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/*
* Copyright (C) 2018 Square, Inc.
*
* 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 okio.samples;
import java.nio.channels.FileChannel;
import java.nio.channels.ReadableByteChannel;
import java.nio.file.Files;
import java.nio.file.StandardOpenOption;
import java.util.EnumSet;
import java.util.Set;
import okio.Buffer;
import okio.BufferedSource;
import okio.Okio;
import okio.Sink;
import okio.Source;
import okio.Timeout;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.TemporaryFolder;
import static java.nio.file.StandardOpenOption.APPEND;
import static java.nio.file.StandardOpenOption.READ;
import static java.nio.file.StandardOpenOption.WRITE;
import static org.assertj.core.api.Assertions.assertThat;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
public final class ChannelsTest {
private static final String quote =
"John, the kind of control you're attempting simply is... it's not "
+ "possible. If there is one thing the history of evolution has "
+ "taught us it's that life will not be contained. Life breaks "
+ "free, it expands to new territories and crashes through "
+ "barriers, painfully, maybe even dangerously, but, uh... well, "
+ "there it is.";
private static final Set<StandardOpenOption> r = EnumSet.of(READ);
private static final Set<StandardOpenOption> w = EnumSet.of(WRITE);
private static final Set<StandardOpenOption> append = EnumSet.of(WRITE, APPEND);
@Rule public TemporaryFolder temporaryFolder = new TemporaryFolder();
@Test public void testReadChannel() throws Exception {
ReadableByteChannel channel = new Buffer().writeUtf8(quote);
Buffer buffer = new Buffer();
Source source = new ByteChannelSource(channel, Timeout.NONE);
source.read(buffer, 75);
assertThat(buffer.readUtf8())
.isEqualTo("John, the kind of control you're attempting simply is... it's not possible.");
}
@Test public void testReadChannelFully() throws Exception {
ReadableByteChannel channel = new Buffer().writeUtf8(quote);
BufferedSource source = Okio.buffer(new ByteChannelSource(channel, Timeout.NONE));
assertThat(source.readUtf8())
.isEqualTo(quote);
}
@Test public void testWriteChannel() throws Exception {
Buffer channel = new Buffer();
Sink sink = new ByteChannelSink(channel, Timeout.NONE);
sink.write(new Buffer().writeUtf8(quote), 75);
assertThat(channel.readUtf8())
.isEqualTo("John, the kind of control you're attempting simply is... it's not possible.");
}
@Test public void testReadWriteFile() throws Exception {
java.nio.file.Path path = temporaryFolder.newFile().toPath();
Sink sink = new FileChannelSink(FileChannel.open(path, w), Timeout.NONE);
sink.write(new Buffer().writeUtf8(quote), 317);
sink.close();
assertTrue(Files.exists(path));
assertEquals(quote.length(), Files.size(path));
Buffer buffer = new Buffer();
Source source = new FileChannelSource(FileChannel.open(path, r), Timeout.NONE);
source.read(buffer, 44);
assertThat(buffer.readUtf8())
.isEqualTo("John, the kind of control you're attempting ");
source.read(buffer, 31);
assertThat(buffer.readUtf8())
.isEqualTo("simply is... it's not possible.");
}
@Test public void testAppend() throws Exception {
java.nio.file.Path path = temporaryFolder.newFile().toPath();
Buffer buffer = new Buffer().writeUtf8(quote);
Sink sink;
BufferedSource source;
sink = new FileChannelSink(FileChannel.open(path, w), Timeout.NONE);
sink.write(buffer, 75);
sink.close();
assertTrue(Files.exists(path));
assertEquals(75, Files.size(path));
source = Okio.buffer(new FileChannelSource(FileChannel.open(path, r), Timeout.NONE));
assertThat(source.readUtf8())
.isEqualTo("John, the kind of control you're attempting simply is... it's not possible.");
sink = new FileChannelSink(FileChannel.open(path, append), Timeout.NONE);
sink.write(buffer, buffer.size());
sink.close();
assertTrue(Files.exists(path));
assertEquals(quote.length(), Files.size(path));
source = Okio.buffer(new FileChannelSource(FileChannel.open(path, r), Timeout.NONE));
assertThat(source.readUtf8())
.isEqualTo(quote);
}
}
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