1 files changed, 17 insertions, 0 deletions
diff --git a/src/mongo/db/update/addtoset_node_test.cpp b/src/mongo/db/update/addtoset_node_test.cpp
index d2b7f90be65..f590c7140dc 100644
--- a/src/mongo/db/update/addtoset_node_test.cpp
+++ b/src/mongo/db/update/addtoset_node_test.cpp
@@ -99,6 +99,23 @@ TEST(AddToSetNodeTest, InitSucceedsWithArray) {
     ASSERT_OK(node.init(update["$addToSet"]["a"], expCtx));
 }
 
+TEST(AddToSetNodeTest, InitFailsWhenArgumentIsInvalidBSONArray) {
+    // Create our invalid array by creating a BSONObj with non contiguous array indexes that is then
+    // passed to the BSONArray ctor.
+    BSONObj updateArrAsObj = BSON("0"
+                                  << "foo"
+                                  << "2"
+                                  << "bar");
+    BSONArray updateArr(updateArrAsObj);
+
+    auto update = BSON("$addToSet" << BSON("fieldName" << BSON("$each" << updateArr)));
+    boost::intrusive_ptr<ExpressionContextForTest> expCtx(new ExpressionContextForTest());
+    AddToSetNode node;
+
+    ASSERT_THROWS(node.init(update["$addToSet"]["fieldName"], expCtx),
+                  ExceptionFor<ErrorCodes::BadValue>);
+}
+
 TEST(AddToSetNodeTest, InitSucceedsWithScaler) {
     auto update = fromjson("{$addToSet: {a: 1}}");
     boost::intrusive_ptr<ExpressionContextForTest> expCtx(new ExpressionContextForTest());