/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.sshd.common.util.io;
import java.io.IOException;
import java.io.InputStream;
import org.apache.sshd.common.util.buffer.BufferUtils;
import org.apache.sshd.util.test.BaseTestSupport;
import org.junit.FixMethodOrder;
import org.junit.Test;
import org.junit.runners.MethodSorters;
/**
* @author <a href="mailto:dev@mina.apache.org">Apache MINA SSHD Project</a>
*/
@FixMethodOrder(MethodSorters.NAME_ASCENDING)
public class EmptyInputStreamTest extends BaseTestSupport {
public EmptyInputStreamTest() {
super();
}
@Test
public void testEmptyInputStream() throws IOException {
try (EmptyInputStream in = new EmptyInputStream()) {
testEmptyInputStream(in, false);
}
}
@Test
public void testCloseableEmptyInputStream() throws IOException {
try (EmptyInputStream in = new CloseableEmptyInputStream()) {
testEmptyInputStream(in, true);
}
}
private void testEmptyInputStream(InputStream in, boolean failAfterClose) throws IOException {
testEmptyInputStream("open", in, false);
in.close();
testEmptyInputStream("closed", in, failAfterClose);
}
private void testEmptyInputStream(String message, InputStream in, boolean errorExpected) {
assertFalse(message + ": unexpected markSupported()", in.markSupported());
try {
in.mark(Long.SIZE);
fail(message + ": unexpected mark success");
} catch (UnsupportedOperationException e) {
// expected
}
try {
int len = in.available();
assertFalse(message + ": Unexpected success in available(): " + len, errorExpected);
assertEquals(message + ": Mismatched available() result", 0, len);
} catch (IOException e) {
assertTrue(message + ": Unexpected error on available(): " + e.getMessage(), errorExpected);
}
try {
int data = in.read();
assertFalse(message + ": Unexpected success in read(): " + data, errorExpected);
assertEquals(message + ": Mismatched read() result", -1, data);
} catch (IOException e) {
assertTrue(message + ": Unexpected error on read(): " + e.getMessage(), errorExpected);
}
byte[] bytes = new byte[Byte.SIZE];
try {
int len = in.read(bytes);
assertFalse(message + ": Unexpected success in read([]): " + BufferUtils.toHex(':', bytes), errorExpected);
assertEquals(message + ": Mismatched read([]) result", -1, len);
} catch (IOException e) {
assertTrue(message + ": Unexpected error on read([]): " + e.getMessage(), errorExpected);
}
try {
int len = in.read(bytes, 0, bytes.length);
assertFalse(message + ": Unexpected success in read([],int,int): " + BufferUtils.toHex(':', bytes), errorExpected);
assertEquals(message + ": Mismatched read([],int,int) result", -1, len);
} catch (IOException e) {
assertTrue(message + ": Unexpected error on read([],int,int): " + e.getMessage(), errorExpected);
}
try {
long len = in.skip(Byte.MAX_VALUE);
assertFalse(message + ": Unexpected success in skip(): " + len, errorExpected);
assertEquals(message + ": Mismatched skip() result", 0L, len);
} catch (IOException e) {
assertTrue(message + ": Unexpected error on skip(): " + e.getMessage(), errorExpected);
}
try {
in.reset();
assertFalse(message + ": Unexpected success in reset()", errorExpected);
} catch (IOException e) {
assertTrue(message + ": Unexpected error on reset(): " + e.getMessage(), errorExpected);
}
}
}