Update buildingpart.test.js

Author: Beakerboy

test/buildingpart.test.js

@@ -69,6 +69,7 @@ test('Constructor', () => {
 
 test('Normalize Length', () => {
   expect(BuildingPart.normalizeLength('5km')).toBe(5000);
+  expect(BuildingPart.normalizeLength('1mi')).toBe(1609.344);
 });
 
 window.printError = printError;