ިsgxdZddlZddlZddlmZdZddZedddZdZ d Z d Z d Z d Z d ZdZy)z4Unit tests for the sparsifier computation functions.N)py_random_statect|jt|jk(sJ|jD]5\}}|j||sJ|s||||||||k(r5Jt t j ||}t t j ||}|jD]:}|jD]%}||vs|||vs|||||||zkr%J<y)a*Test whether a spanner is valid. This function tests whether the given spanner is a subgraph of the given graph G with the same node set. It also tests for all shortest paths whether they adhere to the given stretch. Parameters ---------- G : NetworkX graph The original graph for which the spanner was constructed. spanner : NetworkX graph The spanner to be tested. stretch : float The proclaimed stretch of the spanner. weight : object The edge attribute to use as distance. weightN)setnodesedgeshas_edgedictnxshortest_path_length)Gspannerstretchruvoriginal_lengthspanner_lengths ]/var/www/html/venv/lib/python3.12/site-packages/networkx/algorithms/tests/test_sparsifiers.py _test_spannerr s, qwwy>S1 11 1 <1zz!Q 1:a=(AaDGFO; ;;< 2221VDEO"11'&IJN WWYO OAO#_Q-?(?%a(+w9KA9N/NNNN OOcf|jD]\}}|j|||d< y)aBAssigns random weights to the edges of a graph. Parameters ---------- G : NetworkX graph The original graph for which the spanner was constructed. seed : integer, random_state, or None (default) Indicator of random number generation state. See :ref:`Randomness`. rN)r random)rseedrrs r_assign_random_weightsr2s5 *1 KKM!Q*rctjd}tj|dt}|jD]\}}|j ||rJy)z&Test a trivial spanner with stretch 1.rrN)r complete_graphr_seedr r )rrrrs rtest_spanner_trivialr#DsQ "AjjAE*G&11%%%&rctjd}tj|dt}t ||dtj|dt}t ||dy)z9Test spanner construction on a complete unweighted graph.rr N)r r!rr"rrrs r&test_spanner_unweighted_complete_graphr(MsN "AjjAE*G!Wa jjBU+G!Wb!rctjd}t|ttj|ddt}t ||ddtj|ddt}t ||ddy) z7Test spanner construction on a complete weighted graph.rr r%rrrrr&N)r r!rr"rrr's r$test_spanner_weighted_complete_graphr+Xs` "A15)jjAhU;G!Wa1jjBxer?sY: * $ON**"&" 3" 3"r