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/*
* Copyright 2022 Google LLC
*
* 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.google.android.libraries.mobiledatadownload.file.samples;
import static com.google.android.libraries.mobiledatadownload.file.common.testing.StreamUtils.createFile;
import static com.google.android.libraries.mobiledatadownload.file.common.testing.StreamUtils.readFile;
import static com.google.common.truth.Truth.assertThat;
import static java.nio.charset.StandardCharsets.UTF_8;
import android.net.Uri;
import android.text.TextUtils;
import com.google.android.libraries.mobiledatadownload.file.SynchronousFileStorage;
import com.google.android.libraries.mobiledatadownload.file.backends.FileUriAdapter;
import com.google.android.libraries.mobiledatadownload.file.backends.JavaFileBackend;
import com.google.android.libraries.mobiledatadownload.file.common.Sizable;
import com.google.android.libraries.mobiledatadownload.file.common.testing.TemporaryUri;
import com.google.android.libraries.mobiledatadownload.file.openers.ReadStreamOpener;
import com.google.android.libraries.mobiledatadownload.file.transforms.CompressTransform;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.Lists;
import com.google.common.io.BaseEncoding;
import com.google.thirdparty.robolectric.GoogleRobolectricTestRunner;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.List;
import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;
import org.junit.runner.RunWith;
@RunWith(GoogleRobolectricTestRunner.class)
public final class SamplesTest {
SynchronousFileStorage storage;
ByteCountingMonitor byteCounter;
@Rule public TemporaryUri tmpUri = new TemporaryUri();
@Before
public void setupFileStorage() {
byteCounter = new ByteCountingMonitor();
storage =
new SynchronousFileStorage(
ImmutableList.of(new JavaFileBackend(), new Base64Backend()),
ImmutableList.of(
new Base64Transform(), new CapitalizationTransform(), new CompressTransform()),
ImmutableList.of(byteCounter));
}
@Test
public void capitalizeAndBase64ShouldRoundTrip() throws Exception {
Uri uri = tmpUri.newUri().buildUpon().encodedFragment("transform=capitalize+base64").build();
createFile(storage, uri, "SOME ALL CAPS TEXT");
assertThat(readFile(storage, uri)).isEqualTo("SOME ALL CAPS TEXT");
// Check raw file and manually decoded result.
List<String> path = Lists.newArrayList(uri.getPathSegments());
String filename = path.get(path.size() - 1);
filename = filename.toLowerCase(); // capitalize
filename = BaseEncoding.base64().encode(filename.getBytes(UTF_8)); // base64
path.set(path.size() - 1, filename);
Uri encodedUri = uri.buildUpon().path(TextUtils.join("/", path)).build();
File encodedFile = FileUriAdapter.instance().toFile(encodedUri);
BufferedReader rawReader =
new BufferedReader(new InputStreamReader(new FileInputStream(encodedFile), UTF_8));
String encodedText = rawReader.readLine();
assertThat(encodedText).isEqualTo("c29tZSBhbGwgY2FwcyB0ZXh0");
String lowercaseText = new String(BaseEncoding.base64().decode(encodedText), UTF_8);
assertThat(lowercaseText).isEqualTo("some all caps text");
rawReader.close();
assertThat(byteCounter.stats())
.isEqualTo(new long[] {encodedText.length(), encodedText.length()});
}
@Test
public void capitalizeAndBase64AndCompressShouldRoundTrip() throws Exception {
Uri uri =
tmpUri.newUri().buildUpon().encodedFragment("transform=capitalize+base64+compress").build();
createFile(storage, uri, "SOME ALL CAPS TEXT");
assertThat(readFile(storage, uri)).isEqualTo("SOME ALL CAPS TEXT");
assertThat(byteCounter.stats()).isEqualTo(new long[] {32, 32});
}
@Test
public void base64BackendShouldRoundTrip() throws Exception {
Uri uri = tmpUri.newUri().buildUpon().scheme("base64").build();
createFile(storage, uri, "SOME ALL CAPS TEXT");
assertThat(readFile(storage, uri)).isEqualTo("SOME ALL CAPS TEXT");
assertThat(byteCounter.stats())
.isEqualTo(new long[] {"SOME ALL CAPS TEXT".length(), "SOME ALL CAPS TEXT".length()});
}
@Test
public void capitalizationTransform_shouldBeSizable() throws Exception {
Uri uri = tmpUri.newUri().buildUpon().encodedFragment("transform=capitalize").build();
String text = "SOME ALL CAPS TEXT";
createFile(storage, uri, text);
try (InputStream in = storage.open(uri, ReadStreamOpener.create())) {
assertThat(in instanceof Sizable).isTrue();
assertThat(((Sizable) in).size()).isEqualTo(text.length());
}
}
}
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