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September 21, 2017 07:45
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From android-perf-testing codelab
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/* | |
* 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(); | |
} | |
} | |
} | |
} |
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