 expect(ripple.ripples.length).to.be.eql(0);
          MockInteractions.down(ripple);
          expect(ripple.ripples.length).to.be.eql(0);
        });

        test('ripples can be manually created', function () {
          expect(ripple.ripples.length).to.be.eql(0);
          ripple.simulatedRipple()
          expect(ripple.ripples.length).to.be.eql(1);
        });
      });

      suite('with the `center` attribute set to true', function () {
        setup(function () {
          rippleContainer = fixtur