test: port 20-no-timeout from python to elixir

Author: hulkoba

test/elixir/test/config/suite.elixir

@@ -734,5 +734,8 @@
   ],
   "IgnoreDesignDocsForAllDocsIndexTests": [
     "should not return design docs"
+  ],
+  "LongRunningMangoTest": [
+    "query does not time out"
   ]
 }

test/elixir/test/mango/20_no_timeout.exs

@@ -0,0 +1,39 @@
+# 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.
+
+defmodule LongRunningMangoTest do
+  use CouchTestCase
+
+  @db_name "no-timeout"
+
+  setup do
+    MangoDatabase.recreate(@db_name)
+
+    0..100_000
+    |> Enum.reduce([], fn i, docs ->
+      docs = [%{"_id" => "#{i}", "another" => "field"} | docs]
+
+      if rem(i, 20_000) == 0 do
+        MangoDatabase.save_docs(@db_name, docs)
+        []
+      else
+        docs
+      end
+    end)
+  end
+
+  test "query does not time out" do
+    selector = %{"_id" => %{"$gt" => 0}, "another" => "wrong"}
+    {:ok, docs} = MangoDatabase.find(@db_name, selector)
+    assert docs == []
+  end
+end