eiri commented on a change in pull request #650: Remove some sleeps from change 
feed test.
URL: https://github.com/apache/couchdb/pull/650#discussion_r125935115
 
 

 ##########
 File path: src/couch/test/couch_changes_tests.erl
 ##########
 @@ -837,6 +843,27 @@ wait_finished({_, ConsumerRef}) ->
         ]})
     end.
 
+
+reset_row_notifications() ->
+    receive
+        row ->
+            reset_row_notifications()
+    after 0 ->
+        ok
+    end.
+
+
+wait_row_notifications(N) ->
+    receive
+        row when N == 1 ->
+            ok;
+        row when N > 1 ->
+            wait_row_notifications(N - 1)
+    after ?TIMEOUT ->
+        timeout
 
 Review comment:
   I'd say `throw` here or raise an error, going to be less confusing than 
none-match crash in the test's logs in case of the actual timeout. pause and 
unpause do creative `?assertNotEqual(timeout, Resp),` for the same effect.
 
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