test(ParseCloudeTest): add case 'retrieve subclass objects'

* Test failing with error "Expected 'default' to be 'foo'."
* `jasmine.DEFAULT_TIMEOUT_INTERVAL` was increased to `10000` because the first cases often failed when starting integration testing.

Related to issue parse-community/parse-server#5521

integration/test/ParseCloudTest.js

@@ -133,4 +133,37 @@ describe('Parse Cloud', () => {
       done();
     });
   });
+
+  it('retrieve subclass objects', async (done) => {
+    try {
+
+      // Register custom class with initial value prop
+      class MySubclass extends Parse.Object {
+        constructor(attr) {
+          super('MySubclass', attr);
+          if(!attr || !attr.defaultProp) {
+            this.defaultProp = 'default';
+          }
+        }
+        // get defaultProp() { return this.get('defaultProp'); }
+        // set defaultProp(val) { this.set('defaultProp', val); }
+      }
+      Parse.Object.registerSubclass('MySubclass', MySubclass);
+
+      const o = await new MySubclass().save();
+      let results = await new Parse.Query(MySubclass).find();
+      expect(results.length).toBe(1);
+      expect(results[0].defaultProp).toBe('default');
+      await o.destroy();
+
+      await new MySubclass({defaultProp: 'foo'}).save();
+      results = await new Parse.Query(MySubclass).find();
+      expect(results.length).toBe(1);
+      expect(results[0].defaultProp).toBe('foo');
+
+      done();
+    } catch(e) {
+      done.fail(e);
+    }
+  });
 });

integration/test/helper.js

@@ -1,6 +1,6 @@
 const ParseServer = require('parse-server').ParseServer;
 
-jasmine.DEFAULT_TIMEOUT_INTERVAL = 5000;
+jasmine.DEFAULT_TIMEOUT_INTERVAL = 10000;
 beforeAll((done) => {
   const { app } = require('../server');
   const httpServer = require('http').createServer(app);