Android example source code file (LocalSocketTest.java)

This example Android source code file (LocalSocketTest.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, arrayindexoutofboundsexception, credentials, filedescriptor, internet, io, ioexception, localserversocket, localsocket, localsocketaddress, localsockettest, net, network, smalltest, test, testcase

The LocalSocketTest.java Android example source code

/*
 * Copyright (C) 2007 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.net;

import android.net.Credentials;
import android.net.LocalServerSocket;
import android.net.LocalSocket;
import android.net.LocalSocketAddress;
import android.test.MoreAsserts;
import android.test.suitebuilder.annotation.SmallTest;
import junit.framework.TestCase;

import java.io.FileDescriptor;
import java.io.IOException;

public class LocalSocketTest extends TestCase {

    @SmallTest
    public void testBasic() throws Exception {
        LocalServerSocket ss;
        LocalSocket ls;
        LocalSocket ls1;

        ss = new LocalServerSocket("android.net.LocalSocketTest");

        ls = new LocalSocket();

        ls.connect(new LocalSocketAddress("android.net.LocalSocketTest"));

        ls1 = ss.accept();

        // Test trivial read and write
        ls.getOutputStream().write(42);

        assertEquals(42, ls1.getInputStream().read());

        // Test getting credentials
        Credentials c = ls1.getPeerCredentials();

        MoreAsserts.assertNotEqual(0, c.getPid());

        // Test sending and receiving file descriptors
        ls.setFileDescriptorsForSend(
                new FileDescriptor[]{FileDescriptor.in});

        ls.getOutputStream().write(42);

        assertEquals(42, ls1.getInputStream().read());

        FileDescriptor[] out = ls1.getAncillaryFileDescriptors();

        assertEquals(1, out.length);

        // Test multible byte write and available()
        ls1.getOutputStream().write(new byte[]{0, 1, 2, 3, 4, 5}, 1, 5);

        assertEquals(1, ls.getInputStream().read());
        assertEquals(4, ls.getInputStream().available());

        byte[] buffer = new byte[16];
        int countRead;

        countRead = ls.getInputStream().read(buffer, 1, 15);

        assertEquals(4, countRead);
        assertEquals(2, buffer[1]);
        assertEquals(3, buffer[2]);
        assertEquals(4, buffer[3]);
        assertEquals(5, buffer[4]);

        // Try various array-out-of-bound cases
        try {
            ls.getInputStream().read(buffer, 1, 16);
            fail("expected exception");
        } catch (ArrayIndexOutOfBoundsException ex) {
            // excpected
        }

        try {
            ls.getOutputStream().write(buffer, 1, 16);
            fail("expected exception");
        } catch (ArrayIndexOutOfBoundsException ex) {
            // excpected
        }

        try {
            ls.getOutputStream().write(buffer, -1, 15);
            fail("expected exception");
        } catch (ArrayIndexOutOfBoundsException ex) {
            // excpected
        }

        try {
            ls.getOutputStream().write(buffer, 0, -1);
            fail("expected exception");
        } catch (ArrayIndexOutOfBoundsException ex) {
            // excpected
        }

        try {
            ls.getInputStream().read(buffer, -1, 15);
            fail("expected exception");
        } catch (ArrayIndexOutOfBoundsException ex) {
            // excpected
        }

        try {
            ls.getInputStream().read(buffer, 0, -1);
            fail("expected exception");
        } catch (ArrayIndexOutOfBoundsException ex) {
            // excpected
        }

        // Try read of length 0
        ls.getOutputStream().write(42);
        countRead = ls1.getInputStream().read(buffer, 0, 0);
        assertEquals(0, countRead);
        assertEquals(42, ls1.getInputStream().read());

        ss.close();

        ls.close();

        // Try write on closed socket

        try {
            ls.getOutputStream().write(42);
            fail("expected exception");
        } catch (IOException ex) {
            // Expected
        }

        // Try read on closed socket

        try {
            ls.getInputStream().read();
            fail("expected exception");
        } catch (IOException ex) {
            // Expected
        }

        // Try write on socket whose peer has closed

        try {
            ls1.getOutputStream().write(42);
            fail("expected exception");
        } catch (IOException ex) {
            // Expected
        }

        // Try read on socket whose peer has closed

        assertEquals(-1, ls1.getInputStream().read());

        ls1.close();
    }
}