Add TODO in snippets.test_threading

tests/snippets/test_threading.py

@@ -5,17 +5,20 @@ output = []
 
 
 def thread_function(name):
-    output.append("Thread %s: starting" % name)
+    output.append((name, 0))
     time.sleep(2.0)
-    output.append("Thread %s: finishing" % name)
+    output.append((name, 1))
 
 
-output.append("Main    : before creating thread")
+output.append((0, 0))
 x = threading.Thread(target=thread_function, args=(1, ))
-output.append("Main    : before running thread")
+output.append((0, 1))
 x.start()
-output.append("Main    : wait for the thread to finish")
+output.append((0, 2))
 x.join()
-output.append("Main    : all done")
+output.append((0, 3))
 
 assert len(output) == 6, output
+# CPython has [(1, 0), (0, 2)] for the middle 2, but we have [(0, 2), (1, 0)]
+# TODO: maybe fix this, if it turns out to be a problem?
+# assert output == [(0, 0), (0, 1), (1, 0), (0, 2), (1, 1), (0, 3)]