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From chewbra...@apache.org
Subject [37/50] couch commit: updated refs/heads/1963-eunit-bigcouch to 6845303
Date Mon, 11 Aug 2014 20:20:09 GMT
Port 210-os-proc-pool.t etap test suite to eunit


Project: http://git-wip-us.apache.org/repos/asf/couchdb-couch/repo
Commit: http://git-wip-us.apache.org/repos/asf/couchdb-couch/commit/671d296d
Tree: http://git-wip-us.apache.org/repos/asf/couchdb-couch/tree/671d296d
Diff: http://git-wip-us.apache.org/repos/asf/couchdb-couch/diff/671d296d

Branch: refs/heads/1963-eunit-bigcouch
Commit: 671d296d7fef1d0c4e93cc03b927f4fc492a5534
Parents: e7299ba
Author: Alexander Shorin <kxepal@apache.org>
Authored: Sun Jun 8 13:08:50 2014 +0400
Committer: Russell Branca <chewbranca@apache.org>
Committed: Mon Aug 11 13:16:05 2014 -0700

----------------------------------------------------------------------
 test/couchdb/couchdb_os_proc_pool.erl | 179 +++++++++++++++++++++++++++++
 1 file changed, 179 insertions(+)
----------------------------------------------------------------------


http://git-wip-us.apache.org/repos/asf/couchdb-couch/blob/671d296d/test/couchdb/couchdb_os_proc_pool.erl
----------------------------------------------------------------------
diff --git a/test/couchdb/couchdb_os_proc_pool.erl b/test/couchdb/couchdb_os_proc_pool.erl
new file mode 100644
index 0000000..1bb266e
--- /dev/null
+++ b/test/couchdb/couchdb_os_proc_pool.erl
@@ -0,0 +1,179 @@
+% Licensed under the Apache License, Version 2.0 (the "License"); you may not
+% use this file except in compliance with the License. You may obtain a copy of
+% the License at
+%
+%   http://www.apache.org/licenses/LICENSE-2.0
+%
+% Unless required by applicable law or agreed to in writing, software
+% distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+% WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+% License for the specific language governing permissions and limitations under
+% the License.
+
+-module(couchdb_os_proc_pool).
+
+-include("couch_eunit.hrl").
+-include_lib("couchdb/couch_db.hrl").
+
+-define(TIMEOUT, 3000).
+
+
+start() ->
+    {ok, Pid} = couch_server_sup:start_link(?CONFIG_CHAIN),
+    couch_config:set("query_server_config", "os_process_limit", "3", false),
+    Pid.
+
+stop(Pid) ->
+    couch_server_sup:stop(),
+    erlang:monitor(process, Pid),
+    receive
+        {'DOWN', _, _, Pid, _} ->
+            ok
+    after ?TIMEOUT ->
+        throw({timeout, server_stop})
+    end.
+
+
+os_proc_pool_test_() ->
+    {
+        "OS processes pool tests",
+        {
+            setup,
+            fun start/0, fun stop/1,
+            [
+                should_block_new_proc_on_full_pool(),
+                should_free_slot_on_proc_unexpected_exit()
+            ]
+        }
+    }.
+
+
+should_block_new_proc_on_full_pool() ->
+    ?_test(begin
+        Client1 = spawn_client(),
+        Client2 = spawn_client(),
+        Client3 = spawn_client(),
+
+        ?assertEqual(ok, ping_client(Client1)),
+        ?assertEqual(ok, ping_client(Client2)),
+        ?assertEqual(ok, ping_client(Client3)),
+
+        Proc1 = get_client_proc(Client1, "1"),
+        Proc2 = get_client_proc(Client2, "2"),
+        Proc3 = get_client_proc(Client3, "3"),
+
+        ?assertNotEqual(Proc1, Proc2),
+        ?assertNotEqual(Proc2, Proc3),
+        ?assertNotEqual(Proc3, Proc1),
+
+        Client4 = spawn_client(),
+        ?assertEqual(timeout, ping_client(Client4)),
+
+        ?assertEqual(ok, stop_client(Client1)),
+        ?assertEqual(ok, ping_client(Client4)),
+
+        Proc4 = get_client_proc(Client4, "4"),
+        ?assertEqual(Proc1, Proc4),
+
+        lists:map(fun(C) ->
+            ?assertEqual(ok, stop_client(C))
+        end, [Client2, Client3, Client4])
+    end).
+
+should_free_slot_on_proc_unexpected_exit() ->
+    ?_test(begin
+        Client1 = spawn_client(),
+        Client2 = spawn_client(),
+        Client3 = spawn_client(),
+
+        ?assertEqual(ok, ping_client(Client1)),
+        ?assertEqual(ok, ping_client(Client2)),
+        ?assertEqual(ok, ping_client(Client3)),
+
+        Proc1 = get_client_proc(Client1, "1"),
+        Proc2 = get_client_proc(Client2, "2"),
+        Proc3 = get_client_proc(Client3, "3"),
+
+        ?assertNotEqual(Proc1, Proc2),
+        ?assertNotEqual(Proc2, Proc3),
+        ?assertNotEqual(Proc3, Proc1),
+
+        ?assertEqual(ok, kill_client(Client1)),
+
+        Client4 = spawn_client(),
+        ?assertEqual(ok, ping_client(Client4)),
+
+        Proc4 = get_client_proc(Client4, "4"),
+        ?assertNotEqual(Proc4, Proc1),
+        ?assertNotEqual(Proc2, Proc4),
+        ?assertNotEqual(Proc3, Proc4),
+
+        lists:map(fun(C) ->
+            ?assertEqual(ok, stop_client(C))
+        end, [Client2, Client3, Client4])
+    end).
+
+
+spawn_client() ->
+    Parent = self(),
+    Ref = make_ref(),
+    Pid = spawn(fun() ->
+        Proc = couch_query_servers:get_os_process(<<"javascript">>),
+        loop(Parent, Ref, Proc)
+    end),
+    {Pid, Ref}.
+
+ping_client({Pid, Ref}) ->
+    Pid ! ping,
+    receive
+        {pong, Ref} ->
+            ok
+    after ?TIMEOUT ->
+        timeout
+    end.
+
+get_client_proc({Pid, Ref}, ClientName) ->
+    Pid ! get_proc,
+    receive
+        {proc, Ref, Proc} -> Proc
+    after ?TIMEOUT ->
+        erlang:error({assertion_failed,
+                     [{module, ?MODULE},
+                      {line, ?LINE},
+                      {reason, "Timeout getting client "
+                               ++ ClientName ++ " proc"}]})
+    end.
+
+stop_client({Pid, Ref}) ->
+    Pid ! stop,
+    receive
+        {stop, Ref} ->
+            ok
+    after ?TIMEOUT ->
+        timeout
+    end.
+
+kill_client({Pid, Ref}) ->
+    Pid ! die,
+    receive
+        {die, Ref} ->
+            ok
+    after ?TIMEOUT ->
+        timeout
+    end.
+
+loop(Parent, Ref, Proc) ->
+    receive
+        ping ->
+            Parent ! {pong, Ref},
+            loop(Parent, Ref, Proc);
+        get_proc  ->
+            Parent ! {proc, Ref, Proc},
+            loop(Parent, Ref, Proc);
+        stop ->
+            couch_query_servers:ret_os_process(Proc),
+            Parent ! {stop, Ref};
+        die ->
+            Parent ! {die, Ref},
+            exit(some_error)
+    end.


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