Update gabledroofbug.test.js

Author: Beakerboy

test/gabledroofbug.test.js

@@ -186,7 +186,7 @@ beforeEach(() => {
 test('Constructor', () => {
   const bldg = new Building('868101951', data);
   expect(bldg.parts.length).toBe(0);
-  expect(bldg.outerElement.getAttribute('roof:direction')).toBe(0);
+  expect(bldg.outerElement.getAttribute('roof:direction')).toBe(undefined);
   expect(bldg.outerElement.options.roof.direction).toBe(0);
   const sideAngle = BuildingShapeUtils.longestSideAngle(bldg.outerElement.shape);
   // verify this