/*
* Copyright (c) 2014, 2016, 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
* @summary Basic test of jrt file system provider
* @run testng Basic
*/
import java.io.InputStream;
import java.io.IOException;
import java.io.DataInputStream;
import java.nio.file.DirectoryStream;
import java.nio.file.InvalidPathException;
import java.nio.file.Files;
import java.nio.file.FileSystem;
import java.nio.file.FileSystems;
import java.nio.file.Path;
import java.nio.file.PathMatcher;
import java.nio.file.Paths;
import java.net.URI;
import java.util.Collections;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.NoSuchElementException;
import java.util.stream.Stream;
import org.testng.annotations.AfterClass;
import org.testng.annotations.BeforeClass;
import org.testng.annotations.DataProvider;
import org.testng.annotations.Test;
import static org.testng.Assert.assertEquals;
import static org.testng.Assert.assertNotEquals;
import static org.testng.Assert.assertNotNull;
import static org.testng.Assert.assertTrue;
import static org.testng.Assert.assertFalse;
/**
* Basic tests for jrt:/ file system provider.
*/
public class Basic {
private FileSystem theFileSystem;
private FileSystem fs;
private boolean isExplodedBuild = false;
@BeforeClass
public void setup() {
theFileSystem = FileSystems.getFileSystem(URI.create("jrt:/"));
Path javaHomeDir = Paths.get(System.getProperty("java.home"));
Path jrtJarPath = javaHomeDir.resolve("jrt-fs.jar");
Path modulesPath = javaHomeDir.resolve("lib/modules");
isExplodedBuild = !Files.exists(jrtJarPath)
&& !Files.exists(modulesPath);
if (Files.notExists(jrtJarPath)
&& Files.notExists(modulesPath)) {
System.out.printf("Following files not exist: %s, %s",
jrtJarPath.toString(), modulesPath.toString());
System.out.println();
System.out.println("It is most probably an exploded build."
+ " Skip non-default FileSystem testing.");
return;
}
Map<String, String> env = new HashMap<>();
// set java.home property to be underlying java.home
// so that jrt-fs.jar loading is exercised.
env.put("java.home", System.getProperty("java.home"));
try {
fs = FileSystems.newFileSystem(URI.create("jrt:/"), env);
} catch (IOException ioExp) {
throw new RuntimeException(ioExp);
}
}
@AfterClass
public void tearDown() {
try {
fs.close();
} catch (Exception ignored) {}
}
private FileSystem selectFileSystem(boolean theDefault) {
return theDefault? theFileSystem : fs;
}
// Checks that the given FileSystem is a jrt file system.
private void checkFileSystem(FileSystem fs) {
assertTrue(fs.provider().getScheme().equalsIgnoreCase("jrt"));
assertTrue(fs.isOpen());
assertTrue(fs.isReadOnly());
assertEquals(fs.getSeparator(), "/");
// one root
Iterator<Path> roots = fs.getRootDirectories().iterator();
assertTrue(roots.next().toString().equals("/"));
assertFalse(roots.hasNext());
}
@Test
public void testGetFileSystem() {
FileSystem fs = FileSystems.getFileSystem(URI.create("jrt:/"));
checkFileSystem(fs);
// getFileSystem should return the same object each time
assertTrue(fs == FileSystems.getFileSystem(URI.create("jrt:/")));
}
@Test(expectedExceptions = UnsupportedOperationException.class)
public void testCloseFileSystem() throws Exception {
FileSystem fs = FileSystems.getFileSystem(URI.create("jrt:/"));
fs.close(); // should throw UOE
}
@Test
public void testNewFileSystem() throws Exception {
FileSystem theFileSystem = FileSystems.getFileSystem(URI.create("jrt:/"));
Map<String, ?> env = Collections.emptyMap();
try (FileSystem fs = FileSystems.newFileSystem(URI.create("jrt:/"), env)) {
checkFileSystem(fs);
assertTrue(fs != theFileSystem);
}
}
@Test
public void testNewFileSystemWithJavaHome() throws Exception {
if (isExplodedBuild) {
System.out.println("Skip testNewFileSystemWithJavaHome"
+ " since this is an exploded build");
return;
}
Map<String, String> env = new HashMap<>();
// set java.home property to be underlying java.home
// so that jrt-fs.jar loading is exercised.
env.put("java.home", System.getProperty("java.home"));
try (FileSystem fs = FileSystems.newFileSystem(URI.create("jrt:/"), env)) {
checkFileSystem(fs);
// jrt-fs.jar classes are loaded by another (non-boot) loader in this case
assertNotNull(fs.provider().getClass().getClassLoader());
}
}
@DataProvider(name = "knownClassFiles")
private Object[][] knownClassFiles() {
return new Object[][] {
{ "/modules/java.base/java/lang/Object.class", true },
{ "modules/java.base/java/lang/Object.class", true },
{ "/modules/java.base/java/lang/Object.class", false },
{ "modules/java.base/java/lang/Object.class", false },
};
}
@Test(dataProvider = "knownClassFiles")
public void testKnownClassFiles(String path, boolean theDefault) throws Exception {
if (isExplodedBuild && !theDefault) {
System.out.println("Skip testKnownClassFiles with non-default FileSystem");
return;
}
FileSystem fs = selectFileSystem(theDefault);
Path classFile = fs.getPath(path);
assertTrue(Files.isRegularFile(classFile));
assertTrue(Files.size(classFile) > 0L);
// check magic number
try (InputStream in = Files.newInputStream(classFile)) {
int magic = new DataInputStream(in).readInt();
assertEquals(magic, 0xCAFEBABE);
}
}
@DataProvider(name = "knownDirectories")
private Object[][] knownDirectories() {
return new Object[][] {
{ "/", true },
{ "." , true },
{ "./", true },
{ "/.", true },
{ "/./", true },
{ "/modules/java.base/..", true },
{ "/modules/java.base/../", true },
{ "/modules/java.base/../.", true },
{ "/modules/java.base", true },
{ "/modules/java.base/java/lang", true },
{ "modules/java.base/java/lang", true },
{ "/modules/java.base/java/lang/", true },
{ "modules/java.base/java/lang/", true },
{ "/", false },
{ "." , false },
{ "./", false },
{ "/.", false },
{ "/./", false },
{ "/modules/java.base/..", false },
{ "/modules/java.base/../", false },
{ "/modules/java.base/../.", false },
{ "/modules/java.base", false },
{ "/modules/java.base/java/lang", false },
{ "modules/java.base/java/lang", false },
{ "/modules/java.base/java/lang/", false },
{ "modules/java.base/java/lang/", false },
};
}
@Test(dataProvider = "knownDirectories")
public void testKnownDirectories(String path, boolean theDefault) throws Exception {
if (isExplodedBuild && !theDefault) {
System.out.println("Skip testKnownDirectories with non-default FileSystem");
return;
}
FileSystem fs = selectFileSystem(theDefault);
Path dir = fs.getPath(path);
assertTrue(Files.isDirectory(dir));
// directory should not be empty
try (Stream<Path> stream = Files.list(dir)) {
assertTrue(stream.count() > 0L);
}
try (Stream<Path> stream = Files.walk(dir)) {
assertTrue(stream.count() > 0L);
}
}
@DataProvider(name = "topLevelPkgDirs")
private Object[][] topLevelPkgDirs() {
return new Object[][] {
{ "/java/lang" },
{ "java/lang" },
{ "/java/util" },
{ "java/util" },
};
}
@Test(dataProvider = "topLevelPkgDirs")
public void testNotExists(String path) throws Exception {
FileSystem fs = FileSystems.getFileSystem(URI.create("jrt:/"));
Path dir = fs.getPath(path);
// package directories should not be there at top level
assertTrue(Files.notExists(dir));
}
/**
* Test the URI of every file in the jrt file system
*/
@Test
public void testToAndFromUri() throws Exception {
FileSystem fs = FileSystems.getFileSystem(URI.create("jrt:/"));
Path top = fs.getPath("/");
try (Stream<Path> stream = Files.walk(top)) {
stream.forEach(path -> {
URI u = path.toUri();
assertTrue(u.getScheme().equalsIgnoreCase("jrt"));
assertFalse(u.isOpaque());
assertTrue(u.getAuthority() == null);
assertEquals(u.getPath(), path.toAbsolutePath().toString());
Path p = Paths.get(u);
assertEquals(p, path);
});
}
}
@Test
public void testDirectoryNames() throws Exception {
FileSystem fs = FileSystems.getFileSystem(URI.create("jrt:/"));
Path top = fs.getPath("/");
// check that directory names do not have trailing '/' char
try (Stream<Path> stream = Files.walk(top)) {
stream.skip(1).filter(Files::isDirectory).forEach(path -> {
assertFalse(path.toString().endsWith("/"));
});
}
}
@DataProvider(name = "pathPrefixs")
private Object[][] pathPrefixes() {
return new Object[][] {
{ "/" },
{ "modules/java.base/java/lang" },
{ "./modules/java.base/java/lang" },
{ "/modules/java.base/java/lang" },
{ "/./modules/java.base/java/lang" },
{ "modules/java.base/java/lang/" },
{ "./modules/java.base/java/lang/" },
{ "/./modules/java.base/java/lang/" },
};
}
// @Test(dataProvider = "pathPrefixes")
public void testParentInDirList(String dir) throws Exception {
FileSystem fs = FileSystems.getFileSystem(URI.create("jrt:/"));
Path base = fs.getPath(dir);
try (DirectoryStream<Path> stream = Files.newDirectoryStream(base)) {
for (Path entry: stream) {
assertTrue( entry.getParent().equals(base),
base.toString() + "-> " + entry.toString() );
}
}
}
@DataProvider(name = "dirStreamStringFilterData")
private Object[][] dirStreamStringFilterData() {
return new Object[][] {
{ "/modules/java.base/java/lang", "/reflect" },
{ "/modules/java.base/java/lang", "/Object.class" },
{ "/modules/java.base/java/util", "/stream" },
{ "/modules/java.base/java/util", "/List.class" },
};
}
@Test(dataProvider = "dirStreamStringFilterData")
public void testDirectoryStreamStringFilter(String dir, String filter) throws Exception {
FileSystem fs = FileSystems.getFileSystem(URI.create("jrt:/"));
Path base = fs.getPath(dir);
try (DirectoryStream<Path> stream =
Files.newDirectoryStream(base, p->!p.toString().endsWith(filter))) {
for (Path entry: stream) {
assertFalse(entry.toString().contains(filter),
"filtered path seen: " + filter);
}
}
// make sure without filter, we do see that matching entry!
boolean seen = false;
try (DirectoryStream<Path> stream = Files.newDirectoryStream(base)) {
for (Path entry: stream) {
if (entry.toString().endsWith(filter)) {
seen = true;
break;
}
}
}
assertTrue(seen, "even without filter " + filter + " is missing");
}
@DataProvider(name = "dirStreamFilterData")
private Object[][] dirStreamFilterData() {
return new Object[][] {
{
"/",
(DirectoryStream.Filter<Path>)(Files::isDirectory),
"isDirectory"
},
{
"/modules/java.base/java/lang",
(DirectoryStream.Filter<Path>)(Files::isRegularFile),
"isFile"
}
};
}
@Test(dataProvider = "dirStreamFilterData")
private void testDirectoryStreamFilter(String dir, DirectoryStream.Filter filter,
String name) throws Exception {
FileSystem fs = FileSystems.getFileSystem(URI.create("jrt:/"));
Path base = fs.getPath(dir);
try (DirectoryStream<Path> stream = Files.newDirectoryStream(base, filter)) {
for (Path entry: stream) {
assertTrue(filter.accept(entry), "filtered path seen: " + name);
}
}
// make sure without filter, we do see that matching entry!
boolean seen = false;
try (DirectoryStream<Path> stream = Files.newDirectoryStream(base)) {
for (Path entry: stream) {
if (filter.accept(entry)) {
seen = true;
break;
}
}
}
assertTrue(seen, "even without filter " + name + " is missing");
}
@Test
private void testDirectoryStreamIterator() throws Exception {
// run the tests with null filter (no filter)
dirStreamIteratorTest(null);
// run the same tests with trivial "accept all" filter
dirStreamIteratorTest(p->true);
// two other non-trivial ones
dirStreamIteratorTest(Files::isDirectory);
dirStreamIteratorTest(Files::isRegularFile);
}
private void dirStreamIteratorTest(DirectoryStream.Filter<Path> filter)
throws Exception {
FileSystem fs = FileSystems.getFileSystem(URI.create("jrt:/"));
// This test assumes at least there are two elements in "java/lang"
// package with any filter passed. don't change to different path here!
Path dir = fs.getPath("/modules/java.base/java/lang");
try (DirectoryStream<Path> stream = Files.newDirectoryStream(dir, filter)) {
Iterator<Path> itr = stream.iterator();
itr.hasNext();
Path path1 = itr.next();
// missing second hasNext call
Path path2 = itr.next();
assertNotEquals(path1, path2);
}
try (DirectoryStream<Path> stream = Files.newDirectoryStream(dir, filter)) {
Iterator<Path> itr = stream.iterator();
// no hasNext calls at all
Path path1 = itr.next();
Path path2 = itr.next();
assertNotEquals(path1, path2);
}
int numEntries = 0;
try (DirectoryStream<Path> stream = Files.newDirectoryStream(dir, filter)) {
Iterator<Path> itr = stream.iterator();
while (itr.hasNext()) {
numEntries++;
itr.next();
}
// reached EOF, next call should result in exception
try {
itr.next();
throw new AssertionError("should have thrown exception");
} catch (NoSuchElementException nsee) {
System.out.println("got NoSuchElementException as expected");
}
}
// redundant hasNext calls
try (DirectoryStream<Path> stream = Files.newDirectoryStream(dir, filter)) {
Iterator<Path> itr = stream.iterator();
// any number of hasNext should definitely stay at first element
for (int i = 0; i < 2*numEntries; i++) {
itr.hasNext();
}
for (int j = 0; j < numEntries; j++) {
itr.next();
}
// exactly count number of entries!
assertFalse(itr.hasNext());
}
}
@DataProvider(name = "hiddenPaths")
private Object[][] hiddenPaths() {
return new Object[][] {
{ "/META-INF" },
{ "/META-INF/services" },
{ "/META-INF/services/java.nio.file.spi.FileSystemProvider" },
{ "/modules/java.base/packages.offsets" },
{ "/modules/java.instrument/packages.offsets" },
{ "/modules/jdk.zipfs/packages.offsets" },
{ "/modules/java.base/_the.java.base.vardeps" },
{ "/modules/java.base/_the.java.base_batch" },
{ "/java/lang" },
{ "/java/util" },
};
}
@Test(dataProvider = "hiddenPaths")
public void testHiddenPathsNotExposed(String path) throws Exception {
FileSystem fs = FileSystems.getFileSystem(URI.create("jrt:/"));
assertTrue(Files.notExists(fs.getPath(path)), path + " should not exist");
}
@DataProvider(name = "pathGlobPatterns")
private Object[][] pathGlobPatterns() {
return new Object[][] {
{ "/modules/*", "/modules/java.base", true },
{ "/modules/*", "/modules/java.base/java", false },
{ "/modules/j*", "/modules/java.base", true },
{ "/modules/J*", "/modules/java.base", false },
{ "**.class", "/modules/java.base/java/lang/Object.class", true },
{ "**.java", "/modules/java.base/java/lang/Object.class", false },
{ "**java/*", "/modules/java.base/java/lang", true },
{ "**java/lang/ref*", "/modules/java.base/java/lang/reflect", true },
{ "**java/lang/ref*", "/modules/java.base/java/lang/ref", true },
{ "**java/lang/ref?", "/modules/java.base/java/lang/ref", false },
{ "**java/lang/{ref,refl*}", "/modules/java.base/java/lang/ref", true },
{ "**java/lang/{ref,refl*}", "/modules/java.base/java/lang/reflect", true },
{ "**java/[a-u]?*/*.class", "/modules/java.base/java/util/Map.class", true },
{ "**java/util/[a-z]*.class", "/modules/java.base/java/util/TreeMap.class", false },
};
}
@Test(dataProvider = "pathGlobPatterns")
public void testGlobPathMatcher(String pattern, String path,
boolean expectMatch) throws Exception {
FileSystem fs = FileSystems.getFileSystem(URI.create("jrt:/"));
PathMatcher pm = fs.getPathMatcher("glob:" + pattern);
Path p = fs.getPath(path);
assertTrue(Files.exists(p), path);
assertTrue(!(pm.matches(p) ^ expectMatch),
p + (expectMatch? " should match " : " should not match ") +
pattern);
}
@DataProvider(name = "pathRegexPatterns")
private Object[][] pathRegexPatterns() {
return new Object[][] {
{ "/modules/.*", "/modules/java.base", true },
{ "/modules/[^/]*", "/modules/java.base/java", false },
{ "/modules/j.*", "/modules/java.base", true },
{ "/modules/J.*", "/modules/java.base", false },
{ ".*\\.class", "/modules/java.base/java/lang/Object.class", true },
{ ".*\\.java", "/modules/java.base/java/lang/Object.class", false },
{ ".*java/.*", "/modules/java.base/java/lang", true },
{ ".*java/lang/ref.*", "/modules/java.base/java/lang/reflect", true },
{ ".*java/lang/ref.*", "/modules/java.base/java/lang/ref", true },
{ ".*/java/lang/ref.+", "/modules/java.base/java/lang/ref", false },
{ ".*/java/lang/(ref|refl.*)", "/modules/java.base/java/lang/ref", true },
{ ".*/java/lang/(ref|refl.*)", "/modules/java.base/java/lang/reflect", true },
{ ".*/java/[a-u]?.*/.*\\.class", "/modules/java.base/java/util/Map.class", true },
{ ".*/java/util/[a-z]*\\.class", "/modules/java.base/java/util/TreeMap.class", false },
};
}
@Test(dataProvider = "pathRegexPatterns")
public void testRegexPathMatcher(String pattern, String path,
boolean expectMatch) throws Exception {
FileSystem fs = FileSystems.getFileSystem(URI.create("jrt:/"));
PathMatcher pm = fs.getPathMatcher("regex:" + pattern);
Path p = fs.getPath(path);
assertTrue(Files.exists(p), path);
assertTrue(!(pm.matches(p) ^ expectMatch),
p + (expectMatch? " should match " : " should not match ") +
pattern);
}
@Test
public void testPackagesAndModules() throws Exception {
FileSystem fs = FileSystems.getFileSystem(URI.create("jrt:/"));
assertTrue(Files.isDirectory(fs.getPath("/packages")));
assertTrue(Files.isDirectory(fs.getPath("/modules")));
}
@DataProvider(name = "packagesSubDirs")
private Object[][] packagesSubDirs() {
return new Object[][] {
{ "java.lang" },
{ "java.util" },
{ "java.nio" },
{ "jdk.nashorn.api.scripting" }
};
}
@Test(dataProvider = "packagesSubDirs")
public void testPackagesSubDirs(String pkg) throws Exception {
FileSystem fs = FileSystems.getFileSystem(URI.create("jrt:/"));
assertTrue(Files.isDirectory(fs.getPath("/packages/" + pkg)),
pkg + " missing");
}
@DataProvider(name = "packagesLinks")
private Object[][] packagesLinks() {
return new Object[][] {
{ "/packages/java.lang/java.base" },
{ "/packages/java.lang/java.instrument" },
{ "/packages/java/java.base" },
{ "/packages/java/java.instrument" },
{ "/packages/java/java.rmi" },
{ "/packages/java/java.sql" },
{ "/packages/javax/java.base" },
{ "/packages/javax/java.sql" },
{ "/packages/javax/java.xml" },
{ "/packages/javax/java.management" },
{ "/packages/java.util/java.base" },
{ "/packages/jdk.nashorn.api.scripting/jdk.scripting.nashorn" },
};
}
@Test(dataProvider = "packagesLinks")
public void testPackagesLinks(String link) throws Exception {
FileSystem fs = FileSystems.getFileSystem(URI.create("jrt:/"));
Path path = fs.getPath(link);
assertTrue(Files.exists(path), link + " missing");
assertTrue(Files.isSymbolicLink(path), path + " is not a link");
path = Files.readSymbolicLink(path);
assertEquals(path.toString(), "/modules" + link.substring(link.lastIndexOf("/")));
}
@DataProvider(name = "modulesSubDirs")
private Object[][] modulesSubDirs() {
return new Object[][] {
{ "java.base" },
{ "java.sql" },
{ "jdk.scripting.nashorn" },
};
}
@Test(dataProvider = "modulesSubDirs")
public void testModulesSubDirs(String module) throws Exception {
FileSystem fs = FileSystems.getFileSystem(URI.create("jrt:/"));
Path path = fs.getPath("/modules/" + module);
assertTrue(Files.isDirectory(path), module + " missing");
assertTrue(!Files.isSymbolicLink(path), path + " is a link");
}
@DataProvider(name="linkChases")
private Object[][] linkChases() {
return new Object[][] {
{ "/modules/java.base/java/lang" },
{ "/modules/java.base/java/util/Vector.class" },
{ "/modules/jdk.scripting.nashorn/jdk/nashorn" },
{ "/packages/java.lang/java.base/java/lang" },
{ "/packages/java.util/java.base/java/util/Vector.class" },
};
}
@Test(dataProvider = "linkChases")
public void testLinkChases(String link) throws Exception {
FileSystem fs = FileSystems.getFileSystem(URI.create("jrt:/"));
Path path = fs.getPath(link);
assertTrue(Files.exists(path), link);
}
@Test
public void testSymlinkDirList() throws Exception {
FileSystem fs = FileSystems.getFileSystem(URI.create("jrt:/"));
Path path = fs.getPath("/packages/java.lang/java.base");
assertTrue(Files.isSymbolicLink(path));
assertTrue(Files.isDirectory(path));
boolean javaSeen = false, javaxSeen = false;
try (DirectoryStream<Path> stream = Files.newDirectoryStream(path)) {
for (Path p : stream) {
String str = p.toString();
if (str.endsWith("/java")) {
javaSeen = true;
} else if (str.endsWith("javax")) {
javaxSeen = true;
}
}
}
assertTrue(javaSeen);
assertTrue(javaxSeen);
}
@Test
public void invalidPathTest() {
FileSystem fs = FileSystems.getFileSystem(URI.create("jrt:/"));
InvalidPathException ipe = null;
try {
boolean res = Files.exists(fs.getPath("/packages/\ud834\udd7b"));
assertFalse(res);
return;
} catch (InvalidPathException e) {
ipe = e;
}
assertTrue(ipe != null);
}
@DataProvider(name="packagesLinkedDirs")
private Object[][] packagesLinkedDirs() {
return new Object[][] {
{ "/packages/java.lang/java.base/java/lang/ref" },
{ "/./packages/java.lang/java.base/java/lang/ref" },
{ "packages/java.lang/java.base/java/lang/ref" },
{ "/packages/../packages/java.lang/java.base/java/lang/ref" },
{ "/packages/java.lang/java.base/java/util/zip" },
{ "/./packages/java.lang/java.base/java/util/zip" },
{ "packages/java.lang/java.base/java/util/zip" },
{ "/packages/../packages/java.lang/java.base/java/util/zip" },
{ "/packages/com.oracle/java.xml.ws/com" },
{ "/./packages/com.oracle/java.xml.ws/com" },
{ "packages/com.oracle/java.xml.ws/com" },
{ "/packages/../packages/com.oracle/java.xml.ws/com" }
};
}
// @bug 8141521: jrt file system's DirectoryStream reports child paths
// with wrong paths for directories under /packages
@Test(dataProvider = "packagesLinkedDirs")
public void dirStreamPackagesDirTest(String dirName) throws IOException {
FileSystem fs = FileSystems.getFileSystem(URI.create("jrt:/"));
Path path = fs.getPath(dirName);
int childCount = 0, dirPrefixOkayCount = 0;
try (DirectoryStream<Path> dirStream = Files.newDirectoryStream(path)) {
for (Path child : dirStream) {
childCount++;
if (child.toString().startsWith(dirName)) {
dirPrefixOkayCount++;
}
}
}
assertTrue(childCount != 0);
assertEquals(dirPrefixOkayCount, childCount);
}
@Test
public void objectClassSizeTest() throws Exception {
String path = "/modules/java.base/java/lang/Object.class";
FileSystem fs = FileSystems.getFileSystem(URI.create("jrt:/"));
Path classFile = fs.getPath(path);
assertTrue(Files.size(classFile) > 0L);
}
}