asyncio, Tulip issue #136: Add get/set_debug() methods to BaseEventLoopTests.

Add also a PYTHONASYNCIODEBUG environment variable to debug coroutines since
Python startup, to be able to debug coroutines defined directly in the asyncio
module.

1 files changed, 28 insertions, 0 deletions

diff --git a/Lib/test/test_asyncio/test_tasks.py b/Lib/test/test_asyncio/test_tasks.py
index f27b952..6d03dc7 100644
--- a/Lib/test/test_asyncio/test_tasks.py
+++ b/Lib/test/test_asyncio/test_tasks.py
@@ -1,7 +1,9 @@
 """Tests for tasks.py."""
 
 import gc
+import os.path
 import unittest
+from test.script_helper import assert_python_ok
 
 import asyncio
 from asyncio import test_utils
@@ -1461,6 +1463,32 @@ class GatherTestsBase:
         cb.assert_called_once_with(fut)
         self.assertEqual(fut.result(), [3, 1, exc, exc2])
 
+    def test_env_var_debug(self):
+        path = os.path.dirname(asyncio.__file__)
+        path = os.path.normpath(os.path.join(path, '..'))
+        code = '\n'.join((
+            'import sys',
+            'sys.path.insert(0, %r)' % path,
+            'import asyncio.tasks',
+            'print(asyncio.tasks._DEBUG)'))
+
+        # Test with -E to not fail if the unit test was run with
+        # PYTHONASYNCIODEBUG set to a non-empty string
+        sts, stdout, stderr = assert_python_ok('-E', '-c', code)
+        self.assertEqual(stdout.rstrip(), b'False')
+
+        sts, stdout, stderr = assert_python_ok('-c', code,
+                                               PYTHONASYNCIODEBUG='')
+        self.assertEqual(stdout.rstrip(), b'False')
+
+        sts, stdout, stderr = assert_python_ok('-c', code,
+                                               PYTHONASYNCIODEBUG='1')
+        self.assertEqual(stdout.rstrip(), b'True')
+
+        sts, stdout, stderr = assert_python_ok('-E', '-c', code,
+                                               PYTHONASYNCIODEBUG='1')
+        self.assertEqual(stdout.rstrip(), b'False')
+
 
 class FutureGatherTests(GatherTestsBase, unittest.TestCase):