| /* |
| * 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.sensorverification; |
| |
| import junit.framework.TestCase; |
| |
| import android.hardware.cts.helpers.SensorStats; |
| import android.hardware.cts.helpers.TestSensorEnvironment; |
| import android.hardware.cts.helpers.TestSensorEvent; |
| |
| import java.util.ArrayList; |
| import java.util.Collection; |
| |
| /** |
| * Tests for {@link StandardDeviationVerification}. |
| */ |
| public class StandardDeviationVerificationTest extends TestCase { |
| |
| /** |
| * Test {@link StandardDeviationVerification#verify(TestSensorEnvironment, SensorStats)}. |
| */ |
| public void testVerify() { |
| // Stddev should be {sqrt(2.5), sqrt(2.5), sqrt(2.5)} |
| float[][] values = { |
| {0, 1, 0}, |
| {1, 2, 2}, |
| {2, 3, 4}, |
| {3, 4, 6}, |
| {4, 5, 8}, |
| }; |
| float[] standardDeviations = { |
| (float) Math.sqrt(2.5), (float) Math.sqrt(2.5), (float) Math.sqrt(10.0) |
| }; |
| |
| float[] threshold = {2, 2, 4}; |
| runVerification(threshold, values, true, standardDeviations); |
| |
| threshold = new float[]{1, 2, 4}; |
| runVerification(threshold, values, false, standardDeviations); |
| |
| threshold = new float[]{2, 1, 4}; |
| runVerification(threshold, values, false, standardDeviations); |
| |
| threshold = new float[]{2, 2, 3}; |
| runVerification(threshold, values, false, standardDeviations); |
| } |
| |
| private void runVerification(float[] threshold, float[][] values, boolean pass, |
| float[] standardDeviations) { |
| SensorStats stats = new SensorStats(); |
| StandardDeviationVerification verification = getVerification(threshold, values); |
| if (pass) { |
| verification.verify(stats); |
| } else { |
| boolean failed = false; |
| try { |
| verification.verify(stats); |
| } catch (AssertionError e) { |
| // Expected; |
| failed = true; |
| } |
| assertTrue("Expected an AssertionError", failed); |
| } |
| assertEquals(pass, stats.getValue(StandardDeviationVerification.PASSED_KEY)); |
| float[] actual = (float[]) stats.getValue(SensorStats.STANDARD_DEVIATION_KEY); |
| for (int i = 0; i < standardDeviations.length; i++) { |
| assertEquals(standardDeviations[i], actual[i], 0.1); |
| } |
| } |
| |
| private static StandardDeviationVerification getVerification( |
| float[] threshold, |
| float[] ... values) { |
| Collection<TestSensorEvent> events = new ArrayList<>(values.length); |
| for (float[] value : values) { |
| events.add(new TestSensorEvent(null, 0, 0, value)); |
| } |
| StandardDeviationVerification verification = new StandardDeviationVerification(threshold); |
| verification.addSensorEvents(events); |
| return verification; |
| } |
| } |