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/*
* Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/* @test
* @bug 4313887 6865748
* @summary Unit test for java.nio.file.Files.walkFileTree
*/
import java.nio.file.*;
import java.nio.file.attribute.BasicFileAttributes;
import java.io.IOException;
import java.util.*;
public class Nulls {
static void npeExpected() {
throw new RuntimeException("NullPointerException expected");
}
public static void main(String[] args) throws IOException {
try {
Files.walkFileTree(null, EnumSet.noneOf(FileVisitOption.class),
Integer.MAX_VALUE, new SimpleFileVisitor<Path>(){});
npeExpected();
} catch (NullPointerException e) {
}
try {
Files.walkFileTree(Paths.get("."), null, Integer.MAX_VALUE,
new SimpleFileVisitor<Path>(){});
npeExpected();
} catch (NullPointerException e) {
}
try {
Files.walkFileTree(Paths.get("."), EnumSet.noneOf(FileVisitOption.class),
-1, new SimpleFileVisitor<Path>(){});
throw new RuntimeException("IllegalArgumentExpected expected");
} catch (IllegalArgumentException e) {
}
try {
Set<FileVisitOption> opts = new HashSet<>(1);
opts.add(null);
Files.walkFileTree(Paths.get("."), opts, Integer.MAX_VALUE,
new SimpleFileVisitor<Path>(){});
npeExpected();
} catch (NullPointerException e) {
}
try {
Files.walkFileTree(Paths.get("."), EnumSet.noneOf(FileVisitOption.class),
Integer.MAX_VALUE, null);
npeExpected();
} catch (NullPointerException e) {
}
SimpleFileVisitor<Path> visitor = new SimpleFileVisitor<Path>() { };
boolean ranTheGauntlet = false;
Path dir = Paths.get(".");
BasicFileAttributes attrs = Files.readAttributes(dir, BasicFileAttributes.class);
try { visitor.preVisitDirectory(null, attrs);
} catch (NullPointerException x0) {
try { visitor.preVisitDirectory(dir, null);
} catch (NullPointerException x1) {
try { visitor.visitFile(null, attrs);
} catch (NullPointerException x2) {
try { visitor.visitFile(dir, null);
} catch (NullPointerException x3) {
try { visitor.visitFileFailed(null, new IOException());
} catch (NullPointerException x4) {
try { visitor.visitFileFailed(dir, null);
} catch (NullPointerException x5) {
try { visitor.postVisitDirectory(null, new IOException());
} catch (NullPointerException x6) {
// if we get here then all visit* methods threw NPE as expected
ranTheGauntlet = true;
}}}}}}}
if (!ranTheGauntlet)
throw new RuntimeException("A visit method did not throw NPE");
}
}
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