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/*
* Copyright (C) 2017 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.launcher3.model;
import static junit.framework.Assert.assertEquals;
import static junit.framework.Assert.assertFalse;
import static junit.framework.Assert.assertNotSame;
import static junit.framework.Assert.assertTrue;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.support.test.InstrumentationRegistry;
import android.support.test.filters.SmallTest;
import android.support.test.runner.AndroidJUnit4;
import com.android.launcher3.LauncherProvider;
import com.android.launcher3.LauncherProvider.DatabaseHelper;
import com.android.launcher3.LauncherSettings.Favorites;
import com.android.launcher3.R;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import java.io.File;
/**
* Tests for {@link DbDowngradeHelper}
*/
@SmallTest
@RunWith(AndroidJUnit4.class)
public class DbDowngradeHelperTest {
private static final String SCHEMA_FILE = "test_schema.json";
private static final String DB_FILE = "test.db";
private Context mContext;
private File mSchemaFile;
private File mDbFile;
@Before
public void setup() {
mContext = InstrumentationRegistry.getTargetContext();
mSchemaFile = mContext.getFileStreamPath(SCHEMA_FILE);
mDbFile = mContext.getDatabasePath(DB_FILE);
}
@Test
public void testUpdateSchemaFile() throws Exception {
Context myContext = InstrumentationRegistry.getContext();
int testResId = myContext.getResources().getIdentifier(
"db_schema_v10", "raw", myContext.getPackageName());
mSchemaFile.delete();
assertFalse(mSchemaFile.exists());
DbDowngradeHelper.updateSchemaFile(mSchemaFile, 10, myContext, testResId);
assertTrue(mSchemaFile.exists());
assertEquals(10, DbDowngradeHelper.parse(mSchemaFile).version);
// Schema is updated on version upgrade
assertTrue(mSchemaFile.setLastModified(0));
DbDowngradeHelper.updateSchemaFile(mSchemaFile, 11, myContext, testResId);
assertNotSame(0, mSchemaFile.lastModified());
// Schema is not updated when version is same
assertTrue(mSchemaFile.setLastModified(0));
DbDowngradeHelper.updateSchemaFile(mSchemaFile, 10, myContext, testResId);
assertEquals(0, mSchemaFile.lastModified());
// Schema is not updated on version downgrade
DbDowngradeHelper.updateSchemaFile(mSchemaFile, 3, myContext, testResId);
assertEquals(0, mSchemaFile.lastModified());
}
@Test
public void testDowngrade_success_v24() throws Exception {
setupTestDb();
TestOpenHelper helper = new TestOpenHelper(24);
assertEquals(24, helper.getReadableDatabase().getVersion());
helper.close();
}
@Test
public void testDowngrade_success_v22() throws Exception {
setupTestDb();
SQLiteOpenHelper helper = new TestOpenHelper(22);
assertEquals(22, helper.getWritableDatabase().getVersion());
// Check column does not exist
try (Cursor c = helper.getWritableDatabase().query(Favorites.TABLE_NAME,
null, null, null, null, null, null)) {
assertEquals(-1, c.getColumnIndex(Favorites.OPTIONS));
// Check data is present
assertEquals(10, c.getCount());
}
helper.close();
helper = new DatabaseHelper(mContext, null, DB_FILE) {
@Override
public void onOpen(SQLiteDatabase db) { }
};
assertEquals(LauncherProvider.SCHEMA_VERSION, helper.getWritableDatabase().getVersion());
try (Cursor c = helper.getWritableDatabase().query(Favorites.TABLE_NAME,
null, null, null, null, null, null)) {
// Check column exists
assertNotSame(-1, c.getColumnIndex(Favorites.OPTIONS));
// Check data is present
assertEquals(10, c.getCount());
}
helper.close();
}
@Test(expected = DowngradeFailException.class)
public void testDowngrade_fail_v20() throws Exception {
setupTestDb();
TestOpenHelper helper = new TestOpenHelper(20);
helper.getReadableDatabase().getVersion();
}
private void setupTestDb() throws Exception {
mSchemaFile.delete();
mDbFile.delete();
DbDowngradeHelper.updateSchemaFile(mSchemaFile, LauncherProvider.SCHEMA_VERSION, mContext,
R.raw.downgrade_schema);
DatabaseHelper dbHelper = new DatabaseHelper(mContext, null, DB_FILE) {
@Override
public void onOpen(SQLiteDatabase db) { }
};
// Insert dummy data
for (int i = 0; i < 10; i++) {
ContentValues values = new ContentValues();
values.put(Favorites._ID, i);
values.put(Favorites.TITLE, "title " + i);
dbHelper.getWritableDatabase().insert(Favorites.TABLE_NAME, null, values);
}
dbHelper.close();
}
private class TestOpenHelper extends SQLiteOpenHelper {
public TestOpenHelper(int version) {
super(mContext, DB_FILE, null, version);
}
@Override
public void onCreate(SQLiteDatabase sqLiteDatabase) {
throw new RuntimeException("DB should already be created");
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
throw new RuntimeException("Only downgrade supported");
}
@Override
public void onDowngrade(SQLiteDatabase db, int oldVersion, int newVersion) {
try {
DbDowngradeHelper.parse(mSchemaFile).onDowngrade(db, oldVersion, newVersion);
} catch (Exception e) {
throw new DowngradeFailException(e);
}
}
}
private static class DowngradeFailException extends RuntimeException {
public DowngradeFailException(Exception e) {
super(e);
}
}
}
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