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Android example source code file (ProviderTestCase2.java)

This example Android source code file (ProviderTestCase2.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, class, content, contentprovider, database, file, illegalaccessexception, io, isolatedcontext, mockcontentresolver, mockcontext2, override, providertestcase2, renamingdelegatingcontext, resources, string, test, the

The ProviderTestCase2.java Android example source code

 * Copyright (C) 2007 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,
 * See the License for the specific language governing permissions and
 * limitations under the License.

package android.test;

import android.content.ContentProvider;
import android.content.ContentResolver;
import android.content.Context;
import android.content.res.Resources;
import android.test.mock.MockContext;
import android.test.mock.MockContentResolver;
import android.database.DatabaseUtils;

import java.io.File;

 * This TestCase class provides a framework for isolated testing of a single
 * ContentProvider.  It uses a {@link android.test.mock.MockContentResolver} to
 * access the provider, restricts the provider to an isolated area of the
 * filesystem (for safely creating & modifying databases & files), and injects
 * {@link android.test.IsolatedContext} to isolate the ContentProvider from the
 * rest of the running system.
 * <p>This environment is created automatically by {@link #setUp} and {@link
 * #tearDown}.
public abstract class ProviderTestCase2<T extends ContentProvider> extends AndroidTestCase {

    Class<T> mProviderClass;
    String mProviderAuthority;

    private IsolatedContext mProviderContext;
    private MockContentResolver mResolver;

       private class MockContext2 extends MockContext {

        public Resources getResources() {
            return getContext().getResources();

        public File getDir(String name, int mode) {
            // name the directory so the directory will be seperated from
            // one created through the regular Context
            return getContext().getDir("mockcontext2_" + name, mode);

    public ProviderTestCase2(Class<T> providerClass, String providerAuthority) {
        mProviderClass = providerClass;
        mProviderAuthority = providerAuthority;

     * The content provider that will be set up for use in each test method.
    private T mProvider;

    public T getProvider() {
        return mProvider;

    protected void setUp() throws Exception {

        mResolver = new MockContentResolver();
        final String filenamePrefix = "test.";
        RenamingDelegatingContext targetContextWrapper = new RenamingDelegatingContext(
                new MockContext2(), // The context that most methods are delegated to
                getContext(), // The context that file methods are delegated to
        mProviderContext = new IsolatedContext(mResolver, targetContextWrapper);

        mProvider = mProviderClass.newInstance();
        mProvider.attachInfo(mProviderContext, null);
        mResolver.addProvider(mProviderAuthority, getProvider());

    public MockContentResolver getMockContentResolver() {
        return mResolver;

    public IsolatedContext getMockContext() {
        return mProviderContext;

    public static <T extends ContentProvider> ContentResolver newResolverWithContentProviderFromSql(
            Context targetContext, String filenamePrefix, Class<T> providerClass, String authority,
            String databaseName, int databaseVersion, String sql)
            throws IllegalAccessException, InstantiationException {
        MockContentResolver resolver = new MockContentResolver();
        RenamingDelegatingContext targetContextWrapper = new RenamingDelegatingContext(
                new MockContext(), // The context that most methods are delegated to
                targetContext, // The context that file methods are delegated to
        Context context = new IsolatedContext(resolver, targetContextWrapper);
        DatabaseUtils.createDbFromSqlStatements(context, databaseName, databaseVersion, sql);

        T provider = providerClass.newInstance();
        provider.attachInfo(context, null);
        resolver.addProvider(authority, provider);

        return resolver;

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