source tool creating better-automated software acceptance tests in less time. It and measures and reports Java code coverage. It also generates easy-to-understand reports that describe what the application does and how it works, including which tests were run and what requirements were met. It works with Selenium WebDriver, Appium, and BDD tools.

Major code metrics such as cyclometric complexity, stability, abstractness, and distance from main are measured. The report data is persisted to an object database and made available via Jenkins/Hudson. The interface visually replicates the Eclipse IDE interface.

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