From fd01541d77ca1455c603c411f395d6ce34fab6f1 Mon Sep 17 00:00:00 2001
From: Eddie Louie <eddie.louie@mongodb.com>
Date: Tue, 1 Aug 2017 20:15:42 -0400
Subject: SERVER-29506 Require $changeNotification to be the first stage.

This reverts commit babab967892f81f3107903cb41672503de791998.
---
 src/mongo/db/pipeline/document_source_mock.h | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

(limited to 'src/mongo/db/pipeline/document_source_mock.h')

diff --git a/src/mongo/db/pipeline/document_source_mock.h b/src/mongo/db/pipeline/document_source_mock.h
index 9236e55ad62..513994cd599 100644
--- a/src/mongo/db/pipeline/document_source_mock.h
+++ b/src/mongo/db/pipeline/document_source_mock.h
@@ -48,9 +48,15 @@ public:
     const char* getSourceName() const override;
     Value serialize(
         boost::optional<ExplainOptions::Verbosity> explain = boost::none) const override;
-    InitialSourceType getInitialSourceType() const override {
-        return InitialSourceType::kInitialSource;
+
+    StageConstraints constraints() const override {
+        StageConstraints constraints;
+        constraints.requiredPosition = StageConstraints::PositionRequirement::kFirst;
+        constraints.requiresInputDocSource = false;
+        constraints.isAllowedInsideFacetStage = false;
+        return constraints;
     }
+
     BSONObjSet getOutputSorts() override {
         return sorts;
     }
-- 
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