Test coverage of Julia scripts

Required software

• the julia package 'Coverage'

Pkg.add("Coverage")

• the shell command lcov

sudo apt install lcov

Analysis the test coverage

• Assume that we have a script quadtree.jl inside src which includes some test code.
• Run the script with the julia option --code-coverage
• The generated .cov can be directly opened with a text editor and the numbers in the first column indicates how often a given line was executed.

julia  --code-coverage -e  'include("src/quadtree.jl")'

• For a more graphical representation, convert the file in the lcov format.

julia -e 'using Coverage; LCOV.writefile("lcov.info", process_file("src/quadtree.jl"))'

• Produce a summary and generate a HTML report of the test coverage

lcov --summary lcov.info
genhtml -o res lcov.info
firefox res/index.html &

• Clean-up

rm src/quadtree.jl.*.cov