Android example source code file (InetAddrTest.java)

This example Android source code file (InetAddrTest.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Android by Example" ^TM.

Java - Android tags/keywords

android, hosts, inetaddress, inetaddrtest, interruptedexception, net, network, not, random, string, suppress, test, testcase, unknownhostexception, util

The InetAddrTest.java Android example source code

/*
 * Copyright (C) 2008 The Android Open Source Project
 *
 * Licensed 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 android.core;

import junit.framework.TestCase;

import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.Random;

import android.test.suitebuilder.annotation.Suppress;

/**
 * Tests InetAddr class by checking methods to resolve domains to IP addresses
 * and by checking if the class returns correct addresses for local host address
 * and host name.
 */
@Suppress
public class InetAddrTest extends TestCase {
    private static final String[] HOSTS = {
            "localhost", "www.google.com", "www.slashdot.org", "www.wikipedia.org",
            "www.paypal.com", "www.cnn.com", "www.yahoo.com", "www.amazon.com",
            "www.ebay.com", "www.android.com"
    };

    public void testInetAddr() throws Exception {
        byte[] raw;

        InetAddress ia = InetAddress.getByName("localhost");

        raw = ia.getAddress();

        assertEquals(127, raw[0]);
        assertEquals(0, raw[1]);
        assertEquals(0, raw[2]);
        assertEquals(1, raw[3]);

        ia = InetAddress.getByName("127.0.0.1");

        raw = ia.getAddress();

        assertEquals(127, raw[0]);
        assertEquals(0, raw[1]);
        assertEquals(0, raw[2]);
        assertEquals(1, raw[3]);

        ia = InetAddress.getByName(null);

        try {
            InetAddress.getByName(".0.0.1");
            fail("expected ex");
        } catch (UnknownHostException ex) {
            // expected
        }

        try {
            InetAddress.getByName("thereisagoodchancethisdomaindoesnotexist.weirdtld");
            fail("expected ex");
        } catch (UnknownHostException ex) {
            // expected
        }

        try {
            InetAddress.getByName("127.0.0.");
            fail("expected ex");
        } catch (UnknownHostException ex) {
            // expected
        }

        Random random = new Random();
        int count = 0;
        for (int i = 0; i < 100; i++) {
            int index = random.nextInt(HOSTS.length);
            try {
                InetAddress.getByName(HOSTS[index]);
                count++;
                try {
                    Thread.sleep(50);
                } catch (InterruptedException ex) {
                }
            } catch (UnknownHostException ex) {
            }
        }
        assertEquals("Not all host lookups succeeded", 100, count);
    }
}