| /* |
| * Copyright (C) 2016 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.app; |
| |
| import org.junit.Test; |
| import org.junit.runner.RunWith; |
| |
| import android.app.ApplicationErrorReport.CrashInfo; |
| import android.support.test.filters.SmallTest; |
| import android.support.test.runner.AndroidJUnit4; |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertTrue; |
| |
| @RunWith(AndroidJUnit4.class) |
| @SmallTest |
| public class ApplicationErrorReportTest { |
| |
| @Test |
| public void testHugeStacktraceLeadsToReasonableReport() { |
| Throwable deepStackTrace = deepStackTrace(); |
| CrashInfo crashInfo = new CrashInfo(deepStackTrace); |
| |
| assertTrue("stack trace is longer than 50'000 characters", |
| crashInfo.stackTrace.length() < 50000); |
| } |
| |
| @Test |
| public void testHugeExceptionMessageLeadsToReasonableReport() { |
| StringBuilder msg = new StringBuilder(); |
| for (int i = 0; i < 1000000; i++) { |
| msg.append('x'); |
| } |
| |
| CrashInfo crashInfo = new CrashInfo(new Throwable(msg.toString())); |
| |
| assertTrue("message is longer than 50'000 characters", |
| crashInfo.exceptionMessage.length() < 50000); |
| } |
| |
| @Test |
| public void testTruncationKeepsStartAndEndIntact() { |
| StringBuilder msg = new StringBuilder("start"); |
| for (int i = 0; i < 1000000; i++) { |
| msg.append('x'); |
| } |
| msg.append("end"); |
| |
| CrashInfo crashInfo = new CrashInfo(new Throwable(msg.toString())); |
| |
| String exceptionMessage = crashInfo.exceptionMessage; |
| assertEquals("start", exceptionMessage.substring(0, "start".length())); |
| assertEquals("end", exceptionMessage.substring(exceptionMessage.length() - "end".length())); |
| } |
| |
| /** |
| * @return a Throwable with a very long stack trace. |
| */ |
| private Throwable deepStackTrace() { |
| return stackTraceGenerator__aaaaaaaaa_aaaaaaaaa_aaaaaaaaa_aaaaaaaaa_aaaaaaaaa(1000); |
| } |
| |
| private Throwable stackTraceGenerator__aaaaaaaaa_aaaaaaaaa_aaaaaaaaa_aaaaaaaaa_aaaaaaaaa( |
| int d) { |
| if (d > 0) { |
| return stackTraceGenerator__aaaaaaaaa_aaaaaaaaa_aaaaaaaaa_aaaaaaaaa_aaaaaaaaa(d - 1); |
| } else { |
| return new Throwable("here"); |
| } |
| } |
| } |