| /* |
| * Copyright 2018 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 androidx.room.integration.testapp.test; |
| |
| import static org.hamcrest.CoreMatchers.containsString; |
| import static org.hamcrest.CoreMatchers.equalTo; |
| import static org.hamcrest.CoreMatchers.hasItem; |
| import static org.hamcrest.CoreMatchers.is; |
| import static org.hamcrest.collection.IsCollectionWithSize.hasSize; |
| import static org.junit.Assert.assertThat; |
| import static org.junit.Assert.fail; |
| |
| import android.content.Context; |
| import android.database.Cursor; |
| import android.support.test.InstrumentationRegistry; |
| import android.support.test.filters.MediumTest; |
| import android.support.test.filters.SdkSuppress; |
| import android.support.test.filters.SmallTest; |
| import android.support.test.runner.AndroidJUnit4; |
| |
| import androidx.annotation.NonNull; |
| import androidx.room.Dao; |
| import androidx.room.Database; |
| import androidx.room.Entity; |
| import androidx.room.ForeignKey; |
| import androidx.room.Insert; |
| import androidx.room.InvalidationTracker; |
| import androidx.room.PrimaryKey; |
| import androidx.room.Query; |
| import androidx.room.Room; |
| import androidx.room.RoomDatabase; |
| |
| import org.junit.After; |
| import org.junit.Before; |
| import org.junit.Test; |
| import org.junit.runner.RunWith; |
| |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.IOException; |
| import java.nio.charset.Charset; |
| import java.util.Set; |
| import java.util.UUID; |
| import java.util.concurrent.CountDownLatch; |
| import java.util.concurrent.TimeUnit; |
| |
| @SuppressWarnings("WeakerAccess") |
| @RunWith(AndroidJUnit4.class) |
| public class ClearAllTablesTest { |
| |
| @Database(version = 1, entities = {Parent.class, Child.class}, exportSchema = false) |
| public abstract static class ClearAllTablesDatabase extends RoomDatabase { |
| abstract ClearAllTablesDao dao(); |
| } |
| |
| @Entity |
| public static class Parent { |
| @PrimaryKey |
| public long id; |
| public String name; |
| |
| public Parent(long id, String name) { |
| this.id = id; |
| this.name = name; |
| } |
| } |
| |
| @Entity(foreignKeys = { |
| @ForeignKey(entity = Parent.class, parentColumns = "id", childColumns = "parentId")}) |
| public static class Child { |
| @PrimaryKey |
| public long id; |
| public String name; |
| public long parentId; |
| |
| public Child(long id, String name, long parentId) { |
| this.id = id; |
| this.name = name; |
| this.parentId = parentId; |
| } |
| } |
| |
| @Dao |
| public interface ClearAllTablesDao { |
| @Insert |
| void insertParent(Parent parent); |
| |
| @Insert |
| void insertChild(Child child); |
| |
| @Query("SELECT COUNT(*) FROM Parent") |
| int countParent(); |
| |
| @Query("SELECT COUNT(*) FROM Child") |
| int countChild(); |
| } |
| |
| private ClearAllTablesDatabase mDatabase; |
| private ClearAllTablesDao mDao; |
| |
| @Before |
| public void setUp() { |
| final Context context = InstrumentationRegistry.getTargetContext(); |
| mDatabase = Room.inMemoryDatabaseBuilder(context, ClearAllTablesDatabase.class).build(); |
| mDao = mDatabase.dao(); |
| } |
| |
| @After |
| public void closeDatabase() { |
| mDatabase.close(); |
| } |
| |
| @Test |
| @SmallTest |
| public void simple() { |
| mDao.insertParent(new Parent(1, "A")); |
| assertThat(mDao.countParent(), is(1)); |
| mDatabase.clearAllTables(); |
| assertThat(mDao.countParent(), is(0)); |
| } |
| |
| @Test |
| @SmallTest |
| public void inTransaction() { |
| mDao.insertParent(new Parent(1, "A")); |
| assertThat(mDao.countParent(), is(1)); |
| // Running clearAllTables in a transaction is not recommended, but we should not crash. |
| mDatabase.runInTransaction(() -> mDatabase.clearAllTables()); |
| assertThat(mDao.countParent(), is(0)); |
| } |
| |
| @Test |
| @SmallTest |
| public void inMainThread() { |
| InstrumentationRegistry.getInstrumentation().runOnMainSync(() -> { |
| try { |
| mDatabase.clearAllTables(); |
| fail("Was expecting an exception"); |
| } catch (IllegalStateException e) { |
| assertThat(e.getMessage(), containsString("main thread")); |
| } |
| }); |
| } |
| |
| @Test |
| @SmallTest |
| public void foreignKey() { |
| mDao.insertParent(new Parent(1, "A")); |
| mDao.insertChild(new Child(1, "a", 1)); |
| assertThat(mDao.countParent(), is(1)); |
| assertThat(mDao.countChild(), is(1)); |
| mDatabase.clearAllTables(); |
| assertThat(mDao.countParent(), is(0)); |
| assertThat(mDao.countChild(), is(0)); |
| } |
| |
| @Test |
| @SmallTest |
| public void observer() throws InterruptedException { |
| mDao.insertParent(new Parent(1, "A")); |
| assertThat(mDao.countParent(), is(1)); |
| final CountDownLatch latch = new CountDownLatch(1); |
| mDatabase.getInvalidationTracker().addObserver(new InvalidationTracker.Observer("Parent") { |
| @Override |
| public void onInvalidated(@NonNull Set<String> tables) { |
| assertThat(tables, hasSize(1)); |
| assertThat(tables, hasItem("Parent")); |
| assertThat(mDao.countParent(), is(0)); |
| latch.countDown(); |
| } |
| }); |
| mDatabase.clearAllTables(); |
| assertThat(latch.await(3000, TimeUnit.MILLISECONDS), is(true)); |
| } |
| |
| @Test |
| @MediumTest |
| public void clearsDataFromDiskTruncate() throws IOException { |
| clearsDataFromDisk(RoomDatabase.JournalMode.TRUNCATE); |
| } |
| |
| @Test |
| @MediumTest |
| @SdkSuppress(minSdkVersion = 16) |
| public void clearsDataFromDiskWal() throws IOException { |
| clearsDataFromDisk(RoomDatabase.JournalMode.WRITE_AHEAD_LOGGING); |
| } |
| |
| private void clearsDataFromDisk(RoomDatabase.JournalMode journalMode) throws IOException { |
| final Context context = InstrumentationRegistry.getTargetContext(); |
| final String dbName = "clear.db"; |
| context.deleteDatabase(dbName); |
| ClearAllTablesDatabase db; |
| db = Room.databaseBuilder(context, ClearAllTablesDatabase.class, dbName) |
| .setJournalMode(journalMode).build(); |
| final File file = context.getDatabasePath(dbName); |
| final String uuid = UUID.randomUUID().toString(); |
| db.dao().insertParent(new Parent(1, uuid)); |
| assertThat(queryEncoding(db), is(equalTo("UTF-8"))); |
| db.close(); |
| assertThat(fileContainsString(file, uuid), is(true)); |
| db = Room.databaseBuilder(context, ClearAllTablesDatabase.class, dbName) |
| .setJournalMode(journalMode).build(); |
| db.clearAllTables(); |
| db.close(); |
| assertThat(fileContainsString(file, uuid), is(false)); |
| } |
| |
| private String queryEncoding(RoomDatabase db) { |
| Cursor c = null; |
| try { |
| c = db.query("PRAGMA encoding", null); |
| c.moveToFirst(); |
| return c.getString(0); |
| } finally { |
| if (c != null) { |
| c.close(); |
| } |
| } |
| } |
| |
| private boolean fileContainsString(File file, String s) throws IOException { |
| final byte[] content = new byte[(int) file.length()]; |
| final FileInputStream stream = new FileInputStream(file); |
| //noinspection TryFinallyCanBeTryWithResources |
| try { |
| assertThat(stream.read(content), is(content.length)); |
| return new String(content, Charset.forName("UTF-8")).indexOf(s) > 0; |
| } finally { |
| stream.close(); |
| } |
| } |
| } |