RDFLib / rdflib / 547

91%

Pull #473

travis-ci

make external_graph_libs tests optional (only run if ext lib is installed)

networkx shouldn't be a dependency of rdflib just to run tests. Also
graph_tool heavily depends on C libs and can't easily be installed via pip
(or via apt-get on travis).
Hence, the doctests are duplicated into proper tests that auto skip if
networkx or graph_tool can't be imported.

32 of 32 new or added lines in 1 file covered. (100.0%)

10080 of 15874 relevant lines covered (63.5%)

1.27 hits per line