1 files changed, 35 insertions, 0 deletions
diff --git a/jstests/sharding/graph_lookup.js b/jstests/sharding/graph_lookup.js
new file mode 100644
index 00000000000..421a2a4acf6
--- /dev/null
+++ b/jstests/sharding/graph_lookup.js
@@ -0,0 +1,35 @@
+// Test aggregating a sharded collection while using $graphLookup on an unsharded collection.
+(function() {
+    'use strict';
+
+    const st = new ShardingTest({shards: 2, rs: {nodes: 1}});
+
+    assert.commandWorked(st.s0.adminCommand({enablesharding: "test"}));
+    assert.commandWorked(st.s0.adminCommand({shardCollection: "test.foo", key: {_id: "hashed"}}));
+
+    let db = st.s0.getDB("test");
+
+    assert.writeOK(db.foo.insert([{}, {}, {}, {}]));
+    assert.writeOK(db.bar.insert({_id: 1, x: 1}));
+
+    const res = db.foo
+                    .aggregate([{
+                        $graphLookup: {
+                            from: "bar",
+                            startWith: {$literal: 1},
+                            connectFromField: "x",
+                            connectToField: "_id",
+                            as: "res"
+                        }
+                    }])
+                    .toArray();
+
+    assert.eq(res.length, 4);
+    res.forEach(function(c) {
+        assert.eq(c.res.length, 1);
+        assert.eq(c.res[0]._id, 1);
+        assert.eq(c.res[0].x, 1);
+    });
+
+    st.stop();
+})();