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/*
* Copyright (C) 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 com.android.textclassifier.downloader;
import static com.google.common.truth.Truth.assertThat;
import static org.mockito.ArgumentMatchers.any;
import static org.mockito.Mockito.when;
import static org.testng.Assert.expectThrows;
import androidx.test.core.app.ApplicationProvider;
import com.google.android.downloader.DownloadConstraints;
import com.google.android.downloader.DownloadDestination;
import com.google.android.downloader.DownloadRequest;
import com.google.android.downloader.DownloadResult;
import com.google.android.downloader.Downloader;
import com.google.android.downloader.ErrorDetails;
import com.google.android.downloader.RequestException;
import com.google.android.downloader.SimpleFileDownloadDestination;
import com.google.common.util.concurrent.FluentFuture;
import com.google.common.util.concurrent.Futures;
import com.google.common.util.concurrent.ListenableFuture;
import com.google.common.util.concurrent.MoreExecutors;
import com.google.common.util.concurrent.SettableFuture;
import java.io.File;
import java.net.URI;
import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
import org.mockito.Mock;
import org.mockito.junit.MockitoJUnit;
import org.mockito.junit.MockitoRule;
@RunWith(JUnit4.class)
public final class ModelDownloaderServiceImplTest {
@Rule public final MockitoRule mocks = MockitoJUnit.rule();
private static final long BYTES_WRITTEN = 1L;
private static final String DOWNLOAD_URI =
"https://www.gstatic.com/android/text_classifier/r/v999/en.fb";
private static final int DOWNLOADER_LIB_ERROR_CODE = 500;
private static final String ERROR_MESSAGE = "err_msg";
private static final Exception DOWNLOADER_LIB_EXCEPTION =
new RequestException(
ErrorDetails.builder()
.setErrorMessage(ERROR_MESSAGE)
.setHttpStatusCode(DOWNLOADER_LIB_ERROR_CODE)
.build());
@Mock private Downloader downloader;
private File targetModelFile;
private File targetMetadataFile;
private ModelDownloaderServiceImpl modelDownloaderServiceImpl;
private TestSuccessCallbackImpl successCallback;
private TestFailureCallbackImpl failureCallback;
@Before
public void setUp() {
this.targetModelFile =
new File(ApplicationProvider.getApplicationContext().getCacheDir(), "model.fb");
this.targetMetadataFile = ModelDownloaderServiceImpl.getMetadataFile(targetModelFile);
this.modelDownloaderServiceImpl =
new ModelDownloaderServiceImpl(MoreExecutors.newDirectExecutorService(), downloader);
this.successCallback = new TestSuccessCallbackImpl();
this.failureCallback = new TestFailureCallbackImpl();
targetModelFile.deleteOnExit();
targetMetadataFile.deleteOnExit();
when(downloader.newRequestBuilder(any(), any(DownloadDestination.class)))
.thenReturn(
DownloadRequest.newBuilder()
.setUri(URI.create(DOWNLOAD_URI))
.setDownloadConstraints(DownloadConstraints.NONE)
.setDestination(
new SimpleFileDownloadDestination(targetModelFile, targetMetadataFile)));
}
@Test
public void download_succeeded() throws Exception {
targetModelFile.createNewFile();
targetMetadataFile.createNewFile();
when(downloader.execute(any()))
.thenReturn(
FluentFuture.from(Futures.immediateFuture(DownloadResult.create(BYTES_WRITTEN))));
modelDownloaderServiceImpl.download(
DOWNLOAD_URI, targetModelFile.getAbsolutePath(), successCallback);
assertThat(successCallback.getBytesWrittenFuture().get()).isEqualTo(BYTES_WRITTEN);
assertThat(targetModelFile.exists()).isTrue();
assertThat(targetMetadataFile.exists()).isFalse();
}
@Test
public void download_failed() throws Exception {
targetModelFile.createNewFile();
targetMetadataFile.createNewFile();
when(downloader.execute(any()))
.thenReturn(FluentFuture.from(Futures.immediateFailedFuture(DOWNLOADER_LIB_EXCEPTION)));
modelDownloaderServiceImpl.download(
DOWNLOAD_URI, targetModelFile.getAbsolutePath(), successCallback);
Throwable t =
expectThrows(Throwable.class, () -> successCallback.getBytesWrittenFuture().get());
assertThat(t).hasCauseThat().isInstanceOf(ModelDownloadException.class);
ModelDownloadException e = (ModelDownloadException) t.getCause();
assertThat(e.getErrorCode()).isEqualTo(ModelDownloadException.FAILED_TO_DOWNLOAD_OTHER);
assertThat(e.getDownloaderLibErrorCode()).isEqualTo(DOWNLOADER_LIB_ERROR_CODE);
assertThat(e).hasMessageThat().contains(ERROR_MESSAGE);
assertThat(targetModelFile.exists()).isFalse();
assertThat(targetMetadataFile.exists()).isFalse();
}
@Test
public void download_succeeded_callbackFailed() throws Exception {
targetModelFile.createNewFile();
targetMetadataFile.createNewFile();
when(downloader.execute(any()))
.thenReturn(
FluentFuture.from(Futures.immediateFuture(DownloadResult.create(BYTES_WRITTEN))));
modelDownloaderServiceImpl.download(
DOWNLOAD_URI, targetModelFile.getAbsolutePath(), failureCallback);
assertThat(failureCallback.onSuccessCalled).isTrue();
assertThat(targetModelFile.exists()).isTrue();
assertThat(targetMetadataFile.exists()).isFalse();
}
@Test
public void download_failed_callbackFailed() throws Exception {
targetModelFile.createNewFile();
targetMetadataFile.createNewFile();
when(downloader.execute(any()))
.thenReturn(FluentFuture.from(Futures.immediateFailedFuture(DOWNLOADER_LIB_EXCEPTION)));
modelDownloaderServiceImpl.download(
DOWNLOAD_URI, targetModelFile.getAbsolutePath(), failureCallback);
assertThat(failureCallback.onFailureCalled).isTrue();
assertThat(targetModelFile.exists()).isFalse();
assertThat(targetMetadataFile.exists()).isFalse();
}
// NOTICE: Had some problem mocking this AIDL interface, so created fake impls
private static final class TestSuccessCallbackImpl extends IModelDownloaderCallback.Stub {
private final SettableFuture<Long> bytesWrittenFuture = SettableFuture.<Long>create();
public ListenableFuture<Long> getBytesWrittenFuture() {
return bytesWrittenFuture;
}
@Override
public void onSuccess(long bytesWritten) {
bytesWrittenFuture.set(bytesWritten);
}
@Override
public void onFailure(int downloaderLibErrorCode, String errorMsg) {
bytesWrittenFuture.setException(
new ModelDownloadException(
ModelDownloadException.FAILED_TO_DOWNLOAD_OTHER, downloaderLibErrorCode, errorMsg));
}
}
private static final class TestFailureCallbackImpl extends IModelDownloaderCallback.Stub {
public boolean onSuccessCalled = false;
public boolean onFailureCalled = false;
@Override
public void onSuccess(long bytesWritten) {
onSuccessCalled = true;
throw new RuntimeException();
}
@Override
public void onFailure(int downloaderLibErrorCode, String errorMsg) {
onFailureCalled = true;
throw new RuntimeException();
}
}
}
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