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/*
* Copyright (C) 2012 The Guava Authors
*
* 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.common.io;
import static com.google.common.io.TestOption.CLOSE_THROWS;
import static com.google.common.io.TestOption.OPEN_THROWS;
import static com.google.common.io.TestOption.READ_THROWS;
import static com.google.common.io.TestOption.WRITE_THROWS;
import static org.junit.Assert.assertArrayEquals;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.EnumSet;
/**
* Tests for the default implementations of {@code ByteSink} methods.
*
* @author Colin Decker
*/
public class ByteSinkTest extends IoTestCase {
private final byte[] bytes = newPreFilledByteArray(10000);
private TestByteSink sink;
@Override
protected void setUp() throws Exception {
sink = new TestByteSink();
}
public void testOpenBufferedStream() throws IOException {
OutputStream out = sink.openBufferedStream();
assertTrue(sink.wasStreamOpened());
assertFalse(sink.wasStreamClosed());
out.write(new byte[] {1, 2, 3, 4});
out.close();
assertTrue(sink.wasStreamClosed());
assertArrayEquals(new byte[] {1, 2, 3, 4}, sink.getBytes());
}
public void testWrite_bytes() throws IOException {
assertArrayEquals(new byte[0], sink.getBytes());
sink.write(bytes);
assertTrue(sink.wasStreamOpened() && sink.wasStreamClosed());
assertArrayEquals(bytes, sink.getBytes());
}
public void testWriteFrom_inputStream() throws IOException {
ByteArrayInputStream in = new ByteArrayInputStream(bytes);
sink.writeFrom(in);
assertTrue(sink.wasStreamOpened() && sink.wasStreamClosed());
assertArrayEquals(bytes, sink.getBytes());
}
public void testWriteFromStream_doesNotCloseThatStream() throws IOException {
TestInputStream in = new TestInputStream(new ByteArrayInputStream(new byte[10]));
assertFalse(in.closed());
sink.writeFrom(in);
assertFalse(in.closed());
}
public void testClosesOnErrors_copyingFromByteSourceThatThrows() {
for (TestOption option : EnumSet.of(OPEN_THROWS, READ_THROWS, CLOSE_THROWS)) {
TestByteSource failSource = new TestByteSource(new byte[10], option);
TestByteSink okSink = new TestByteSink();
try {
failSource.copyTo(okSink);
fail();
} catch (IOException expected) {
}
// ensure stream was closed IF it was opened (depends on implementation whether or not it's
// opened at all if source.newInputStream() throws).
assertTrue(
"stream not closed when copying from source with option: " + option,
!okSink.wasStreamOpened() || okSink.wasStreamClosed());
}
}
public void testClosesOnErrors_whenWriteThrows() {
TestByteSink failSink = new TestByteSink(WRITE_THROWS);
try {
new TestByteSource(new byte[10]).copyTo(failSink);
fail();
} catch (IOException expected) {
}
assertTrue(failSink.wasStreamClosed());
}
public void testClosesOnErrors_writingFromInputStreamThatThrows() {
TestByteSink okSink = new TestByteSink();
try {
TestInputStream in = new TestInputStream(new ByteArrayInputStream(new byte[10]), READ_THROWS);
okSink.writeFrom(in);
fail();
} catch (IOException expected) {
}
assertTrue(okSink.wasStreamClosed());
}
}
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