From 62480732c1fbe199f3ead728368334faf2d66217 Mon Sep 17 00:00:00 2001
From: Valeri Karpov <val@karpov.io>
Date: Sun, 1 Dec 2019 11:03:45 -0500
Subject: [PATCH] test(map): repro #8357

---
 test/types.map.test.js | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/test/types.map.test.js b/test/types.map.test.js
index df99d479a5e..aee37832760 100644
--- a/test/types.map.test.js
+++ b/test/types.map.test.js
@@ -743,4 +743,20 @@ describe('Map', function() {
     assert.ok(err.errors['myMap.foo.test'].message.indexOf('required') !== -1,
       err.errors['myMap.foo.test'].message);
   });
+
+  it('works with clone() (gh-8357)', function() {
+    const childSchema = mongoose.Schema({ name: String });
+    const schema = mongoose.Schema({
+      myMap: {
+        type: Map,
+        of: childSchema
+      }
+    });
+    const Model = db.model('gh8357', schema.clone());
+
+    const doc = new Model({ myMap: { foo: { name: 'bar' } } });
+
+    const err = doc.validateSync();
+    assert.ifError(err);
+  });
 });