@Test public void emptyFromQuickSelectSketch() { ArrayOfDoublesUpdatableSketch us = new ArrayOfDoublesUpdatableSketchBuilder().build(); ArrayOfDoublesCompactSketch sketch = us.compact(); Assert.assertTrue(sketch.isEmpty()); Assert.assertFalse(sketch.isEstimationMode()); Assert.assertEquals(sketch.getEstimate(), 0.0); Assert.assertEquals(sketch.getLowerBound(1), 0.0); Assert.assertEquals(sketch.getUpperBound(1), 0.0); Assert.assertEquals(sketch.getRetainedEntries(), 0); Assert.assertEquals(sketch.getThetaLong(), Long.MAX_VALUE); Assert.assertEquals(sketch.getTheta(), 1.0); Assert.assertNotNull(sketch.getValues()); Assert.assertEquals(sketch.getValues().length, 0); ArrayOfDoublesSketchIterator it = sketch.iterator(); while (it.next()) { Assert.fail("empty sketch expected"); } }
@Test public void emptyFromQuickSelectSketch() { ArrayOfDoublesUpdatableSketch us = new ArrayOfDoublesUpdatableSketchBuilder().build(WritableMemory.wrap(new byte[1000000])); ArrayOfDoublesCompactSketch sketch = us.compact(WritableMemory.wrap(new byte[1000000])); Assert.assertTrue(sketch.isEmpty()); Assert.assertFalse(sketch.isEstimationMode()); Assert.assertEquals(sketch.getEstimate(), 0.0); Assert.assertEquals(sketch.getLowerBound(1), 0.0); Assert.assertEquals(sketch.getUpperBound(1), 0.0); Assert.assertEquals(sketch.getRetainedEntries(), 0); Assert.assertEquals(sketch.getThetaLong(), Long.MAX_VALUE); Assert.assertEquals(sketch.getTheta(), 1.0); Assert.assertNotNull(sketch.getValues()); Assert.assertEquals(sketch.getValues().length, 0); ArrayOfDoublesSketchIterator it = sketch.iterator(); while (it.next()) { Assert.fail("empty sketch expected"); } }
Assert.assertEquals(result.getLowerBound(1), 5.0); Assert.assertEquals(result.getUpperBound(1), 5.0); ArrayOfDoublesSketchIterator it = result.iterator(); while (it.next()) { Assert.assertEquals(it.getValues(), new double[] {1}); Assert.assertEquals(result.getLowerBound(1), 5.0); Assert.assertEquals(result.getUpperBound(1), 5.0); it = result.iterator(); while (it.next()) { Assert.assertEquals(it.getValues(), new double[] {1});
@Test public void heapEstimationModeFullOverlapTwoValuesAndDownsizing() { int key = 0; ArrayOfDoublesUpdatableSketch sketch1 = new ArrayOfDoublesUpdatableSketchBuilder().setNumberOfValues(2).build(); for (int i = 0; i < 8192; i++) { sketch1.update(key++, new double[] {1.0, 2.0}); } key = 0; // full overlap ArrayOfDoublesUpdatableSketch sketch2 = new ArrayOfDoublesUpdatableSketchBuilder().setNumberOfValues(2).build(); for (int i = 0; i < 8192; i++) { sketch2.update(key++, new double[] {1.0, 2.0}); } ArrayOfDoublesUnion union = new ArrayOfDoublesSetOperationBuilder().setNumberOfValues(2).setNominalEntries(1024).buildUnion(); union.update(sketch1); union.update(sketch2); ArrayOfDoublesCompactSketch result = union.getResult(); Assert.assertFalse(result.isEmpty()); Assert.assertTrue(result.isEstimationMode()); Assert.assertEquals(result.getEstimate(), 8192.0, 8192 * 0.01); Assert.assertEquals(result.getRetainedEntries(), 1024); // union was downsampled ArrayOfDoublesSketchIterator it = result.iterator(); double[] expected = {2, 4}; while (it.next()) { Assert.assertEquals(it.getValues(), expected, Arrays.toString(it.getValues()) + " != " + Arrays.toString(expected)); } }
Assert.assertTrue(result.getLowerBound(1) <= result.getEstimate()); Assert.assertTrue(result.getUpperBound(1) > result.getEstimate()); ArrayOfDoublesSketchIterator it = result.iterator(); while (it.next()) { Assert.assertEquals(it.getValues(), new double[] {1}); Assert.assertTrue(result.getLowerBound(1) <= result.getEstimate()); Assert.assertTrue(result.getUpperBound(1) > result.getEstimate()); it = result.iterator(); while (it.next()) { Assert.assertEquals(it.getValues(), new double[] {1});
@Test public void exactMode() { ArrayOfDoublesUpdatableSketch sketchA = new ArrayOfDoublesUpdatableSketchBuilder().build(); sketchA.update(1, new double[] {1}); sketchA.update(2, new double[] {1}); sketchA.update(3, new double[] {1}); sketchA.update(4, new double[] {1}); sketchA.update(5, new double[] {1}); ArrayOfDoublesUpdatableSketch sketchB = new ArrayOfDoublesUpdatableSketchBuilder().build(); sketchB.update(3, new double[] {1}); sketchB.update(4, new double[] {1}); sketchB.update(5, new double[] {1}); sketchB.update(6, new double[] {1}); sketchB.update(7, new double[] {1}); ArrayOfDoublesAnotB aNotB = new ArrayOfDoublesSetOperationBuilder().buildAnotB(); aNotB.update(sketchA, sketchB); ArrayOfDoublesCompactSketch result = aNotB.getResult(); Assert.assertFalse(result.isEmpty()); Assert.assertEquals(result.getRetainedEntries(), 2); Assert.assertEquals(result.getEstimate(), 2.0); Assert.assertEquals(result.getLowerBound(1), 2.0); Assert.assertEquals(result.getUpperBound(1), 2.0); ArrayOfDoublesSketchIterator it = result.iterator(); while (it.next()) { Assert.assertEquals(it.getValues(), new double[] {1}); } }
@Test public void exactModeCustomSeed() { long seed = 1234567890; ArrayOfDoublesUpdatableSketch sketchA = new ArrayOfDoublesUpdatableSketchBuilder().setSeed(seed).build(); sketchA.update(1, new double[] {1}); sketchA.update(2, new double[] {1}); sketchA.update(3, new double[] {1}); sketchA.update(4, new double[] {1}); sketchA.update(5, new double[] {1}); ArrayOfDoublesUpdatableSketch sketchB = new ArrayOfDoublesUpdatableSketchBuilder().setSeed(seed).build(); sketchB.update(3, new double[] {1}); sketchB.update(4, new double[] {1}); sketchB.update(5, new double[] {1}); sketchB.update(6, new double[] {1}); sketchB.update(7, new double[] {1}); ArrayOfDoublesAnotB aNotB = new ArrayOfDoublesSetOperationBuilder().setSeed(seed).buildAnotB(); aNotB.update(sketchA, sketchB); ArrayOfDoublesCompactSketch result = aNotB.getResult(); Assert.assertFalse(result.isEmpty()); Assert.assertEquals(result.getRetainedEntries(), 2); Assert.assertEquals(result.getEstimate(), 2.0); Assert.assertEquals(result.getLowerBound(1), 2.0); Assert.assertEquals(result.getUpperBound(1), 2.0); ArrayOfDoublesSketchIterator it = result.iterator(); while (it.next()) { Assert.assertEquals(it.getValues(), new double[] {1}); } }