The test coverage analysis is summarized with a percentage of 66.67%. To get further insights, we can click on the percentage and obtain a coverage analysis for the two subdirectories, as follows:

By browsing the subdirectory links, we can inspect the test coverage percentage for individual files, and can even browse a line-by-line summary (for example, src/sum_integers.cpp):

The green lines have been traversed when running the test suite, whereas the red lines have not. Through this, we can not only identify unused/untested code (with the function sum_integers_unused) but can also see how often each line has been traversed. For instance, the code line sum += i has been visited 1,005 times (5 times during test_short, and 1,000 times during test_long). Test coverage analysis is an indispensable companion to automated testing, and CDash provides us with an interface to browse and analyze the results graphically in the browser.