add context to Parse.Object.save (#6626)

* added failing test

* added parsing of context in REST save request

* undo lint changes

spec/CloudCode.spec.js

@@ -2911,4 +2911,17 @@ describe('afterLogin hook', () => {
     await Parse.User.logIn('testuser', 'p@ssword');
     done();
   });
+
+  it('should have access to context as save argument', async () => {
+    // Declare triggers
+    Parse.Cloud.beforeSave('TestObject', (req) => {
+      expect(req.context.a).toEqual('a');
+    });
+    Parse.Cloud.afterSave('TestObject', (req) => {
+      expect(req.context.a).toEqual('a');
+    });
+    // Save object
+    const obj = new TestObject();
+    await obj.save(null, { context: { a: 'a' } });
+  });
 });

src/RestWrite.js

@@ -53,6 +53,11 @@ function RestWrite(
   }
 
   if (!query) {
+    // Parse context
+    if (data._context && data._context instanceof Object) {
+      this.context = data._context;
+      delete data._context;
+    }
     if (this.config.allowCustomObjectId) {
       if (
         Object.prototype.hasOwnProperty.call(data, 'objectId') &&