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/*
* Copyright (C) 2022 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.adservices.data;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import androidx.test.core.app.ApplicationProvider;
import com.google.common.collect.ImmutableSet;
import java.util.Set;
public final class DbTestUtil {
private static final Context sContext = ApplicationProvider.getApplicationContext();
private static final String DATABASE_NAME_FOR_TEST = "adservices_test.db";
private static DbHelper sSingleton;
/** Erases all data from the table rows */
public static void deleteTable(String tableName) {
SQLiteDatabase db = getDbHelperForTest().safeGetWritableDatabase();
if (db == null) {
return;
}
db.delete(tableName, /* whereClause = */ null, /* whereArgs = */ null);
}
/**
* Create an instance of database instance for testing.
*
* @return a test database
*/
public static DbHelper getDbHelperForTest() {
synchronized (DbHelper.class) {
if (sSingleton == null) {
sSingleton =
new DbHelper(
sContext, DATABASE_NAME_FOR_TEST, DbHelper.LATEST_DATABASE_VERSION);
}
return sSingleton;
}
}
/** Return true if table exists in the DB and column count matches. */
public static boolean doesTableExistAndColumnCountMatch(
SQLiteDatabase db, String tableName, int columnCount) {
final Set<String> tableColumns = getTableColumns(db, tableName);
return tableColumns.size() == columnCount;
}
/** Returns column names of the table. */
public static Set<String> getTableColumns(SQLiteDatabase db, String tableName) {
String query =
"select p.name from sqlite_master s "
+ "join pragma_table_info(s.name) p "
+ "where s.tbl_name = '"
+ tableName
+ "'";
Cursor cursor = db.rawQuery(query, null);
if (cursor == null) {
throw new IllegalArgumentException("Cursor is null.");
}
ImmutableSet.Builder<String> tableColumns = ImmutableSet.builder();
while (cursor.moveToNext()) {
tableColumns.add(cursor.getString(0));
}
return tableColumns.build();
}
/** Return true if the given index exists in the DB. */
public static boolean doesIndexExist(SQLiteDatabase db, String index) {
String query = "SELECT * FROM sqlite_master WHERE type='index' and name='" + index + "'";
Cursor cursor = db.rawQuery(query, null);
return cursor != null && cursor.getCount() > 0;
}
}
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