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From chewbra...@apache.org
Subject [08/50] [abbrv] couch commit: updated refs/heads/1963-eunit-bigcouch to 08c6f0b
Date Fri, 29 Aug 2014 20:43:10 GMT
Port 120-stats-collect.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/23152539
Tree: http://git-wip-us.apache.org/repos/asf/couchdb-couch/tree/23152539
Diff: http://git-wip-us.apache.org/repos/asf/couchdb-couch/diff/23152539

Branch: refs/heads/1963-eunit-bigcouch
Commit: 231525398042038e2720779bf39455dbf0d57404
Parents: 657fd6b
Author: Alexander Shorin <kxepal@apache.org>
Authored: Mon May 26 23:57:38 2014 +0400
Committer: Russell Branca <chewbranca@apache.org>
Committed: Fri Aug 29 13:42:23 2014 -0700

----------------------------------------------------------------------
 test/couchdb/couch_stats_tests.erl | 193 ++++++++++++++++++++++++++++++++
 1 file changed, 193 insertions(+)
----------------------------------------------------------------------


http://git-wip-us.apache.org/repos/asf/couchdb-couch/blob/23152539/test/couchdb/couch_stats_tests.erl
----------------------------------------------------------------------
diff --git a/test/couchdb/couch_stats_tests.erl b/test/couchdb/couch_stats_tests.erl
new file mode 100644
index 0000000..aaaa687
--- /dev/null
+++ b/test/couchdb/couch_stats_tests.erl
@@ -0,0 +1,193 @@
+% 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(couch_stats_tests).
+
+-include("couch_eunit.hrl").
+-include_lib("couchdb/couch_db.hrl").
+
+-define(TIMEOUT, 1000).
+-define(SLEEPTIME, 100).
+
+
+setup_collector() ->
+    couch_stats_collector:start(),
+    ok.
+
+teardown_collector(_) ->
+    couch_stats_collector:stop(),
+    ok.
+
+
+couch_stats_collector_test_() ->
+    {
+        "CouchDB stats collector tests",
+        {
+            foreach,
+            fun setup_collector/0, fun teardown_collector/1,
+            [
+                should_increment_counter(),
+                should_decrement_counter(),
+                should_increment_and_decrement_counter(),
+                should_record_absolute_values(),
+                should_clear_absolute_values(),
+                should_track_process_count(),
+                should_increment_counter_multiple_times_per_pid(),
+                should_decrement_counter_on_process_exit(),
+                should_decrement_for_each_track_process_count_call_on_exit(),
+                should_return_all_counters_and_absolute_values(),
+                should_return_incremental_counters(),
+                should_return_absolute_values()
+            ]
+        }
+    }.
+
+
+should_increment_counter() ->
+    ?_assertEqual(100,
+        begin
+            AddCount = fun() -> couch_stats_collector:increment(foo) end,
+            repeat(AddCount, 100),
+            couch_stats_collector:get(foo)
+        end).
+
+should_decrement_counter() ->
+    ?_assertEqual(67,
+        begin
+            AddCount = fun() -> couch_stats_collector:increment(foo) end,
+            RemCount = fun() -> couch_stats_collector:decrement(foo) end,
+            repeat(AddCount, 100),
+            repeat(RemCount, 33),
+            couch_stats_collector:get(foo)
+        end).
+
+should_increment_and_decrement_counter() ->
+    ?_assertEqual(0,
+        begin
+            AddCount = fun() -> couch_stats_collector:increment(foo) end,
+            RemCount = fun() -> couch_stats_collector:decrement(foo) end,
+            repeat(AddCount, 100),
+            repeat(RemCount, 25),
+            repeat(AddCount, 10),
+            repeat(RemCount, 5),
+            repeat(RemCount, 80),
+            couch_stats_collector:get(foo)
+        end).
+
+should_record_absolute_values() ->
+    ?_assertEqual(lists:seq(1, 15),
+        begin
+            lists:map(fun(Val) ->
+                couch_stats_collector:record(bar, Val)
+            end, lists:seq(1, 15)),
+            couch_stats_collector:get(bar)
+        end).
+
+should_clear_absolute_values() ->
+    ?_assertEqual(nil,
+        begin
+            lists:map(fun(Val) ->
+                couch_stats_collector:record(bar, Val)
+            end, lists:seq(1, 15)),
+            couch_stats_collector:clear(bar),
+            couch_stats_collector:get(bar)
+        end).
+
+should_track_process_count() ->
+    ?_assertMatch({_, 1}, spawn_and_count(1)).
+
+should_increment_counter_multiple_times_per_pid() ->
+    ?_assertMatch({_, 3}, spawn_and_count(3)).
+
+should_decrement_counter_on_process_exit() ->
+    ?_assertEqual(2,
+        begin
+            {Pid, 1} = spawn_and_count(1),
+            spawn_and_count(2),
+            RefMon = erlang:monitor(process, Pid),
+            Pid ! sepuku,
+            receive
+                {'DOWN', RefMon, _, _, _} -> ok
+            after ?TIMEOUT ->
+                throw(timeout)
+            end,
+            % sleep for awhile to let collector handle the updates
+            % suddenly, it couldn't notice process death instantly
+            timer:sleep(?SLEEPTIME),
+            couch_stats_collector:get(hoopla)
+        end).
+
+should_decrement_for_each_track_process_count_call_on_exit() ->
+    ?_assertEqual(2,
+        begin
+            {_, 2} = spawn_and_count(2),
+            {Pid, 6} = spawn_and_count(4),
+            RefMon = erlang:monitor(process, Pid),
+            Pid ! sepuku,
+            receive
+                {'DOWN', RefMon, _, _, _} -> ok
+            after ?TIMEOUT ->
+                throw(timeout)
+            end,
+            timer:sleep(?SLEEPTIME),
+            couch_stats_collector:get(hoopla)
+        end).
+
+should_return_all_counters_and_absolute_values() ->
+    ?_assertEqual([{bar,[1.0,0.0]}, {foo,1}],
+        begin
+            couch_stats_collector:record(bar, 0.0),
+            couch_stats_collector:record(bar, 1.0),
+            couch_stats_collector:increment(foo),
+            lists:sort(couch_stats_collector:all())
+        end).
+
+should_return_incremental_counters() ->
+    ?_assertEqual([{foo,1}],
+        begin
+            couch_stats_collector:record(bar, 0.0),
+            couch_stats_collector:record(bar, 1.0),
+            couch_stats_collector:increment(foo),
+            lists:sort(couch_stats_collector:all(incremental))
+        end).
+
+should_return_absolute_values() ->
+    ?_assertEqual([{bar,[1.0,0.0]}, {zing, "Z"}],
+        begin
+            couch_stats_collector:record(bar, 0.0),
+            couch_stats_collector:record(bar, 1.0),
+            couch_stats_collector:record(zing, 90),
+            couch_stats_collector:increment(foo),
+            lists:sort(couch_stats_collector:all(absolute))
+        end).
+
+
+spawn_and_count(N) ->
+    Self = self(),
+    Pid = spawn(fun() ->
+        lists:foreach(
+            fun(_) ->
+                couch_stats_collector:track_process_count(hoopla)
+            end, lists:seq(1,N)),
+        Self ! reporting,
+        receive
+            sepuku -> ok
+        end
+    end),
+    receive reporting -> ok end,
+    {Pid, couch_stats_collector:get(hoopla)}.
+
+repeat(_, 0) ->
+    ok;
+repeat(Fun, Count) ->
+    Fun(),
+    repeat(Fun, Count-1).


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