4 files changed, 63 insertions, 1 deletions
diff --git a/src/mongo/idl/SConscript b/src/mongo/idl/SConscript
index 81625467b21..f320ffdff3c 100644
--- a/src/mongo/idl/SConscript
+++ b/src/mongo/idl/SConscript
@@ -61,6 +61,7 @@ env.CppUnitTest(
     target='idl_config_option_test',
     source=[
         'config_option_test.cpp',
+        env.Idlc('config_option_no_init_test.idl')[0],
         env.Idlc('config_option_test.idl')[0],
     ],
     LIBDEPS=[
diff --git a/src/mongo/idl/config_option_no_init_test.idl b/src/mongo/idl/config_option_no_init_test.idl
new file mode 100644
index 00000000000..5e922ed654c
--- /dev/null
+++ b/src/mongo/idl/config_option_no_init_test.idl
@@ -0,0 +1,44 @@
+#    Copyright (C) 2018-present MongoDB, Inc.
+#
+#    This program is free software: you can redistribute it and/or modify
+#    it under the terms of the Server Side Public License, version 1,
+#    as published by MongoDB, Inc.
+#
+#    This program is distributed in the hope that it will be useful,
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
+#    Server Side Public License for more details.
+#
+#    You should have received a copy of the Server Side Public License
+#    along with this program. If not, see 
+#    <http://www.mongodb.com/licensing/server-side-public-license>.
+#
+#    As a special exception, the copyright holders give permission to link the 
+#    code of portions of this program with the OpenSSL library under certain
+#    conditions as described in each individual source file and distribute
+#    linked combinations including the program with the OpenSSL library. You 
+#    must comply with the Server Side Public License in all respects for 
+#    all of the code used other than as permitted herein. If you modify file(s)
+#    with this exception, you may extend this exception to your version of the 
+#    file(s), but you are not obligated to do so. If you do not wish to do so, 
+#    delete this exception statement from your version. If you delete this
+#    exception statement from all source files in the program, then also delete
+#    it in the license file.
+#
+
+global:
+  cpp_namespace: "mongo::test"
+  configs:
+    source: [ cli, ini, yaml ]
+    initializer:
+      register: addIDLTestConfigs
+      store: storeIDLTestConfigs
+
+configs:
+  "test.config.noInit.opt1":
+    description: "Basic option using explicit call register/store"
+    short_name: testConfigNoInitOpt1
+    arg_vartype: String
+    cpp_vartype: std::string
+    cpp_varname: gTestConfigNoInitOpt1
+
diff --git a/src/mongo/idl/config_option_test.cpp b/src/mongo/idl/config_option_test.cpp
index 640bf1b6ef3..9e94434da85 100644
--- a/src/mongo/idl/config_option_test.cpp
+++ b/src/mongo/idl/config_option_test.cpp
@@ -31,6 +31,7 @@
 
 #include "mongo/platform/basic.h"
 
+#include "mongo/idl/config_option_no_init_test_gen.h"
 #include "mongo/idl/config_option_test_gen.h"
 #include "mongo/unittest/unittest.h"
 #include "mongo/util/cmdline_utils/censor_cmdline_test.h"
@@ -614,6 +615,22 @@ TEST(ConfigOption, Opt17) {
     ASSERT_OPTION_SET<std::int32_t>(okParse, "test.config.opt17", kTestConfigOpt17Minimum);
 }
 
+TEST(ConfigOptionNoInit, Opt1) {
+    moe::OptionSection options("Options");
+    ASSERT_OK(addIDLTestConfigs(&options));
+
+    const std::vector<std::string> argv({
+        "mongod", "--testConfigNoInitOpt1", "Hello",
+    });
+    moe::Environment parsed;
+    ASSERT_OK(moe::OptionsParser().run(options, argv, {}, &parsed));
+    ASSERT_OK(parsed.validate());
+    ASSERT_OK(storeIDLTestConfigs(parsed));
+
+    ASSERT_OPTION_SET<std::string>(parsed, "test.config.noInit.opt1", "Hello");
+    ASSERT_EQ(gTestConfigNoInitOpt1, "Hello");
+}
+
 }  // namespace
 }  // namespace test
 }  // namespace mongo
diff --git a/src/mongo/idl/config_option_test.idl b/src/mongo/idl/config_option_test.idl
index d5eaf220195..325f5eec321 100644
--- a/src/mongo/idl/config_option_test.idl
+++ b/src/mongo/idl/config_option_test.idl
@@ -32,7 +32,7 @@ global:
   - "mongo/idl/server_parameter_with_storage_test.h"
   - "mongo/idl/config_option_test.h"
   configs:
-    initializer_name: TestConfigs
+    initializer: TestConfigs
 
 configs:
   "test.config.opt1":