InformationRatioCalculator { public double calculate(final double assetReturn, final double benchmarkReturn, final double assetStandardDeviation) { return (assetReturn - benchmarkReturn) / assetStandardDeviation; }  double calculate(final double assetReturn, final double benchmarkReturn, final double assetStandardDeviation);  }
@Test public void test() { final double assetReturn = 0.12; final double benchmarkReturn = 0.03; final double assetStandardDeviation = 0.15; assertEquals(new InformationRatioCalculator().calculate(assetReturn, benchmarkReturn, assetStandardDeviation), 0.6, 0); }