| /* |
| * Copyright 2020 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.datastore.core.handlers |
| |
| import androidx.datastore.core.SingleProcessDataStore |
| import androidx.datastore.core.TestingSerializer |
| import androidx.testutils.assertThrows |
| import com.google.common.truth.Truth.assertThat |
| import kotlinx.coroutines.async |
| import kotlinx.coroutines.coroutineScope |
| import kotlinx.coroutines.flow.first |
| import kotlinx.coroutines.test.TestCoroutineScope |
| import kotlinx.coroutines.test.runBlockingTest |
| import org.junit.Before |
| import org.junit.Rule |
| import org.junit.Test |
| import org.junit.rules.TemporaryFolder |
| import org.junit.rules.Timeout |
| import java.io.File |
| import java.io.IOException |
| import java.util.concurrent.TimeUnit |
| |
| @kotlinx.coroutines.ExperimentalCoroutinesApi |
| @kotlinx.coroutines.InternalCoroutinesApi |
| @kotlinx.coroutines.ObsoleteCoroutinesApi |
| @kotlinx.coroutines.FlowPreview |
| class ReplaceFileCorruptionHandlerTest { |
| @get:Rule |
| val tmp = TemporaryFolder() |
| |
| @get:Rule |
| val timeout = Timeout(10, TimeUnit.SECONDS) |
| |
| private lateinit var testFile: File |
| |
| @Before |
| fun setUp() { |
| testFile = tmp.newFile() |
| } |
| |
| @Test |
| fun testHandledRead() = runBlockingTest { |
| preSeedData(testFile, 1) |
| |
| val store = SingleProcessDataStore<Byte>( |
| { testFile }, |
| TestingSerializer(failReadWithCorruptionException = true), |
| corruptionHandler = ReplaceFileCorruptionHandler<Byte> { 10 }, |
| scope = TestCoroutineScope() |
| ) |
| |
| assertThat(store.data.first()).isEqualTo(10) |
| } |
| |
| @Test |
| fun testHandledWrite() = runBlockingTest { |
| preSeedData(testFile, 1) |
| |
| val store = SingleProcessDataStore<Byte>( |
| { testFile }, |
| TestingSerializer(failReadWithCorruptionException = true), |
| corruptionHandler = ReplaceFileCorruptionHandler<Byte> { 10 }, |
| scope = TestCoroutineScope() |
| ) |
| |
| assertThat(store.updateData { it.inc() }).isEqualTo(11) |
| } |
| |
| @Test |
| fun testHandlerCalledOnce() = runBlockingTest { |
| preSeedData(testFile, 1) |
| |
| val store = SingleProcessDataStore<Byte>( |
| { testFile }, |
| TestingSerializer(failReadWithCorruptionException = true), |
| corruptionHandler = ReplaceFileCorruptionHandler<Byte> { 10 }, |
| scope = TestCoroutineScope() |
| ) |
| |
| val plus1 = async { store.updateData { it.inc() } } |
| val minus2 = async { store.updateData { it.dec().dec() } } |
| |
| plus1.await() |
| minus2.await() |
| |
| assertThat(store.data.first()).isEqualTo(9) |
| } |
| |
| @Test |
| fun testFailingWritePropagates() = runBlockingTest { |
| |
| preSeedData(testFile, 1) |
| |
| val store = SingleProcessDataStore<Byte>( |
| { testFile }, |
| TestingSerializer(failReadWithCorruptionException = true, failingWrite = true), |
| corruptionHandler = ReplaceFileCorruptionHandler<Byte> { 10 }, |
| scope = TestCoroutineScope() |
| ) |
| |
| assertThrows<IOException> { store.data.first() } |
| |
| // Confirm that the error is still thrown since data was never replaced: |
| assertThrows<IOException> { store.data.first() } |
| } |
| |
| private suspend fun preSeedData(file: File, byte: Byte) { |
| coroutineScope { |
| SingleProcessDataStore( |
| { file }, |
| TestingSerializer(), |
| scope = this |
| ).updateData { byte } |
| } |
| } |
| } |