package io.vertx.test.core;
import io.vertx.core.impl.IsolatingClassLoader;
import io.vertx.core.json.JsonObject;
import org.junit.Before;
import org.junit.Test;
import java.io.File;
import java.io.InputStream;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.Collections;
import java.util.Enumeration;
import java.util.List;
import java.util.Scanner;
import static org.junit.Assert.*;
/**
* Unit tests for {@link io.vertx.core.impl.IsolatingClassLoader}
*/
public class IsolatingClassLoaderTest {
private String resourceName = "resource.json";
private URL url1;
private URL url2;
private URL url3;
private URLClassLoader ucl;
private IsolatingClassLoader icl;
@Before
public void setUp() throws Exception {
String basePath = "src/test/resources/icl";
url1 = new File(basePath, "pkg1").toURI().toURL();
url2 = new File(basePath, "pkg2").toURI().toURL();
url3 = new File(basePath, "pkg3").toURI().toURL();
ucl = new URLClassLoader(new URL[]{url2, url3});
icl = new IsolatingClassLoader(new URL[]{url1}, ucl, null);
}
@Test
public void testGetResource() throws Exception {
URL resource = ucl.getResource(resourceName);
checkResource(url2, resource);
resource = icl.getResource(resourceName);
checkResource(url1, resource);
}
@Test
public void testGetResourceNull() throws Exception {
resourceName = "null_resource";
URL resource = ucl.getResource(resourceName);
assertNull(resource);
resource = icl.getResource(resourceName);
assertNull(resource);
}
@Test
public void testGetResources() throws Exception {
Enumeration<URL> resources = ucl.getResources(resourceName);
List<URL> list = Collections.list(resources);
assertEquals(2, list.size());
checkResource(url2, list.get(0));
checkResource(url3, list.get(1));
resources = icl.getResources(resourceName);
list = Collections.list(resources);
assertEquals(3, list.size());
checkResource(url1, list.get(0));
checkResource(url2, list.get(1));
checkResource(url3, list.get(2));
}
private void checkResource(URL expected, URL resource) throws Exception {
assertEquals(expected.toString() + resourceName, resource.toString());
}
@Test
public void testGetResourcesNull() throws Exception {
resourceName = "null_resource";
Enumeration<URL> resources = ucl.getResources(resourceName);
List<URL> list = Collections.list(resources);
assertEquals(0, list.size());
resources = icl.getResources(resourceName);
list = Collections.list(resources);
assertEquals(0, list.size());
}
@Test
public void testGetResourceAsStream() throws Exception {
testGetResourceAsStream(2, ucl);
testGetResourceAsStream(1, icl);
}
private void testGetResourceAsStream(long ver, ClassLoader cl) throws Exception {
try (InputStream is = cl.getResourceAsStream(resourceName)) {
assertNotNull(is);
try (Scanner scanner = new Scanner(is, "UTF-8").useDelimiter("\\A")) {
assertTrue(scanner.hasNext());
JsonObject json = new JsonObject(scanner.next());
assertEquals(ver, json.getLong("ver", -1L).longValue());
}
}
}
}