| /* |
| * Copyright (C) 2009 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 com.android.unit_tests; |
| |
| import android.app.Activity; |
| import android.content.Context; |
| import android.database.sqlite.SQLiteDatabase; |
| import android.test.suitebuilder.annotation.LargeTest; |
| import android.test.suitebuilder.annotation.Suppress; |
| import android.util.Log; |
| import java.io.File; |
| import java.util.concurrent.atomic.AtomicInteger; |
| import android.test.AndroidTestCase; |
| |
| import junit.framework.TestCase; |
| |
| /* |
| * This is a series of unit tests for database locks. |
| * |
| * Suppress these tests for now, since they have has inconsistent results. |
| * This should be turned into a performance tracking test. |
| */ |
| @Suppress |
| public class DatabaseLockTest extends AndroidTestCase { |
| |
| private static final int NUM_ITERATIONS = 100; |
| private static final int SLEEP_TIME = 30; |
| private static final int MAX_ALLOWED_LATENCY_TIME = 30; |
| private SQLiteDatabase mDatabase; |
| private File mDatabaseFile; |
| private AtomicInteger mCounter = new AtomicInteger(); |
| |
| @Override |
| protected void setUp() throws Exception { |
| super.setUp(); |
| File parentDir = getContext().getFilesDir(); |
| mDatabaseFile = new File(parentDir, "database_test.db"); |
| |
| if (mDatabaseFile.exists()) { |
| mDatabaseFile.delete(); |
| } |
| mDatabase = SQLiteDatabase.openOrCreateDatabase(mDatabaseFile.getPath(), null); |
| assertNotNull(mDatabase); |
| } |
| |
| @Override |
| protected void tearDown() throws Exception { |
| mDatabase.close(); |
| mDatabaseFile.delete(); |
| super.tearDown(); |
| } |
| |
| /* |
| * testLockFairness() tests the fairness of prioritizing multiple threads |
| * attempting to access a database concurrently. |
| * This test is intended to verify that, when two threads are accessing the |
| * same database at the same time with the same prioritization, neither thread |
| * is locked out and prevented from accessing the database. |
| */ |
| @Suppress |
| public void testLockFairness() { |
| startDatabaseFairnessThread(); |
| int previous = 0; |
| for (int i = 0; i < NUM_ITERATIONS; i++) { |
| mDatabase.beginTransaction(); |
| int val = mCounter.get(); |
| if (i == 0) { |
| previous = val - i; |
| } |
| assertTrue(previous == (val - i)); |
| try { |
| Thread.currentThread().sleep(SLEEP_TIME); |
| } catch (InterruptedException e) { |
| // ignore |
| } |
| mDatabase.endTransaction(); |
| } |
| } |
| |
| /* |
| * This function is to create the second thread for testLockFairness() test. |
| */ |
| private void startDatabaseFairnessThread() { |
| Thread thread = new DatabaseFairnessThread(); |
| thread.start(); |
| } |
| |
| private class DatabaseFairnessThread extends Thread { |
| @Override |
| public void run() { |
| for (int i = 0; i < NUM_ITERATIONS; i++) { |
| mDatabase.beginTransaction(); |
| int val = mCounter.incrementAndGet(); |
| try { |
| Thread.currentThread().sleep(SLEEP_TIME); |
| } catch (InterruptedException e) { |
| // ignore |
| } |
| mDatabase.endTransaction(); |
| } |
| } |
| } |
| |
| /* |
| * testLockLatency() tests the latency of database locks. |
| * This test is intended to verify that, even when two threads are accessing |
| * the same database, the locking/unlocking of the database is done within an |
| * appropriate amount of time (MAX_ALLOWED_LATENCY_TIME). |
| */ |
| @Suppress |
| public void testLockLatency() { |
| startDatabaseLatencyThread(); |
| int previous = 0; |
| long sumTime = 0; |
| long maxTime = 0; |
| for (int i = 0; i < NUM_ITERATIONS; i++) { |
| long startTime = System.currentTimeMillis(); |
| mDatabase.beginTransaction(); |
| long endTime = System.currentTimeMillis(); |
| long elapsedTime = endTime - startTime; |
| if (maxTime < elapsedTime) { |
| maxTime = elapsedTime; |
| } |
| sumTime += elapsedTime; |
| try { |
| Thread.currentThread().sleep(SLEEP_TIME); |
| } catch (InterruptedException e) { |
| // ignore |
| } |
| mDatabase.endTransaction(); |
| } |
| long averageTime = sumTime/NUM_ITERATIONS; |
| Log.i("DatabaseLockLatency", "AverageTime: " + averageTime); |
| Log.i("DatabaseLockLatency", "MaxTime: " + maxTime); |
| assertTrue( (averageTime - SLEEP_TIME) <= MAX_ALLOWED_LATENCY_TIME); |
| } |
| |
| /* |
| * This function is to create the second thread for testLockLatency() test. |
| */ |
| private void startDatabaseLatencyThread() { |
| Thread thread = new DatabaseLatencyThread(); |
| thread.start(); |
| } |
| |
| private class DatabaseLatencyThread extends Thread { |
| @Override |
| public void run() { |
| for (int i = 0; i < NUM_ITERATIONS; i++) |
| { |
| mDatabase.beginTransaction(); |
| try { |
| Thread.currentThread().sleep(SLEEP_TIME); |
| } catch (InterruptedException e) { |
| // ignore |
| } |
| mDatabase.endTransaction(); |
| } |
| } |
| } |
| } |