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package org.glassfish.jersey.server.internal.scanning;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Enumeration;
import java.util.jar.JarEntry;
import java.util.jar.JarFile;
import java.util.regex.Pattern;
import org.junit.Before;
import org.junit.Test;
import org.junit.experimental.theories.DataPoint;
import org.junit.experimental.theories.Theories;
import org.junit.experimental.theories.Theory;
import org.junit.runner.RunWith;
import static org.hamcrest.CoreMatchers.equalTo;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertThat;
import static org.junit.Assert.fail;
/**
* @author Martin Snyder
*/
@RunWith(Theories.class)
public class JarFileScannerTest {
@DataPoint
public static final boolean RECURSIVE = true;
@DataPoint
public static final boolean NON_RECURSIVE = false;
private String jaxRsApiPath;
@Before
public void setUp() throws Exception {
final String classPath = System.getProperty("java.class.path");
final String[] entries = classPath.split(System.getProperty("path.separator"));
for (final String entry : entries) {
if (entry.contains("javax.ws.rs-api")) {
jaxRsApiPath = entry;
break;
}
}
if (jaxRsApiPath == null) {
fail("Could not find javax.ws.rs-api.");
}
}
@Test
public void testRecursiveResourceEnumerationOfAllPackages() throws IOException {
final int actualEntries = countJarEntriesByPattern(Pattern.compile(".*\\.(class|properties|xml)"));
final int scannedEntries = countJarEntriesUsingScanner("", true);
assertThat("Failed to enumerate all contents of javax.ws.rs-api", scannedEntries, equalTo(actualEntries));
}
@Test
public void testRecursiveClassEnumerationWithExistantPackage() throws IOException {
final int actualEntries = countJarEntriesByPattern(Pattern.compile("javax/ws/rs/.*\\.class"));
final int scannedEntries = countJarEntriesUsingScanner("javax/ws/rs", true);
assertThat("Failed to enumerate all contents of javax.ws.rs-api", scannedEntries, equalTo(actualEntries));
}
@Test
public void testNonRecursiveClassEnumerationWithExistantPackage() throws IOException {
final int actualEntries = countJarEntriesByPattern(Pattern.compile("javax/ws/rs/[^/]*\\.class"));
final int scannedEntries = countJarEntriesUsingScanner("javax/ws/rs", false);
assertThat("Failed to enumerate package 'javax.ws.rs' of javax.ws.rs-api", scannedEntries, equalTo(actualEntries));
}
@Test
public void testRecursiveClassEnumerationWithOptionalTrailingSlash() throws IOException {
final int scannedEntriesWithoutSlash = countJarEntriesUsingScanner("javax/ws/rs", true);
final int scannedEntriesWithSlash = countJarEntriesUsingScanner("javax/ws/rs/", true);
assertThat("Adding a trailing slash incorrectly affects recursive scanning", scannedEntriesWithSlash,
equalTo(scannedEntriesWithoutSlash));
}
@Test
public void testNonRecursiveClassEnumerationWithOptionalTrailingSlash() throws IOException {
final int scannedEntriesWithoutSlash = countJarEntriesUsingScanner("javax/ws/rs", false);
final int scannedEntriesWithSlash = countJarEntriesUsingScanner("javax/ws/rs/", false);
assertThat("Adding a trailing slash incorrectly affects recursive scanning", scannedEntriesWithSlash,
equalTo(scannedEntriesWithoutSlash));
}
private int countJarEntriesByPattern(final Pattern pattern) throws IOException {
int matchingEntries = 0;
try (final JarFile jarFile = new JarFile(this.jaxRsApiPath)) {
final Enumeration<JarEntry> entries = jarFile.entries();
while (entries.hasMoreElements()) {
final JarEntry entry = entries.nextElement();
if (pattern.matcher(entry.getName()).matches()) {
matchingEntries++;
}
}
}
return matchingEntries;
}
private int countJarEntriesUsingScanner(final String parent, final boolean recursive) throws IOException {
int scannedEntryCount = 0;
try (final InputStream jaxRsApi = new FileInputStream(this.jaxRsApiPath)) {
final JarFileScanner jarFileScanner = new JarFileScanner(jaxRsApi, parent, recursive);
while (jarFileScanner.hasNext()) {
// Fetch next entry.
jarFileScanner.next();
// JERSEY-2175 and JERSEY-2197:
// This test doesn't actually do anything with the input stream, but it is important that it
// open/close the stream to simulate actual usage. The reported defect is only exposed if you
// call open/close in some fashion.
try (final InputStream classStream = jarFileScanner.open()) {
scannedEntryCount++;
}
}
}
return scannedEntryCount;
}
@Theory
public void testClassEnumerationWithNonexistentPackage(final boolean recursive) throws IOException {
try (final InputStream jaxRsApi = new FileInputStream(this.jaxRsApiPath)) {
final JarFileScanner jarFileScanner = new JarFileScanner(jaxRsApi, "javax/ws/r", recursive);
assertFalse("Unexpectedly found package 'javax.ws.r' in javax.ws.rs-api", jarFileScanner.hasNext());
}
}
@Theory
public void testClassEnumerationWithClassPrefix(final boolean recursive) throws IOException {
try (final InputStream jaxRsApi = new FileInputStream(this.jaxRsApiPath)) {
final JarFileScanner jarFileScanner = new JarFileScanner(jaxRsApi, "javax/ws/rs/GE", recursive);
assertFalse("Unexpectedly found package 'javax.ws.rs.GE' in javax.ws.rs-api", jarFileScanner.hasNext());
}
}
}