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// DnsTest.cs - NUnit Test Cases for the System.Net.Dns class
//
// Author: Mads Pultz (mpultz@diku.dk)
//
// (C) Mads Pultz, 2001
//
// This test assumes the following:
// 1) The following Internet sites exist:
// www.go-mono.com with IP address 129.250.184.233
// info.diku.dk with IP address 130.225.96.4
// 2) The following DNS name does not exist:
// www.hopefullydoesnotexist.dk
//
using NUnit.Framework;
using System;
using System.Net;
using System.Net.Sockets;
using System.Threading;
using System.Collections;
namespace MonoTests.System.Net {
public class DnsTest: TestCase {
private String site1Name = "www.go-mono.com",
site1Dot = "129.250.184.233",
site2Name = "info.diku.dk",
site2Dot = "130.225.96.4",
noneExistingSite = "www.hopefullydoesnotexist.dk";
private uint site1IP = 2180692201, site2IP = 2195808260; // Big-Endian
public DnsTest(): base("MonoTests.System.Net.DnsTest testsuite") { }
public DnsTest(String name): base(name) { }
public static ITest Suite {
get { return new TestSuite(typeof(DnsTest)); }
}
private void Callback(IAsyncResult ar) {
IPHostEntry h;
h = Dns.EndGetHostByName(ar);
SubTestValidIPHostEntry(h);
}
public void TestAsyncGetHostByName(){
IAsyncResult r;
r = Dns.BeginGetHostByName(site1Name, new AsyncCallback(Callback), null);
IAsyncResult async = Dns.BeginGetHostByName (site1Name, null, null);
IPHostEntry entry = Dns.EndGetHostByName (async);
SubTestValidIPHostEntry(entry);
AssertEquals ("#1", "www.go-mono.com", entry.HostName);
}
public void TestAsyncResolve() {
IAsyncResult r;
r = Dns.BeginResolve(site1Name, new AsyncCallback(Callback), null);
IAsyncResult async = Dns.BeginResolve (site1Dot, null, null);
IPHostEntry entry = Dns.EndResolve (async);
SubTestValidIPHostEntry(entry);
AssertEquals ("#1", "129.250.184.233", entry.HostName);
}
public void TestGetHostName() {
string hostName = Dns.GetHostName();
Assert(hostName != null);
}
private void SubTestGetHostByName(string siteName, string siteDot) {
IPHostEntry h = Dns.GetHostByName(siteName);
SubTestValidIPHostEntry(h);
Assert(h.HostName.Equals(siteName));
Assert(h.AddressList[0].ToString() == siteDot);
}
public void TestGetHostByName() {
SubTestGetHostByName(site1Name, site1Dot);
SubTestGetHostByName(site2Name, site2Dot);
try {
Dns.GetHostByName(noneExistingSite);
Fail("Should raise a SocketException (assuming that '" + noneExistingSite + "' does not exist)");
} catch (SocketException) {
}
try {
Dns.GetHostByName(null);
Fail("Should raise an ArgumentNullException");
} catch (ArgumentNullException) {
}
}
private void SubTestGetHostByAddressStringFormatException(string addr) {
try {
Dns.GetHostByAddress(addr);
Fail("Should raise a FormatException");
} catch (FormatException) {
}
}
private void SubTestGetHostByAddressString(string addr) {
IPHostEntry h = Dns.GetHostByAddress(addr);
SubTestValidIPHostEntry(h);
}
public void TestGetHostByAddressString() {
try {
String addr = null;
Dns.GetHostByAddress(addr);
Fail("Should raise an ArgumentNullException");
} catch (ArgumentNullException) {
}
SubTestGetHostByAddressStringFormatException("123.255.23");
SubTestGetHostByAddressStringFormatException("123.256.34.10");
SubTestGetHostByAddressStringFormatException("not an IP address");
SubTestGetHostByAddressString(site1Dot);
SubTestGetHostByAddressString(site2Dot);
}
private void SubTestGetHostByAddressIPAddress(IPAddress addr) {
IPHostEntry h = Dns.GetHostByAddress(addr);
SubTestValidIPHostEntry(h);
Assert(h.AddressList[0].ToString() == addr.ToString());
}
public void TestGetHostByAddressIPAddress() {
try {
IPAddress addr = null;
Dns.GetHostByAddress(addr);
Fail("Should raise an ArgumentNullException");
} catch (ArgumentNullException) {
}
SubTestGetHostByAddressIPAddress(new IPAddress(IPAddress.NetworkToHostOrder((int)site1IP)));
SubTestGetHostByAddressIPAddress(new IPAddress(IPAddress.NetworkToHostOrder((int)site2IP)));
}
private void SubTestResolve(string addr) {
IPHostEntry h = Dns.Resolve(addr);
SubTestValidIPHostEntry(h);
}
public void TestResolve() {
SubTestResolve(site1Name);
SubTestResolve(site2Name);
SubTestResolve(site1Dot);
SubTestResolve(site2Dot);
}
private void SubTestValidIPHostEntry(IPHostEntry h) {
Assert(h.HostName != null);
Assert(h.AddressList != null);
Assert(h.AddressList.Length > 0);
}
private static void printIPHostEntry(IPHostEntry h)
{
Console.WriteLine("----------------------------------------------------");
Console.WriteLine("Host name:");
Console.WriteLine(h.HostName);
Console.WriteLine("IP addresses:");
IPAddress[] list = h.AddressList;
for(int i = 0; i < list.Length; ++i)
Console.WriteLine(list[i]);
Console.WriteLine("Aliases:");
string[] aliases = h.Aliases;
for(int i = 0; i < aliases.Length; ++i)
Console.WriteLine(aliases[i]);
Console.WriteLine("----------------------------------------------------");
}
}
}
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