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/*
* Copyright (C) 2007 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 org.easymock.EasyMock.createStrictMock;
import static org.easymock.EasyMock.expectLastCall;
import static org.easymock.EasyMock.replay;
import static org.easymock.EasyMock.reset;
import static org.easymock.EasyMock.verify;
import junit.framework.TestCase;
import java.io.Closeable;
import java.io.IOException;
/**
* Unit tests for {@link Closeables}.
*
* <p>Checks proper closing behavior, and ensures that
* IOExceptions on Closeable.close() are not
* propagated out from the {@link Closeables#close} method if {@code
* swallowException} is true.
*
* @author Michael Lancaster
*/
public class CloseablesTest extends TestCase {
private Closeable mockCloseable;
public void testClose_closeableClean() throws IOException {
// make sure that no exception is thrown regardless of value of
// 'swallowException' when the mock does not throw an exception.
setupCloseable(false);
doClose(mockCloseable, false, false);
setupCloseable(false);
doClose(mockCloseable, true, false);
}
public void testClose_closeableWithEatenException() throws IOException {
// make sure that no exception is thrown if 'swallowException' is true
// when the mock does throw an exception.
setupCloseable(true);
doClose(mockCloseable, true);
}
public void testClose_closeableWithThrownException() throws IOException {
// make sure that the exception is thrown if 'swallowException' is false
// when the mock does throw an exception.
setupCloseable(true);
doClose(mockCloseable, false);
}
public void testCloseQuietly_closeableWithEatenException()
throws IOException {
// make sure that no exception is thrown by CloseQuietly when the mock does
// throw an exception on close
setupCloseable(true);
Closeables.closeQuietly(mockCloseable);
}
public void testCloseNull() throws IOException {
Closeables.close(null, true);
Closeables.close(null, false);
Closeables.closeQuietly(null);
}
@Override protected void setUp() throws Exception {
mockCloseable = createStrictMock(Closeable.class);
}
private void expectThrown() {
expectLastCall().andThrow(new IOException("This should only appear in the "
+ "logs. It should not be rethrown."));
}
// Set up a closeable to expect to be closed, and optionally to throw an
// exception.
private void setupCloseable(boolean shouldThrow) throws IOException {
reset(mockCloseable);
mockCloseable.close();
if (shouldThrow) {
expectThrown();
}
replay(mockCloseable);
}
private void doClose(Closeable closeable, boolean swallowException) {
doClose(closeable, swallowException, !swallowException);
}
// Close the closeable using the Closeables, passing in the swallowException
// parameter. expectThrown determines whether we expect an exception to
// be thrown by Closeables.close;
private void doClose(Closeable closeable, boolean swallowException,
boolean expectThrown) {
try {
Closeables.close(closeable, swallowException);
if (expectThrown) {
fail("Didn't throw exception.");
}
} catch (IOException e) {
if (!expectThrown) {
fail("Threw exception");
}
}
verify(closeable);
}
}
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