extra/digraphs/digraphs-tests.factor

   1 USING: digraphs kernel sequences tools.test ;
   2 IN: digraphs.tests
   3
   4 : test-digraph ( -- digraph )
   5     <digraph>
   6     { { "one" 1 } { "two" 2 } { "three" 3 } { "four" 4 } { "five" 5 } }
   7     [ first2 pick add-vertex ] each
   8     { { "one" "three" } { "one" "four" } { "two" "three" } { "two" "one" } { "three" "four" } }
   9     [ first2 pick add-edge ] each ;
  10
  11 { 5 } [ test-digraph topological-sort length ] unit-test