@Test public void testReturnsWithZeroesInSeries() { final int n = 20; final LocalDate[] times = new LocalDate[n]; final double[] data = new double[n]; final double[] returns = new double[n - 3]; double random; for (int i = 0; i < n - 2; i++) { times[i] = LocalDate.ofEpochDay(i); random = RANDOM.nextDouble(); data[i] = random; if (i > 0) { returns[i - 1] = Math.log(random / data[i - 1]); } } times[n - 2] = LocalDate.ofEpochDay(n - 2); data[n - 2] = 0; times[n - 1] = LocalDate.ofEpochDay(n - 1); data[n - 1] = RANDOM.nextDouble(); final LocalDateDoubleTimeSeries priceTS = ImmutableLocalDateDoubleTimeSeries.of(times, data); final LocalDateDoubleTimeSeries returnTS = ImmutableLocalDateDoubleTimeSeries.of(Arrays.copyOfRange(times, 1, n - 2), returns); final TimeSeriesReturnCalculator strict = new ContinuouslyCompoundedTimeSeriesReturnCalculator(CalculationMode.STRICT); final LocalDateDoubleTimeSeries[] tsArray = new LocalDateDoubleTimeSeries[] {priceTS}; try { strict.evaluate(tsArray); Assert.fail(); } catch (final TimeSeriesException e) { // Expected } final TimeSeriesReturnCalculator lenient = new ContinuouslyCompoundedTimeSeriesReturnCalculator(CalculationMode.LENIENT); assertTrue(lenient.evaluate(tsArray).equals(returnTS)); }
@SuppressWarnings("unchecked") @Test public void testReturnsWithZeroesInSeries() { final int n = 20; final long[] times = new long[n]; final double[] data = new double[n]; final double[] returns = new double[n - 3]; double random; for (int i = 0; i < n - 2; i++) { times[i] = i; random = RANDOM.nextDouble(); data[i] = random; if (i > 0) { returns[i - 1] = Math.log(random / data[i - 1]); } } times[n - 2] = n - 2; data[n - 2] = 0; times[n - 1] = n - 1; data[n - 1] = RANDOM.nextDouble(); final DoubleTimeSeries<Long> priceTS = new FastArrayLongDoubleTimeSeries(ENCODING, times, data); final DoubleTimeSeries<Long> returnTS = new FastArrayLongDoubleTimeSeries(ENCODING, Arrays.copyOfRange(times, 1, n - 2), returns); final TimeSeriesReturnCalculator strict = new ContinuouslyCompoundedTimeSeriesReturnCalculator(CalculationMode.STRICT); final DoubleTimeSeries<Long>[] tsArray = new DoubleTimeSeries[] {priceTS}; try { strict.evaluate(tsArray); Assert.fail(); } catch (final TimeSeriesException e) { // Expected } final TimeSeriesReturnCalculator lenient = new ContinuouslyCompoundedTimeSeriesReturnCalculator(CalculationMode.LENIENT); assertTrue(lenient.evaluate(tsArray).equals(returnTS)); }