it("associates data series for a 1-axis graph", function () {
    expect(cf.getDataSeriesByAxis(oneAxis, "y").length).toBe(3);
    expect(cf.getDataSeriesByAxis(oneAxis, "y2").length).toBe(0);
    expect(cf.getDataSeriesByAxis(oneAxis, "fakeaxis").length).toBe(0);
  });