add native prop name test

Author: kamilogorek

packages/integrations/test/extraerrordata.test.ts

@@ -133,4 +133,25 @@ describe('ExtraErrorData()', () => {
       },
     });
   });
+
+  it('toJSON props should allow for usage of native names', () => {
+    const error = new TypeError('foo') as ExtendedError;
+    error.baz = 42;
+    error.toJSON = function() {
+      return {
+        message: 'bar',
+      };
+    };
+
+    const enhancedEvent = extraErrorData.enhanceEventWithErrorData(event, {
+      originalException: error,
+    });
+
+    expect(enhancedEvent.contexts).toEqual({
+      TypeError: {
+        baz: 42,
+        message: 'bar',
+      },
+    });
+  });
 });