Actually run some tests.

Carreau · Carreau · commit 0f7f262484c2 · 2018-09-01T14:12:24.000-07:00
The ipdoctest was relying on the side-effects of applying `map()` which is lazy since Python3. Moving to an actual for loop. Closes #11276
diff --git a/IPython/testing/ipunittest.py b/IPython/testing/ipunittest.py
@@ -146,7 +146,8 @@ class Tester(unittest.TestCase):
             def test(self):
                 # Make a new runner per function to be tested
                 runner = DocTestRunner(verbose=d2u.verbose)
-                map(runner.run, d2u.finder.find(func, func.__name__))
+                for the_test in d2u.finder.find(func, func.__name__):
+                    runner.run(the_test)
                 failed = count_failures(runner)
                 if failed:
                     # Since we only looked at a single function's docstring,
