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/*
* Copyright 2013 Google 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 com.google.common.jimfs;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableSet;
import java.io.Closeable;
import java.io.IOException;
import java.nio.file.ClosedFileSystemException;
import java.util.List;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
/**
* Tests for {@link FileSystemState}.
*
* @author Colin Decker
*/
@RunWith(JUnit4.class)
public class FileSystemStateTest {
private final TestRunnable onClose = new TestRunnable();
private final FileSystemState state = new FileSystemState(onClose);
@Test
public void testIsOpen() throws IOException {
assertTrue(state.isOpen());
state.close();
assertFalse(state.isOpen());
}
@Test
public void testCheckOpen() throws IOException {
state.checkOpen(); // does not throw
state.close();
try {
state.checkOpen();
fail();
} catch (ClosedFileSystemException expected) {
}
}
@Test
public void testClose_callsOnCloseRunnable() throws IOException {
assertEquals(0, onClose.runCount);
state.close();
assertEquals(1, onClose.runCount);
}
@Test
public void testClose_multipleTimesDoNothing() throws IOException {
state.close();
assertEquals(1, onClose.runCount);
state.close();
state.close();
assertEquals(1, onClose.runCount);
}
@Test
public void testClose_registeredResourceIsClosed() throws IOException {
TestCloseable resource = new TestCloseable();
state.register(resource);
assertFalse(resource.closed);
state.close();
assertTrue(resource.closed);
}
@Test
public void testClose_unregisteredResourceIsNotClosed() throws IOException {
TestCloseable resource = new TestCloseable();
state.register(resource);
assertFalse(resource.closed);
state.unregister(resource);
state.close();
assertFalse(resource.closed);
}
@Test
public void testClose_multipleRegisteredResourcesAreClosed() throws IOException {
List<TestCloseable> resources =
ImmutableList.of(new TestCloseable(), new TestCloseable(), new TestCloseable());
for (TestCloseable resource : resources) {
state.register(resource);
assertFalse(resource.closed);
}
state.close();
for (TestCloseable resource : resources) {
assertTrue(resource.closed);
}
}
@Test
public void testClose_resourcesThatThrowOnClose() {
List<TestCloseable> resources =
ImmutableList.of(
new TestCloseable(),
new ThrowsOnClose("a"),
new TestCloseable(),
new ThrowsOnClose("b"),
new ThrowsOnClose("c"),
new TestCloseable(),
new TestCloseable());
for (TestCloseable resource : resources) {
state.register(resource);
assertFalse(resource.closed);
}
try {
state.close();
fail();
} catch (IOException expected) {
Throwable[] suppressed = expected.getSuppressed();
assertEquals(2, suppressed.length);
ImmutableSet<String> messages =
ImmutableSet.of(
expected.getMessage(), suppressed[0].getMessage(), suppressed[1].getMessage());
assertEquals(ImmutableSet.of("a", "b", "c"), messages);
}
for (TestCloseable resource : resources) {
assertTrue(resource.closed);
}
}
private static class TestCloseable implements Closeable {
boolean closed = false;
@Override
public void close() throws IOException {
closed = true;
}
}
private static final class TestRunnable implements Runnable {
int runCount = 0;
@Override
public void run() {
runCount++;
}
}
private static class ThrowsOnClose extends TestCloseable {
private final String string;
private ThrowsOnClose(String string) {
this.string = string;
}
@Override
public void close() throws IOException {
super.close();
throw new IOException(string);
}
}
}
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