/* * Copyright 2015, Google Inc. * * 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 com.google.android.perftesting.testrules; import android.os.Build; import android.os.Trace; import android.util.Log; import com.google.android.perftesting.common.PerfTestingUtils; import org.junit.rules.ExternalResource; import org.junit.runner.Description; import org.junit.runners.model.Statement; /** * This rule executes clears logcat prior to a test then records the output at the end of a test. * * <pre> * @Rule * public EnableLogcatDump mEnableLogcatDump = new EnableLogcatDump(); * </pre> */ public class EnableLogcatDump extends ExternalResource { private static final String LOG_TAG = "EnableLogcatDump"; private String mTestName; private String mTestClass; @Override public Statement apply(Statement base, Description description) { mTestName = description.getMethodName(); mTestClass = description.getClassName(); return super.apply(base, description); } /** * Clear logcat buffer prior to test run. */ public void before() throws Throwable { if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) { ProcessBuilder processBuilder = new ProcessBuilder(); processBuilder.command("logcat", "-c"); processBuilder.redirectErrorStream(); Process process = processBuilder.start(); process.waitFor(); if (process.exitValue() != 0) { Log.e(LOG_TAG, "Error while clearing logcat, exitValue=" + process.exitValue()); } } } /** * Extract logcat buffer to a file ater test run. */ public void after() { try { if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR2) { Trace.beginSection("Taking logcat"); } ProcessBuilder processBuilder = new ProcessBuilder(); processBuilder.command("logcat", "-d", "-f", PerfTestingUtils.getTestFile(mTestClass, mTestName, "logcat.log") .getAbsolutePath()); processBuilder.redirectErrorStream(); Process process = processBuilder.start(); process.waitFor(); if (process.exitValue() != 0) { Log.e(LOG_TAG, "Error exit value while extracting logcat, exitValue=" + process.exitValue()); } } catch (Exception ignored) { Log.e(LOG_TAG, "Error while extracting logcat", ignored); } finally { if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR2) { Trace.endSection(); } } } }