message: Added test to demonstrate that bundler() method returns different bundlers.
diff: @@ -78,6 +78,12 @@ suite('PolymerProject', () => {
  assert.isTrue(getFlowingState(dependencyStream));
  });
  + test('the bundler method returns a different bundler each time', () => {
  + const bundlerA = defaultProject.bundler();
  + const bundlerB = defaultProject.bundler();
  + assert.notEqual(bundlerA, bundlerB);
  + });
  +
  suite('.dependencies()', () => {
  test('reads dependencies', (done) => {
  