Merge "Remove unused android.test.DatabaseTestUtils"

/*

 * 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 android.database.sqlite.SQLiteDatabase;

import android.database.Cursor;

import java.util.HashSet;

import java.util.Set;

/**

 * A collection of utilities for writing unit tests for database code.

 * @hide pending API council approval

 */

@Deprecated

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 = new HashSet<>();

        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;

    }

}