1 files changed, 26 insertions, 0 deletions
diff --git a/jstests/core/write/insert/insert_illegal_doc.js b/jstests/core/write/insert/insert_illegal_doc.js
new file mode 100644
index 00000000000..f6344f1c62b
--- /dev/null
+++ b/jstests/core/write/insert/insert_illegal_doc.js
@@ -0,0 +1,26 @@
+// SERVER-12185: Do not allow insertion or update of docs which will fail the
+// "parallel indexing of arrays" test
+var coll = db.insert_illegal_doc;
+coll.drop();
+coll.createIndex({a: 1, b: 1});
+
+var res;
+// test upsert
+res = coll.update({_id: 1}, {_id: 1, a: [1, 2, 3], b: [4, 5, 6]}, true);
+assert.writeError(res);
+assert.eq(res.getWriteError().code, ErrorCodes.CannotIndexParallelArrays);
+assert.eq(0, coll.find().itcount(), "should not be a doc");
+
+// test insert
+res = coll.insert({_id: 1, a: [1, 2, 3], b: [4, 5, 6]});
+assert.writeError(res);
+assert.eq(res.getWriteError().code, ErrorCodes.CannotIndexParallelArrays);
+assert.eq(0, coll.find().itcount(), "should not be a doc");
+
+// test update
+res = coll.insert({_id: 1});
+assert.commandWorked(res, "insert failed");
+res = coll.update({_id: 1}, {$set: {a: [1, 2, 3], b: [4, 5, 6]}});
+assert.writeError(res);
+assert.eq(res.getWriteError().code, ErrorCodes.CannotIndexParallelArrays);
+assert.eq(undefined, coll.findOne().a, "update should have failed");