libcore/luni/src/test/java/tests/api/java/net/ProxySelectorTest.java

/* Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 tests.api.java.net;

import dalvik.annotation.TestTargetClass; 
import dalvik.annotation.TestTargets;
import dalvik.annotation.TestLevel;
import dalvik.annotation.TestTargetNew;

import java.io.IOException;
import java.net.InetSocketAddress;
import java.net.NetPermission;
import java.net.Proxy;
import java.net.ProxySelector;
import java.net.SocketAddress;
import java.net.SocketException;
import java.net.URI;
import java.net.URISyntaxException;
import java.security.Permission;
import java.util.List;
import java.util.Properties;

import junit.framework.TestCase;
import tests.util.TestEnvironment;

@TestTargetClass(ProxySelector.class) 
public class ProxySelectorTest extends TestCase {

    private static final String HTTP_PROXY_HOST = "127.0.0.1";

    private static final int HTTP_PROXY_PORT = 80;

    private static final String HTTPS_PROXY_HOST = "127.0.0.2";

    private static final int HTTPS_PROXY_PORT = 443;

    private static final String FTP_PROXY_HOST = "127.0.0.3";

    private static final int FTP_PROXY_PORT = 80;

    private static final String SOCKS_PROXY_HOST = "127.0.0.4";

    private static final int SOCKS_PROXY_PORT = 1080;

    private static URI httpUri;

    private static URI ftpUri;

    private static URI httpsUri;

    private static URI tcpUri;
    
    private List proxyList;
    
    private ProxySelector selector = ProxySelector.getDefault();
    
    static {
        try {
            httpUri = new URI("http://test.com");
            ftpUri = new URI("ftp://test.com");
            httpsUri = new URI("https://test.com");
            tcpUri = new URI("socket://host.com");
        } catch (URISyntaxException e) {

        }
    }

    /**
     * @tests java.net.ProxySelector#getDefault()
     */
    @TestTargetNew(
        level = TestLevel.PARTIAL_COMPLETE,
        notes = "This is a complete subset of tests for getDefault method.",
        method = "getDefault",
        args = {}
    )
    public void test_getDefault() {
        ProxySelector selector1 = ProxySelector.getDefault();
        assertNotNull(selector1);

        ProxySelector selector2 = ProxySelector.getDefault();
        assertSame(selector1, selector2);
    }

    /**
     * @tests java.net.ProxySelector#getDefault()
     */
    @TestTargetNew(
        level = TestLevel.PARTIAL_COMPLETE,
        notes = "This is a complete subset of tests for getDefault method.",
        method = "getDefault",
        args = {}
    )
    public void test_getDefault_Security() {
        SecurityManager orignalSecurityManager = System.getSecurityManager();
        try {
            System.setSecurityManager(new MockSecurityManager());
        } catch (SecurityException e) {
            System.err.println("No setSecurityManager permission.");
            System.err.println("test_getDefault_Security is not tested");
            return;
        }
        try {
            ProxySelector.getDefault();
            fail("should throw SecurityException");
        } catch (SecurityException e) {
            // expected
        } finally {
            System.setSecurityManager(orignalSecurityManager);
        }
    }

    /**
     * @tests java.net.ProxySelector#setDefault(ProxySelector)}
     */
    @TestTargets({
        @TestTargetNew(
            level = TestLevel.PARTIAL_COMPLETE,
            notes = "This is a complete subset of tests for setDefault method.",
            method = "setDefault",
            args = {java.net.ProxySelector.class}
        ),
        @TestTargetNew(
            level = TestLevel.COMPLETE,
            notes = "",
            method = "ProxySelector",
            args = {}
        )
    })
    public void test_setDefaultLjava_net_ProxySelector() {
        ProxySelector originalSelector = ProxySelector.getDefault();
        try {
            ProxySelector newSelector = new MockProxySelector();
            ProxySelector.setDefault(newSelector);
            assertSame(newSelector, ProxySelector.getDefault());
            // use null to unset
            ProxySelector.setDefault(null);
            assertSame(null, ProxySelector.getDefault());
        } finally {
            ProxySelector.setDefault(originalSelector);
        }
    }

    /**
     * @tests java.net.ProxySelector#setDefault(ProxySelector)}
     */
    @TestTargetNew(
        level = TestLevel.PARTIAL_COMPLETE,
        notes = "This is a complete subset of tests for setDefault method.",
        method = "setDefault",
        args = {java.net.ProxySelector.class}
    )
    public void test_setDefaultLjava_net_ProxySelector_Security() {
        ProxySelector originalSelector = ProxySelector.getDefault();
        SecurityManager orignalSecurityManager = System.getSecurityManager();
        try {
            System.setSecurityManager(new MockSecurityManager());
        } catch (SecurityException e) {
            System.err.println("No setSecurityManager permission.");
            System.err
                    .println("test_setDefaultLjava_net_ProxySelector_Security is not tested");
            return;
        }
        try {
            ProxySelector.setDefault(new MockProxySelector());
            fail("should throw SecurityException");
        } catch (SecurityException e) {
            // expected
        } finally {
            System.setSecurityManager(orignalSecurityManager);
            ProxySelector.setDefault(originalSelector);
        }
    }

    /**
     * @tests java.net.ProxySelector#select(URI)
     */
    @TestTargetNew(
        level = TestLevel.PARTIAL_COMPLETE,
        notes = "This is a complete subset of tests for select method.",
        method = "select",
        args = {java.net.URI.class}
    )
    public void test_selectLjava_net_URI_SelectExact()
            throws URISyntaxException {
        // no proxy, return a proxyList only contains NO_PROXY
        proxyList = selector.select(httpUri);
        assertProxyEquals(proxyList,Proxy.NO_PROXY);

        // set http proxy
        System.setProperty("http.proxyHost", HTTP_PROXY_HOST);
        System.setProperty("http.proxyPort", String.valueOf(HTTP_PROXY_PORT));
        // set https proxy
        System.setProperty("https.proxyHost", HTTPS_PROXY_HOST);
        System.setProperty("https.proxyPort", String.valueOf(HTTPS_PROXY_PORT));
        // set ftp proxy
        System.setProperty("ftp.proxyHost", FTP_PROXY_HOST);
        System.setProperty("ftp.proxyPort", String.valueOf(FTP_PROXY_PORT));
        // set socks proxy
        System.setProperty("socksProxyHost", SOCKS_PROXY_HOST);
        System.setProperty("socksProxyPort", String.valueOf(SOCKS_PROXY_PORT));

        proxyList = selector.select(httpUri);
        assertProxyEquals(proxyList,Proxy.Type.HTTP,HTTP_PROXY_HOST,HTTP_PROXY_PORT);

        proxyList = selector.select(httpsUri);
        assertProxyEquals(proxyList,Proxy.Type.HTTP,HTTPS_PROXY_HOST,HTTPS_PROXY_PORT);
        
        proxyList = selector.select(ftpUri);
        assertProxyEquals(proxyList,Proxy.Type.HTTP,FTP_PROXY_HOST,FTP_PROXY_PORT);
        
        proxyList = selector.select(tcpUri);
        assertProxyEquals(proxyList,Proxy.Type.SOCKS,SOCKS_PROXY_HOST,SOCKS_PROXY_PORT);

    }
    
    /**
     * @tests java.net.ProxySelector#select(URI)
     */
    @TestTargetNew(
        level = TestLevel.PARTIAL_COMPLETE,
        notes = "This is a complete subset of tests for select method.",
        method = "select",
        args = {java.net.URI.class}
    )
    public void test_selectLjava_net_URI_SelectExact_NullHost()
            throws URISyntaxException {
        // regression test for Harmony-1063
        httpUri = new URI("http://a@");
        ftpUri = new URI("ftp://a@");
        httpsUri = new URI("https://a@");
        tcpUri = new URI("socket://a@");
        // no proxy, return a proxyList only contains NO_PROXY
        proxyList = selector.select(httpUri);
        assertProxyEquals(proxyList, Proxy.NO_PROXY);

        // set http proxy
        System.setProperty("http.proxyHost", HTTP_PROXY_HOST);
        System.setProperty("http.proxyPort", String.valueOf(HTTP_PROXY_PORT));
        // set https proxy
        System.setProperty("https.proxyHost", HTTPS_PROXY_HOST);
        System.setProperty("https.proxyPort", String.valueOf(HTTPS_PROXY_PORT));
        // set ftp proxy
        System.setProperty("ftp.proxyHost", FTP_PROXY_HOST);
        System.setProperty("ftp.proxyPort", String.valueOf(FTP_PROXY_PORT));
        // set socks proxy
        System.setProperty("socksProxyHost", SOCKS_PROXY_HOST);
        System.setProperty("socksProxyPort", String.valueOf(SOCKS_PROXY_PORT));

        proxyList = selector.select(httpUri);
        assertProxyEquals(proxyList, Proxy.Type.HTTP, HTTP_PROXY_HOST,
                HTTP_PROXY_PORT);

        proxyList = selector.select(httpsUri);
        assertProxyEquals(proxyList, Proxy.Type.HTTP, HTTPS_PROXY_HOST,
                HTTPS_PROXY_PORT);

        proxyList = selector.select(ftpUri);
        assertProxyEquals(proxyList, Proxy.Type.HTTP, FTP_PROXY_HOST,
                FTP_PROXY_PORT);

        proxyList = selector.select(tcpUri);
        assertProxyEquals(proxyList, Proxy.Type.SOCKS, SOCKS_PROXY_HOST,
                SOCKS_PROXY_PORT);

    }

    /**
     * @tests java.net.ProxySelector#select(URI)
     */
    @TestTargetNew(
        level = TestLevel.PARTIAL_COMPLETE,
        notes = "This is a complete subset of tests for select method.",
        method = "select",
        args = {java.net.URI.class}
    )
    public void test_selectLjava_net_URI_SelectExact_DefaultPort()
            throws URISyntaxException {
        // set http proxy
        System.setProperty("http.proxyHost", HTTP_PROXY_HOST);

        // set https proxy
        System.setProperty("https.proxyHost", HTTPS_PROXY_HOST);
        // set ftp proxy
        System.setProperty("ftp.proxyHost", FTP_PROXY_HOST);
        // set socks proxy
        System.setProperty("socksProxyHost", SOCKS_PROXY_HOST);

        proxyList = selector.select(httpUri);
        assertProxyEquals(proxyList,Proxy.Type.HTTP,HTTP_PROXY_HOST,HTTP_PROXY_PORT);

        proxyList = selector.select(httpsUri);
        assertProxyEquals(proxyList,Proxy.Type.HTTP,HTTPS_PROXY_HOST,HTTPS_PROXY_PORT);
        
        proxyList = selector.select(ftpUri);
        assertProxyEquals(proxyList,Proxy.Type.HTTP,FTP_PROXY_HOST,FTP_PROXY_PORT);
        
        proxyList = selector.select(tcpUri);
        assertProxyEquals(proxyList,Proxy.Type.SOCKS,SOCKS_PROXY_HOST,SOCKS_PROXY_PORT);

    }

    /**
     * @tests java.net.ProxySelector#select(URI)
     */
    @TestTargetNew(
        level = TestLevel.PARTIAL_COMPLETE,
        notes = "This is a complete subset of tests for select method.",
        method = "select",
        args = {java.net.URI.class}
    )
    public void test_selectLjava_net_URI_SelectExact_InvalidPort()
            throws URISyntaxException {
        final String INVALID_PORT = "abc";
        
        // set http proxy
        System.setProperty("http.proxyHost", HTTP_PROXY_HOST);
        System.setProperty("http.proxyPort", INVALID_PORT);
        // set https proxy
        System.setProperty("https.proxyHost", HTTPS_PROXY_HOST);
        System.setProperty("https.proxyPort", INVALID_PORT);
        // set ftp proxy
        System.setProperty("ftp.proxyHost", FTP_PROXY_HOST);
        System.setProperty("ftp.proxyPort", INVALID_PORT);
        // set socks proxy
        System.setProperty("socksProxyHost", SOCKS_PROXY_HOST);
        System.setProperty("socksproxyPort", INVALID_PORT);

        proxyList = selector.select(httpUri);
        assertProxyEquals(proxyList,Proxy.Type.HTTP,HTTP_PROXY_HOST,HTTP_PROXY_PORT);

        proxyList = selector.select(httpsUri);
        assertProxyEquals(proxyList,Proxy.Type.HTTP,HTTPS_PROXY_HOST,HTTPS_PROXY_PORT);

        proxyList = selector.select(ftpUri);
        assertProxyEquals(proxyList,Proxy.Type.HTTP,FTP_PROXY_HOST,FTP_PROXY_PORT);

        proxyList = selector.select(tcpUri);
        assertProxyEquals(proxyList,Proxy.Type.SOCKS,SOCKS_PROXY_HOST,SOCKS_PROXY_PORT);
    }

    /**
     * @tests java.net.ProxySelector#select(URI)
     */
    // RI may fail this test case. 
    // Uncomment this test case when regex.jar is ready.
    /*
    public void test_selectLjava_net_URI_Select_NonProxyHosts()
            throws URISyntaxException {
        // RI's bug. Some RIs may fail this test case. 
        URI[] httpUris = { new URI("http://test.com"),
                new URI("http://10.10.1.2"), new URI("http://a"),
                new URI("http://def.abc.com") };
        URI[] ftpUris = { new URI("ftp://test.com"),
                new URI("ftp://10.10.1.2"), new URI("ftp://a"),
                new URI("ftp://def.abc.com") };
        
        // set http proxy
        System.setProperty("http.proxyHost", HTTP_PROXY_HOST);
        System.setProperty("http.nonProxyHosts", "a|b|tes*|10.10.*|*.abc.com");
        // set ftp proxy
        System.setProperty("ftp.proxyHost", FTP_PROXY_HOST);
        System.setProperty("ftp.nonProxyHosts", "a|b|tes*|10.10.*|*.abc.com");

        for (int i = 0; i < httpUris.length; i++) {
            proxyList = selector.select(httpUris[i]);
            assertProxyEquals(proxyList,Proxy.NO_PROXY);
        }

        for (int i = 0; i < ftpUris.length; i++) {
            proxyList = selector.select(ftpUris[i]);
            assertProxyEquals(proxyList,Proxy.NO_PROXY);
        }
    }*/

    /**
     * @tests java.net.ProxySelector#select(URI)
     */
    @TestTargetNew(
        level = TestLevel.PARTIAL_COMPLETE,
        notes = "This is a complete subset of tests for select method.",
        method = "select",
        args = {java.net.URI.class}
    )
    public void test_selectLjava_net_URI_SelectLikeHTTP()
            throws URISyntaxException {
        System.setProperty("http.proxyHost", "");
        // set https proxy
        System.setProperty("https.proxyHost", HTTPS_PROXY_HOST);
        System.setProperty("https.proxyPort", String.valueOf(HTTPS_PROXY_PORT));
        // set ftp proxy
        System.setProperty("ftp.proxyHost", FTP_PROXY_HOST);
        System.setProperty("ftp.proxyPort", String.valueOf(FTP_PROXY_PORT));
        // set socks proxy
        System.setProperty("socksProxyHost", SOCKS_PROXY_HOST);
        System.setProperty("socksProxyPort", String.valueOf(SOCKS_PROXY_PORT));

        proxyList = selector.select(httpUri);
        assertProxyEquals(proxyList,Proxy.Type.SOCKS,SOCKS_PROXY_HOST,SOCKS_PROXY_PORT);
    }

    /**
     * @tests java.net.ProxySelector#select(URI)
     */
    @TestTargetNew(
        level = TestLevel.PARTIAL_COMPLETE,
        notes = "This is a complete subset of tests for select method.",
        method = "select",
        args = {java.net.URI.class}
    )
    public void test_selectLjava_net_URI_SelectNoHTTP()
            throws URISyntaxException {
        // set https proxy
        System.setProperty("https.proxyHost", HTTPS_PROXY_HOST);
        System.setProperty("https.proxyPort", String.valueOf(HTTPS_PROXY_PORT));
        // set ftp proxy
        System.setProperty("ftp.proxyHost", FTP_PROXY_HOST);
        System.setProperty("ftp.proxyPort", String.valueOf(FTP_PROXY_PORT));

        proxyList = selector.select(httpUri);
        assertProxyEquals(proxyList,Proxy.NO_PROXY);
    }

    /**
     * @tests java.net.ProxySelector#select(URI)
     */
    @TestTargetNew(
        level = TestLevel.PARTIAL_COMPLETE,
        notes = "This is a complete subset of tests for select method.",
        method = "select",
        args = {java.net.URI.class}
    )
    public void test_selectLjava_net_URI_SelectLikeHTTPS()
            throws URISyntaxException {
        // set http proxy
        System.setProperty("http.proxyHost", HTTP_PROXY_HOST);
        System.setProperty("http.proxyPort", String.valueOf(HTTP_PROXY_PORT));
        // set https proxy host empty
        System.setProperty("http.proxyHost", "");
        // set ftp proxy
        System.setProperty("ftp.proxyHost", FTP_PROXY_HOST);
        System.setProperty("ftp.proxyPort", String.valueOf(FTP_PROXY_PORT));
        // set socks proxy
        System.setProperty("socksProxyHost", SOCKS_PROXY_HOST);
        System.setProperty("socksProxyPort", String.valueOf(SOCKS_PROXY_PORT));

        proxyList = selector.select(httpsUri);
        assertProxyEquals(proxyList,Proxy.Type.SOCKS,SOCKS_PROXY_HOST,SOCKS_PROXY_PORT);
    }

    /**
     * @tests java.net.ProxySelector#select(URI)
     */
    @TestTargetNew(
        level = TestLevel.PARTIAL_COMPLETE,
        notes = "This is a complete subset of tests for select method.",
        method = "select",
        args = {java.net.URI.class}
    )
    public void test_selectLjava_net_URI_SelectNoHTTPS()
            throws URISyntaxException {
        // set https proxy
        System.setProperty("http.proxyHost", HTTP_PROXY_HOST);
        System.setProperty("http.proxyPort", String.valueOf(HTTP_PROXY_PORT));
        // set ftp proxy
        System.setProperty("ftp.proxyHost", FTP_PROXY_HOST);
        System.setProperty("ftp.proxyPort", String.valueOf(FTP_PROXY_PORT));

        proxyList = selector.select(httpsUri);
        assertProxyEquals(proxyList,Proxy.NO_PROXY);
    }

    /**
     * @tests java.net.ProxySelector#select(URI)
     */
    @TestTargetNew(
        level = TestLevel.PARTIAL_COMPLETE,
        notes = "This is a complete subset of tests for select method.",
        method = "select",
        args = {java.net.URI.class}
    )
    public void test_selectLjava_net_URI_SelectLikeFTP()
            throws URISyntaxException {
        // set http proxy
        System.setProperty("http.proxyHost", HTTP_PROXY_HOST);
        System.setProperty("http.proxyPort", String.valueOf(HTTP_PROXY_PORT));
        // set ftp host empty
        System.setProperty("ftp.proxyHost", "");
        // set https proxy
        System.setProperty("https.proxyHost", HTTPS_PROXY_HOST);
        System.setProperty("https.proxyPort", String.valueOf(HTTPS_PROXY_PORT));
        // set socks proxy
        System.setProperty("socksProxyHost", SOCKS_PROXY_HOST);
        System.setProperty("socksProxyPort", String.valueOf(SOCKS_PROXY_PORT));

        proxyList = selector.select(ftpUri);
        assertProxyEquals(proxyList,Proxy.Type.SOCKS,SOCKS_PROXY_HOST,SOCKS_PROXY_PORT);
    }

    /**
     * @tests java.net.ProxySelector#select(URI)
     */
    @TestTargetNew(
        level = TestLevel.PARTIAL_COMPLETE,
        notes = "This is a complete subset of tests for select method.",
        method = "select",
        args = {java.net.URI.class}
    )
    public void test_selectLjava_net_URI_SelectNoFTP()
            throws URISyntaxException {
        // set http proxy
        System.setProperty("http.proxyHost", HTTP_PROXY_HOST);
        System.setProperty("http.proxyPort", String.valueOf(HTTP_PROXY_PORT));
        // set https proxy
        System.setProperty("https.proxyHost", HTTPS_PROXY_HOST);
        System.setProperty("https.proxyPort", String.valueOf(HTTPS_PROXY_PORT));

        proxyList = selector.select(ftpUri);
        assertProxyEquals(proxyList,Proxy.NO_PROXY);
    }

    /**
     * @tests java.net.ProxySelector#select(URI)
     */
    @TestTargetNew(
        level = TestLevel.PARTIAL_COMPLETE,
        notes = "This is a complete subset of tests for select method.",
        method = "select",
        args = {java.net.URI.class}
    )
    public void test_selectLjava_net_URI_SelectNoSOCKS()
            throws URISyntaxException {
        // set http proxy
        System.setProperty("http.proxyHost", HTTP_PROXY_HOST);
        System.setProperty("http.proxyPort", String.valueOf(HTTP_PROXY_PORT));
        // set https proxy
        System.setProperty("https.proxyHost", HTTPS_PROXY_HOST);
        System.setProperty("https.proxyPort", String.valueOf(HTTPS_PROXY_PORT));
        // set socks proxy
        System.setProperty("ftp.proxyHost", FTP_PROXY_HOST);
        System.setProperty("ftp.proxyPort", String.valueOf(FTP_PROXY_PORT));

        proxyList = selector.select(tcpUri);
        assertProxyEquals(proxyList,Proxy.NO_PROXY);
    }

    /**
     * @tests java.net.ProxySelector#select(URI)
     */
    @TestTargetNew(
        level = TestLevel.PARTIAL_COMPLETE,
        notes = "This is a complete subset of tests for connectFailed method.",
        method = "connectFailed",
        args = {java.net.URI.class, java.net.SocketAddress.class, java.io.IOException.class}
    )
    public void test_connectionFailedLjava_net_URILjava_net_SocketAddressLjava_io_IOException()
            throws URISyntaxException {
        // set http proxy
        System.setProperty("http.proxyHost", HTTP_PROXY_HOST);
        System.setProperty("http.proxyPort", String.valueOf(HTTP_PROXY_PORT));
        // set https proxy
        System.setProperty("https.proxyHost", HTTPS_PROXY_HOST);
        System.setProperty("https.proxyPort", String.valueOf(HTTPS_PROXY_PORT));
        // set ftp proxy
        System.setProperty("ftp.proxyHost", FTP_PROXY_HOST);
        System.setProperty("ftp.proxyPort", String.valueOf(FTP_PROXY_PORT));
        // set socks proxy
        System.setProperty("socksProxyHost", SOCKS_PROXY_HOST);
        System.setProperty("socksProxyPort", String.valueOf(SOCKS_PROXY_PORT));

        List proxyList1 = selector.select(httpUri);
        assertNotNull(proxyList1);
        assertEquals(1, proxyList1.size());
        Proxy proxy1 = (Proxy) proxyList1.get(0);
        selector
                .connectFailed(httpUri, proxy1.address(), new SocketException());

        List proxyList2 = selector.select(httpUri);
        assertNotNull(proxyList2);
        assertEquals(1, proxyList2.size());
        Proxy proxy2 = (Proxy) proxyList2.get(0);
        // Default implemention doesn't change the proxy list
        assertEquals(proxy1, proxy2);
    }

    /**
     * @tests java.net.ProxySelector#select(URI)
     */
    @TestTargetNew(
        level = TestLevel.PARTIAL_COMPLETE,
        notes = "This is a complete subset of tests for connectFailed method.",
        method = "connectFailed",
        args = {java.net.URI.class, java.net.SocketAddress.class, java.io.IOException.class}
    )
    public void test_connectionFailedLjava_net_URILjava_net_SocketAddressLjava_io_IOException_IllegalArguement()
            throws URISyntaxException {
        SocketAddress sa = InetSocketAddress.createUnresolved("127.0.0.1", 0);
        try {
            selector.connectFailed(null, sa, new SocketException());
            fail("should throw IllegalArgumentException if any argument is null.");
        } catch (IllegalArgumentException e) {
            // expected
        }
        try {
            selector.connectFailed(httpUri, null, new SocketException());
            fail("should throw IllegalArgumentException if any argument is null.");
        } catch (IllegalArgumentException e) {
            // expected
        }
        try {
            selector.connectFailed(httpUri, sa, null);
            fail("should throw IllegalArgumentException if any argument is null.");
        } catch (IllegalArgumentException e) {
            // expected
        }

    }

    /**
     * @tests java.net.ProxySelector#select(URI)
     */
    @TestTargetNew(
        level = TestLevel.PARTIAL_COMPLETE,
        notes = "This is a complete subset of tests for select method.",
        method = "select",
        args = {java.net.URI.class}
    )
    public void test_selectLjava_net_URI_IllegalArgument()
            throws URISyntaxException {
        URI[] illegalUris = { new URI("abc"), new URI("http"), null };
        for (int i = 0; i < illegalUris.length; i++) {
            try {
                selector.select(illegalUris[i]);
                fail("should throw IllegalArgumentException");
            } catch (IllegalArgumentException e) {
                // expected
            }
        }
    }

    /*
     * asserts whether selectedProxyList contains one and only one element,
     * and the element equals proxy.
     */
    private void assertProxyEquals(List selectedProxyList, Proxy proxy) {
        assertNotNull(selectedProxyList);
        assertEquals(1, selectedProxyList.size());
        assertEquals((Proxy) selectedProxyList.get(0), proxy);
    }
    
    /*
     * asserts whether selectedProxyList contains one and only one element,
     * and the element equals proxy which is represented by arguments "type",
     * "host","port".
     */
    private void assertProxyEquals(List selectedProxyList, Proxy.Type type,
            String host, int port) {
        SocketAddress sa = InetSocketAddress.createUnresolved(host, port);
        Proxy proxy = new Proxy(type, sa);
        assertProxyEquals(selectedProxyList, proxy);
    }
    
    /*
     * Mock selector for setDefault test
     */
    static class MockProxySelector extends ProxySelector {

        public void connectFailed(URI uri, SocketAddress sa, IOException ioe) {

        }

        public List <Proxy> select(URI uri) {
            return null;
        }
    }

    /*
     * MockSecurityMaanger. It denies NetPermission("getProxySelector") and
     * NetPermission("setProxySelector").
     */
    class MockSecurityManager extends SecurityManager {
        public void checkPermission(Permission permission) {
            if (permission instanceof NetPermission) {
                if ("getProxySelector".equals(permission.getName())) {
                    throw new SecurityException();
                }
            }

            if (permission instanceof NetPermission) {
                if ("setProxySelector".equals(permission.getName())) {
                    throw new SecurityException();
                }
            }

            if (permission instanceof RuntimePermission) {
                if ("setSecurityManager".equals(permission.getName())) {
                    return;
                }
            }
        }
    }

    /*
     * @see junit.framework.TestCase#setUp()
     */
    protected void setUp() throws Exception {
        super.setUp();
        TestEnvironment.reset();
    }

    /*
     * @see junit.framework.TestCase#tearDown()
     */
    protected void tearDown() throws Exception {
        TestEnvironment.reset();
        super.tearDown();
    }
}