| /* |
| * Copyright (C) 2014 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package android.hardware.cts.helpers; |
| |
| import junit.framework.TestCase; |
| |
| import java.util.Arrays; |
| import java.util.Collection; |
| import java.util.HashSet; |
| import java.util.List; |
| import java.util.concurrent.TimeUnit; |
| |
| /** |
| * Unit tests for the {@link SensorCtsHelper} class. |
| */ |
| public class SensorCtsHelperTest extends TestCase { |
| |
| /** |
| * Test {@link SensorCtsHelper#get95PercentileValue(Collection)}. |
| */ |
| public void testGet95PercentileValue() { |
| Collection<Integer> values = new HashSet<Integer>(); |
| for (int i = 0; i < 100; i++) { |
| values.add(i); |
| } |
| assertEquals(95, (int) SensorCtsHelper.get95PercentileValue(values)); |
| |
| values = new HashSet<Integer>(); |
| for (int i = 0; i < 1000; i++) { |
| values.add(i); |
| } |
| assertEquals(950, (int) SensorCtsHelper.get95PercentileValue(values)); |
| |
| values = new HashSet<Integer>(); |
| for (int i = 0; i < 100; i++) { |
| values.add(i * i); |
| } |
| assertEquals(95 * 95, (int) SensorCtsHelper.get95PercentileValue(values)); |
| } |
| |
| /** |
| * Test {@link SensorCtsHelper#getMeans(TestSensorEvent[])}. |
| */ |
| public void testGetMeans() { |
| long[] timestamps = {0, 1, 2, 3, 4}; |
| |
| float[] values = {0, 1, 2, 3, 4}; // 2.0 |
| double[] means = SensorCtsHelper.getMeans(getSensorEvents(timestamps, values)); |
| assertEquals(1, means.length); |
| assertEquals(2.0, means[0], 0.00001); |
| |
| float[] values1 = {0, 1, 2, 3, 4}; // 2.0 |
| float[] values2 = {1, 2, 3, 4, 5}; // 3.0 |
| float[] values3 = {0, 1, 4, 9, 16}; // 6.0 |
| means = SensorCtsHelper.getMeans( |
| getSensorEvents(timestamps, values1, values2, values3)); |
| assertEquals(3, means.length); |
| assertEquals(2.0, means[0], 0.00001); |
| assertEquals(3.0, means[1], 0.00001); |
| assertEquals(6.0, means[2], 0.00001); |
| } |
| |
| /** |
| * Test {@link SensorCtsHelper#getVariances(TestSensorEvent[])}. |
| */ |
| public void testGetVariences() { |
| long[] timestamps = {0, 1, 2, 3, 4}; |
| |
| float[] values = {0, 1, 2, 3, 4}; // 2.0 |
| double[] variances = SensorCtsHelper.getVariances(getSensorEvents(timestamps, values)); |
| assertEquals(1, variances.length); |
| assertEquals(2.0, variances[0], 0.00001); |
| |
| float[] values1 = {0, 1, 2, 3, 4}; // 2.0 |
| float[] values2 = {1, 2, 3, 4, 5}; // 2.0 |
| float[] values3 = {0, 2, 4, 6, 8}; // 8.0 |
| variances = SensorCtsHelper.getVariances( |
| getSensorEvents(timestamps, values1, values2, values3)); |
| assertEquals(3, variances.length); |
| assertEquals(2.0, variances[0], 0.00001); |
| assertEquals(2.0, variances[1], 0.00001); |
| assertEquals(8.0, variances[2], 0.00001); |
| } |
| |
| /** |
| * Test {@link SensorCtsHelper#getStandardDeviations(TestSensorEvent[])}. |
| */ |
| public void testGetStandardDeviations() { |
| long[] timestamps = {0, 1, 2, 3, 4}; |
| |
| float[] values = {0, 1, 2, 3, 4}; // sqrt(2.0) |
| double[] stddev = SensorCtsHelper.getStandardDeviations( |
| getSensorEvents(timestamps, values)); |
| assertEquals(1, stddev.length); |
| assertEquals(Math.sqrt(2.0), stddev[0], 0.00001); |
| |
| float[] values1 = {0, 1, 2, 3, 4}; // sqrt(2.0) |
| float[] values2 = {1, 2, 3, 4, 5}; // sqrt(2.0) |
| float[] values3 = {0, 2, 4, 6, 8}; // sqrt(8.0) |
| stddev = SensorCtsHelper.getStandardDeviations( |
| getSensorEvents(timestamps, values1, values2, values3)); |
| assertEquals(3, stddev.length); |
| assertEquals(Math.sqrt(2.0), stddev[0], 0.00001); |
| assertEquals(Math.sqrt(2.0), stddev[1], 0.00001); |
| assertEquals(Math.sqrt(8.0), stddev[2], 0.00001); |
| } |
| |
| /** |
| * Test {@link SensorCtsHelper#getMean(Collection)}. |
| */ |
| public void testGetMean() { |
| List<Integer> values = Arrays.asList(0, 1, 2, 3, 4); |
| double mean = SensorCtsHelper.getMean(values); |
| assertEquals(2.0, mean, 0.00001); |
| |
| values = Arrays.asList(1, 2, 3, 4, 5); |
| mean = SensorCtsHelper.getMean(values); |
| assertEquals(3.0, mean, 0.00001); |
| |
| values = Arrays.asList(0, 1, 4, 9, 16); |
| mean = SensorCtsHelper.getMean(values); |
| assertEquals(6.0, mean, 0.00001); |
| } |
| |
| /** |
| * Test {@link SensorCtsHelper#getVariance(Collection)}. |
| */ |
| public void testGetVariance() { |
| List<Integer> values = Arrays.asList(0, 1, 2, 3, 4); |
| double variance = SensorCtsHelper.getVariance(values); |
| assertEquals(2.0, variance, 0.00001); |
| |
| values = Arrays.asList(1, 2, 3, 4, 5); |
| variance = SensorCtsHelper.getVariance(values); |
| assertEquals(2.0, variance, 0.00001); |
| |
| values = Arrays.asList(0, 2, 4, 6, 8); |
| variance = SensorCtsHelper.getVariance(values); |
| assertEquals(8.0, variance, 0.00001); |
| } |
| |
| /** |
| * Test {@link SensorCtsHelper#getStandardDeviation(Collection)}. |
| */ |
| public void testGetStandardDeviation() { |
| List<Integer> values = Arrays.asList(0, 1, 2, 3, 4); |
| double stddev = SensorCtsHelper.getStandardDeviation(values); |
| assertEquals(Math.sqrt(2.0), stddev, 0.00001); |
| |
| values = Arrays.asList(1, 2, 3, 4, 5); |
| stddev = SensorCtsHelper.getStandardDeviation(values); |
| assertEquals(Math.sqrt(2.0), stddev, 0.00001); |
| |
| values = Arrays.asList(0, 2, 4, 6, 8); |
| stddev = SensorCtsHelper.getStandardDeviation(values); |
| assertEquals(Math.sqrt(8.0), stddev, 0.00001); |
| } |
| |
| /** |
| * Test {@link SensorCtsHelper#getTimestampDelayValues(TestSensorEvent[])}. |
| */ |
| public void testGetTimestampDelayValues() { |
| float[] values = {0, 1, 2, 3, 4}; |
| |
| long[] timestamps = {0, 0, 1, 3, 100}; |
| List<Long> timestampDelayValues = SensorCtsHelper.getTimestampDelayValues( |
| getSensorEvents(timestamps, values)); |
| assertEquals(4, timestampDelayValues.size()); |
| assertEquals(0, (long) timestampDelayValues.get(0)); |
| assertEquals(1, (long) timestampDelayValues.get(1)); |
| assertEquals(2, (long) timestampDelayValues.get(2)); |
| assertEquals(97, (long) timestampDelayValues.get(3)); |
| } |
| |
| /** |
| * Test {@link SensorCtsHelper#getFrequency(Number, TimeUnit)}. |
| */ |
| public void testGetFrequency() { |
| assertEquals(1.0, SensorCtsHelper.getFrequency(1, TimeUnit.SECONDS), 0.001); |
| assertEquals(10.0, SensorCtsHelper.getFrequency(0.1, TimeUnit.SECONDS), 0.001); |
| assertEquals(10.0, SensorCtsHelper.getFrequency(100, TimeUnit.MILLISECONDS), 0.001); |
| assertEquals(1000.0, SensorCtsHelper.getFrequency(1, TimeUnit.MILLISECONDS), 0.001); |
| assertEquals(10000.0, SensorCtsHelper.getFrequency(0.1, TimeUnit.MILLISECONDS), 0.001); |
| assertEquals(10000.0, SensorCtsHelper.getFrequency(100, TimeUnit.MICROSECONDS), 0.001); |
| assertEquals(1000000.0, SensorCtsHelper.getFrequency(1, TimeUnit.MICROSECONDS), 0.001); |
| assertEquals(10000000.0, SensorCtsHelper.getFrequency(0.1, TimeUnit.MICROSECONDS), 0.001); |
| assertEquals(10000000.0, SensorCtsHelper.getFrequency(100, TimeUnit.NANOSECONDS), 0.001); |
| assertEquals(1000000000.0, SensorCtsHelper.getFrequency(1, TimeUnit.NANOSECONDS), 0.001); |
| } |
| |
| /** |
| * Test {@link SensorCtsHelper#getPeriod(Number, TimeUnit)}. |
| */ |
| public void testGetPeriod() { |
| assertEquals(1.0, SensorCtsHelper.getPeriod(1, TimeUnit.SECONDS), 0.001); |
| assertEquals(0.1, SensorCtsHelper.getPeriod(10, TimeUnit.SECONDS), 0.001); |
| assertEquals(100, SensorCtsHelper.getPeriod(10, TimeUnit.MILLISECONDS), 0.001); |
| assertEquals(1, SensorCtsHelper.getPeriod(1000, TimeUnit.MILLISECONDS), 0.001); |
| assertEquals(0.1, SensorCtsHelper.getPeriod(10000, TimeUnit.MILLISECONDS), 0.001); |
| assertEquals(100, SensorCtsHelper.getPeriod(10000, TimeUnit.MICROSECONDS), 0.001); |
| assertEquals(1, SensorCtsHelper.getPeriod(1000000, TimeUnit.MICROSECONDS), 0.001); |
| assertEquals(0.1, SensorCtsHelper.getPeriod(10000000, TimeUnit.MICROSECONDS), 0.001); |
| assertEquals(100, SensorCtsHelper.getPeriod(10000000, TimeUnit.NANOSECONDS), 0.001); |
| assertEquals(1, SensorCtsHelper.getPeriod(1000000000, TimeUnit.NANOSECONDS), 0.001); |
| } |
| |
| /** |
| * Test {@link SensorCtsHelper#getJitterValues(TestSensorEvent[])}. |
| */ |
| public void testGetJitterValues() { |
| float[] values = {0, 1, 2, 3, 4}; |
| |
| long[] timestamps1 = {0, 1, 2, 3, 4}; |
| List<Double> jitterValues = SensorCtsHelper.getJitterValues( |
| getSensorEvents(timestamps1, values)); |
| assertEquals(4, jitterValues.size()); |
| assertEquals(0.0, (double) jitterValues.get(0)); |
| assertEquals(0.0, (double) jitterValues.get(1)); |
| assertEquals(0.0, (double) jitterValues.get(2)); |
| assertEquals(0.0, (double) jitterValues.get(3)); |
| |
| long[] timestamps2 = {0, 0, 2, 4, 4}; |
| jitterValues = SensorCtsHelper.getJitterValues( |
| getSensorEvents(timestamps2, values)); |
| assertEquals(4, jitterValues.size()); |
| assertEquals(1.0, (double) jitterValues.get(0)); |
| assertEquals(1.0, (double) jitterValues.get(1)); |
| assertEquals(1.0, (double) jitterValues.get(2)); |
| assertEquals(1.0, (double) jitterValues.get(3)); |
| |
| long[] timestamps3 = {0, 1, 4, 9, 16}; |
| jitterValues = SensorCtsHelper.getJitterValues( |
| getSensorEvents(timestamps3, values)); |
| assertEquals(4, jitterValues.size()); |
| assertEquals(3.0, (double) jitterValues.get(0)); |
| assertEquals(1.0, (double) jitterValues.get(1)); |
| assertEquals(1.0, (double) jitterValues.get(2)); |
| assertEquals(3.0, (double) jitterValues.get(3)); |
| } |
| |
| private TestSensorEvent[] getSensorEvents(long[] timestamps, float[] ... values) { |
| TestSensorEvent[] events = new TestSensorEvent[timestamps.length]; |
| for (int i = 0; i < timestamps.length; i++) { |
| float[] eventValues = new float[values.length]; |
| for (int j = 0; j < values.length; j++) { |
| eventValues[j] = values[j][i]; |
| } |
| events[i] = new TestSensorEvent(null, timestamps[i], 0, eventValues); |
| } |
| return events; |
| } |
| } |