Android example source code file (DatabaseStressTest.java)

This example Android source code file (DatabaseStressTest.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Android by Example" ^TM.

Java - Android tags/keywords

android, androidtestcase, content, context, create, databasestresstest, exception, exists, insert, into, io, override, sqlitedatabase, string, suppress, tag, test, util, utilities, values

The DatabaseStressTest.java Android example source code

/*
 * Copyright (C) 2008 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.database;

import android.content.Context;
import android.database.sqlite.*;
import android.util.Log;

import android.test.AndroidTestCase;
import android.test.suitebuilder.annotation.Suppress;

import java.io.File;

// This test suite is too desctructive and takes too long to be included in the
// automated suite.
@Suppress
public class DatabaseStressTest extends AndroidTestCase {
    private static final String TAG = "DatabaseStressTest";    
    private static final int CURRENT_DATABASE_VERSION = 1;
    private SQLiteDatabase mDatabase;
    private File mDatabaseFile;
    
    @Override
    protected void setUp() throws Exception {
        super.setUp();
        Context c = getContext();
        
        mDatabaseFile = c.getDatabasePath("database_test.db");
        if (mDatabaseFile.exists()) {
            mDatabaseFile.delete();
        }
                
        mDatabase = c.openOrCreateDatabase("database_test.db", 0, null);            
       
        assertNotNull(mDatabase);
        mDatabase.setVersion(CURRENT_DATABASE_VERSION);
        
        mDatabase.execSQL("CREATE TABLE IF NOT EXISTS test (_id INTEGER PRIMARY KEY, data TEXT);");

    }

    @Override
    protected void tearDown() throws Exception {
        mDatabase.close();
        mDatabaseFile.delete();
        super.tearDown();
    }

    public void testSingleThreadInsertDelete() {        
        int i = 0;
        char[] ch = new char[100000];
        String str = new String(ch);
        String[] strArr = new String[1];
        strArr[0] = str;
        for (; i < 10000; ++i) {
            try {
                mDatabase.execSQL("INSERT INTO test (data) VALUES (?)", strArr);
                mDatabase.execSQL("delete from test;");
            } catch (Exception e) {
                Log.e(TAG, "exception " + e.getMessage());                
            }
        }        
    }
   
    /**
     * use fillup -p 90 before run the test
     * and when disk run out
     * start delete some fillup files
     * and see if db recover
     */
    public void testOutOfSpace() {
        int i = 0;
        char[] ch = new char[100000];
        String str = new String(ch);
        String[] strArr = new String[1];
        strArr[0] = str;
        for (; i < 10000; ++i) {
            try {
                mDatabase.execSQL("INSERT INTO test (data) VALUES (?)", strArr);
            } catch (Exception e) {
                Log.e(TAG, "exception " + e.getMessage());                
            }
        }        
    }
}