Implement a server-side config service interface.

luci_config/server/cfgclient/naming_test.go

Index: luci_config/server/cfgclient/naming_test.go
diff --git a/luci_config/server/cfgclient/naming_test.go b/luci_config/server/cfgclient/naming_test.go
new file mode 100644
index 0000000000000000000000000000000000000000..aa5c3bc94cff84fcba255a59586d61d2a37f6694
--- /dev/null
+++ b/luci_config/server/cfgclient/naming_test.go
@@ -0,0 +1,27 @@
+// Copyright 2016 The LUCI Authors. All rights reserved.
+// Use of this source code is governed under the Apache License, Version 2.0
+// that can be found in the LICENSE file.
+
+package cfgclient
+
+import (
+	"testing"
+
+	"github.com/luci/gae/impl/memory"
+
+	"golang.org/x/net/context"
+
+	. "github.com/smartystreets/goconvey/convey"
+)
+
+func TestServiceConfigSet(t *testing.T) {
+	t.Parallel()
+
+	Convey(`With a testing AppEngine context`, t, func() {
+		c := memory.Use(context.Background())
+
+		Convey(`Can get the current service config set.`, func() {
+			So(CurrentServiceConfigSet(c), ShouldEqual, "services/app")
+		})
+	})
+}