It is useful to record the version number of all the packages on
which your visual test cases depend. A note containing a version
number is added to the DESCRIPTION file for each dependency.
Dependencies on svglite and ggplot2 are automatically added. In
addition, add_dependency() can be called in any testthat
file to manually add a dependency to a package.
Usage
add_dependency(deps)
Arguments
deps
A vector containing the names of the packages for which
a dependency should be added.