PG: Updating mixed array test (#5252)

* PG: Updating mixed array test

Currently we can save a mixed array but not update

* build array instead of casting

* fix test

* add recursion

spec/ParseQuery.spec.js

@@ -4589,4 +4589,28 @@ describe('Parse.Query testing', () => {
     const results = await query.find();
     equal(results[0].get('array'), data2);
   });
+
+  it('can update mixed array', async () => {
+    const data1 = [0, 1.1, 'hello world', { foo: 'bar' }];
+    const data2 = [0, 1, { foo: 'bar' }, [], [1, 2, 'bar']];
+    const obj1 = new TestObject();
+    obj1.set('array', data1);
+    await obj1.save();
+    equal(obj1.get('array'), data1);
+
+    const query = new Parse.Query(TestObject);
+    query.equalTo('objectId', obj1.id);
+
+    const result = await query.first();
+    equal(result.get('array'), data1);
+
+    result.set('array', data2);
+    equal(result.get('array'), data2);
+
+    await result.save();
+    equal(result.get('array'), data2);
+
+    const results = await query.find();
+    equal(results[0].get('array'), data2);
+  });
 });