diff options
| -rw-r--r-- | src-py/neo4j_test_util.py | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/src-py/neo4j_test_util.py b/src-py/neo4j_test_util.py index 8edac1b2..d5c30a7f 100644 --- a/src-py/neo4j_test_util.py +++ b/src-py/neo4j_test_util.py @@ -8,3 +8,37 @@ def flush_db(db_ctl): complete DB flush: remove all nodes & links """ db_ctl.exec_cypher_query('match (n) optional match (n)-[r]-() delete n,r') + + +def gen_rand_data(db_ctl, lim_n=128, lim_r=256, prob_link_create = 0.3): + """ + generate random DB data + + @return: tuple consisting of the random node,link labels generated + """ + assert 2 <= lim_n + + n_label = rand_label() + r_label = rand_label() + q_arr = ['with 0 as _', # TODO clean: foreach triggers SyntaxException: otherwise + 'foreach (rid in range(0,%d)' % (lim_n - 1), + '|', + 'create (:%s {id:rid, n_attr_0:toInt(%d * rand())}))' % (n_label, lim_n) + ] + + q = ' '.join(q_arr) + op = dbc.DBO_cypher_query(q) + db_ctl.exec_op(op) + + q_arr = ['match (s:%s),(d:%s)' % (n_label, n_label), + 'with s,d', + 'limit %d' % (lim_r - 1), + 'where rand() < %.2f' % (prob_link_create), + 'create (s)-[:%s {l_attr_0:toInt(%d * rand())}]->(d)' % (r_label,lim_r)] + + q = ' '.join(q_arr) + op = dbc.DBO_cypher_query(q) + db_ctl.exec_op(op) + + return (n_label, r_label) + |