Add a few more lines to test_grid_search_results():

Eugene Chen · raghavrv · commit 5d998f235c9f · 2016-09-08T14:47:13.000+02:00
1. check test_rank_score always &gt;= 1
    2. check all regular scores (test/train_mean/std_score) and timing &gt;= 0
    3. check all regular scores &lt;= 1
Note that timing can be greater than 1 in general, and std of regular scores
always &lt;= 1 because the scores are bounded between 0 and 1.
diff --git a/sklearn/model_selection/tests/test_search.py b/sklearn/model_selection/tests/test_search.py
@@ -659,6 +659,13 @@ def test_grid_search_results():
     for search, iid in zip((grid_search, grid_search_iid), (False, True)):
         assert_equal(iid, search.iid)
         results = search.cv_results_
+        # Check if score and timing are reasonable
+        assert_true(all(results['test_rank_test_score'] >= 1))
+        assert_true(all(results[k] >= 0) for k in score_keys
+                    if k is not 'rank_test_score')
+        assert_true(all(results[k] <= 1) for k in score_keys
+                    if not k.endswith('time') and
+                    k is not 'rank_test_score')
         # Check results structure
         check_cv_results_array_types(results, param_keys, score_keys)
         check_cv_results_keys(results, param_keys, score_keys, n_candidates)
