Android example source code file (DatabaseTestUtils.java)

This example Android source code file (DatabaseTestUtils.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, collect, collection, collections, cursor, database, databasetestutils, from, google, select, set, sqlitedatabase, string, util

The DatabaseTestUtils.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.test;

import com.google.android.collect.Sets;

import android.database.sqlite.SQLiteDatabase;
import android.database.Cursor;

import java.util.Set;

/**
 * A collection of utilities for writing unit tests for database code.
 * @hide pending API council approval
 */
public class DatabaseTestUtils {

    /**
     * Compares the schema of two databases and asserts that they are equal.
     * @param expectedDb the db that is known to have the correct schema
     * @param db the db whose schema should be checked
     */
    public static void assertSchemaEquals(SQLiteDatabase expectedDb, SQLiteDatabase db) {
        Set<String> expectedSchema = getSchemaSet(expectedDb);
        Set<String> schema = getSchemaSet(db);
        MoreAsserts.assertEquals(expectedSchema, schema);
    }

    private static Set<String> getSchemaSet(SQLiteDatabase db) {
        Set<String> schemaSet = Sets.newHashSet();

        Cursor entityCursor = db.rawQuery("SELECT sql FROM sqlite_master", null);
        try {
            while (entityCursor.moveToNext()) {
                String sql = entityCursor.getString(0);
                schemaSet.add(sql);
            }
        } finally {
            entityCursor.close();
        }
        return schemaSet;
    }
}