mcs/class/System/Test/System.Net/DnsTest.cs

   1 // DnsTest.cs - NUnit Test Cases for the System.Net.Dns class\r
   2 //\r
   3 // Authors: \r
   4 //   Mads Pultz (mpultz@diku.dk)\r
   5 //   Martin Willemoes Hansen (mwh@sysrq.dk)\r
   6 //\r
   7 // (C) 2001 Mads Pultz\r
   8 // (C) 2003 Martin Willemoes Hansen\r
   9 // \r
  10 // This test assumes the following:\r
  11 // 1) The following Internet sites exist:\r
  12 //        www.go-mono.com with IP address 64.14.94.188\r
  13 //        info.diku.dk with IP address 130.225.96.4\r
  14 // 2) The following DNS name does not exist:\r
  15 //        www.hopefullydoesnotexist.dk\r
  16 //\r
  17 \r
  18 using System;\r
  19 using System.Collections;\r
  20 using System.Net;\r
  21 using System.Net.Sockets;\r
  22 using System.Threading;\r
  23 \r
  24 using NUnit.Framework;\r
  25 \r
  26 namespace MonoTests.System.Net\r
  27 {\r
  28         [TestFixture]\r
  29         public class DnsTest\r
  30         {\r
  31                 private String site1Name = "www.go-mono.com",\r
  32                         site1Dot = "130.57.21.18",\r
  33                         site2Name = "info.diku.dk",\r
  34                         site2Dot = "130.225.96.4",\r
  35                         noneExistingSite = "www.unlikely.novell.com";\r
  36                 private uint site1IP = 2180692201, site2IP = 2195808260; // Big-Endian\r
  37 \r
  38                 [Test]\r
  39                 public void AsyncGetHostByName ()\r
  40                 {\r
  41                         IAsyncResult r;\r
  42                         r = Dns.BeginGetHostByName (site1Name, new AsyncCallback (GetHostByNameCallback), null);\r
  43 \r
  44                         IAsyncResult async = Dns.BeginGetHostByName (site1Name, null, null);\r
  45                         IPHostEntry entry = Dns.EndGetHostByName (async);\r
  46                         SubTestValidIPHostEntry (entry);\r
  47                         Assert.AreEqual ("www.go-mono.com", entry.HostName);\r
  48                 }\r
  49 \r
  50                 void GetHostByNameCallback (IAsyncResult ar)\r
  51                 {\r
  52                         IPHostEntry h;\r
  53                         h = Dns.EndGetHostByName (ar);\r
  54                         SubTestValidIPHostEntry (h);\r
  55                 }\r
  56 \r
  57                 [Test]\r
  58                 public void AsyncResolve ()\r
  59                 {\r
  60                         IAsyncResult r;\r
  61                         r = Dns.BeginResolve (site1Name, new AsyncCallback (ResolveCallback), null);\r
  62 \r
  63                         IAsyncResult async = Dns.BeginResolve (site1Dot, null, null);\r
  64                         IPHostEntry entry = Dns.EndResolve (async);\r
  65                         SubTestValidIPHostEntry (entry);\r
  66                         Assert.AreEqual (site1Dot, entry.AddressList [0].ToString ());\r
  67                 }\r
  68 \r
  69                 void ResolveCallback (IAsyncResult ar)\r
  70                 {\r
  71                         IPHostEntry h = Dns.EndResolve (ar);\r
  72                         SubTestValidIPHostEntry (h);\r
  73                 }\r
  74 \r
  75 #if NET_2_0\r
  76                 [Test]\r
  77                 public void BeginGetHostAddresses_HostNameOrAddress_Null ()\r
  78                 {\r
  79                         try {\r
  80                                 Dns.BeginGetHostAddresses (\r
  81                                         (string) null,\r
  82                                         new AsyncCallback (GetHostAddressesCallback),\r
  83                                         null);\r
  84                                 Assert.Fail ("#1");\r
  85                         } catch (ArgumentNullException ex) {\r
  86                                 Assert.AreEqual (typeof (ArgumentNullException), ex.GetType (), "#2");\r
  87                                 Assert.IsNull (ex.InnerException, "#3");\r
  88                                 Assert.IsNotNull (ex.Message, "#4");\r
  89                                 Assert.AreEqual ("hostName", ex.ParamName, "#5");\r
  90                         }\r
  91                 }\r
  92 \r
  93                 [Test]\r
  94                 public void BeginGetHostAddresses_HostNameOrAddress_UnspecifiedAddress ()\r
  95                 {\r
  96                         // IPv4\r
  97                         try {\r
  98                                 Dns.BeginGetHostAddresses (\r
  99                                         "0.0.0.0",\r
 100                                         new AsyncCallback (GetHostAddressesCallback),\r
 101                                         null);\r
 102                                 Assert.Fail ("#A1");\r
 103                         } catch (ArgumentException ex) {\r
 104                                 // IPv4 address 0.0.0.0 and IPv6 address ::0 are\r
 105                                 // unspecified addresses that cannot be used as\r
 106                                 // a target address\r
 107                                 Assert.AreEqual (typeof (ArgumentException), ex.GetType (), "#A2");\r
 108                                 Assert.IsNull (ex.InnerException, "#A3");\r
 109                                 Assert.IsNotNull (ex.Message, "#A4");\r
 110                                 Assert.AreEqual ("hostNameOrAddress", ex.ParamName, "#A5");\r
 111                         }\r
 112 \r
 113                         // IPv6\r
 114                         try {\r
 115                                 Dns.BeginGetHostAddresses (\r
 116                                         "::0",\r
 117                                         new AsyncCallback (GetHostAddressesCallback),\r
 118                                         null);\r
 119                                 Assert.Fail ("#B1");\r
 120                         } catch (ArgumentException ex) {\r
 121                                 // IPv4 address 0.0.0.0 and IPv6 address ::0 are\r
 122                                 // unspecified addresses that cannot be used as\r
 123                                 // a target address\r
 124                                 Assert.AreEqual (typeof (ArgumentException), ex.GetType (), "#B2");\r
 125                                 Assert.IsNull (ex.InnerException, "#B3");\r
 126                                 Assert.IsNotNull (ex.Message, "#B4");\r
 127                                 Assert.AreEqual ("hostNameOrAddress", ex.ParamName, "#B5");\r
 128                         }\r
 129                 }\r
 130 \r
 131                 void GetHostAddressesCallback (IAsyncResult ar)\r
 132                 {\r
 133                         IPAddress [] addresses = Dns.EndGetHostAddresses (ar);\r
 134                         Assert.IsNotNull (addresses);\r
 135                 }\r
 136 \r
 137                 [Test]\r
 138                 public void GetHostAddresses_HostNameOrAddress_Null ()\r
 139                 {\r
 140                         try {\r
 141                                 Dns.GetHostAddresses ((string) null);\r
 142                                 Assert.Fail ("#1");\r
 143                         } catch (ArgumentNullException ex) {\r
 144                                 Assert.AreEqual (typeof (ArgumentNullException), ex.GetType (), "#2");\r
 145                                 Assert.IsNull (ex.InnerException, "#3");\r
 146                                 Assert.IsNotNull (ex.Message, "#4");\r
 147                                 Assert.AreEqual ("hostNameOrAddress", ex.ParamName, "#5");\r
 148                         }\r
 149                 }\r
 150 \r
 151                 [Test]\r
 152                 public void GetHostAddresses_HostNameOrAddress_UnspecifiedAddress ()\r
 153                 {\r
 154                         // IPv4\r
 155                         try {\r
 156                                 Dns.GetHostAddresses ("0.0.0.0");\r
 157                                 Assert.Fail ("#A1");\r
 158                         } catch (ArgumentException ex) {\r
 159                                 // IPv4 address 0.0.0.0 and IPv6 address ::0 are\r
 160                                 // unspecified addresses that cannot be used as\r
 161                                 // a target address\r
 162                                 Assert.AreEqual (typeof (ArgumentException), ex.GetType (), "#A2");\r
 163                                 Assert.IsNull (ex.InnerException, "#A3");\r
 164                                 Assert.IsNotNull (ex.Message, "#A4");\r
 165                                 Assert.AreEqual ("hostNameOrAddress", ex.ParamName, "#A5");\r
 166                         }\r
 167 \r
 168                         // IPv6\r
 169                         try {\r
 170                                 Dns.GetHostAddresses ("::0");\r
 171                                 Assert.Fail ("#B1");\r
 172                         } catch (ArgumentException ex) {\r
 173                                 // IPv4 address 0.0.0.0 and IPv6 address ::0 are\r
 174                                 // unspecified addresses that cannot be used as\r
 175                                 // a target address\r
 176                                 Assert.AreEqual (typeof (ArgumentException), ex.GetType (), "#B2");\r
 177                                 Assert.IsNull (ex.InnerException, "#B3");\r
 178                                 Assert.IsNotNull (ex.Message, "#B4");\r
 179                                 Assert.AreEqual ("hostNameOrAddress", ex.ParamName, "#B5");\r
 180                         }\r
 181                 }\r
 182 #endif\r
 183 \r
 184                 [Test]\r
 185                 public void GetHostName ()\r
 186                 {\r
 187                         string hostName = Dns.GetHostName ();\r
 188                         Assert.IsNotNull (hostName);\r
 189                 }\r
 190 \r
 191                 [Test]\r
 192                 public void GetHostByName ()\r
 193                 {\r
 194                         SubTestGetHostByName (site1Name, site1Dot);\r
 195                         SubTestGetHostByName (site2Name, site2Dot);\r
 196                         try {\r
 197                                 Dns.GetHostByName (noneExistingSite);\r
 198                                 Assert.Fail ("Should raise a SocketException (assuming that '" + noneExistingSite + "' does not exist)");\r
 199                         } catch (SocketException) {\r
 200                         }\r
 201                 }\r
 202 \r
 203                 void SubTestGetHostByName (string siteName, string siteDot)\r
 204                 {\r
 205                         IPHostEntry h = Dns.GetHostByName (siteName);\r
 206                         SubTestValidIPHostEntry (h);\r
 207                         Assert.AreEqual (siteName, h.HostName, "siteName");\r
 208                         Assert.AreEqual (siteDot, h.AddressList [0].ToString (), "siteDot");\r
 209                 }\r
 210 \r
 211                 [Test]\r
 212                 public void GetHostByName_HostName_Null ()\r
 213                 {\r
 214                         try {\r
 215                                 Dns.GetHostByName ((string) null);\r
 216                                 Assert.Fail ("#1");\r
 217                         } catch (ArgumentNullException ex) {\r
 218                                 Assert.AreEqual (typeof (ArgumentNullException), ex.GetType (), "#2");\r
 219                                 Assert.IsNull (ex.InnerException, "#3");\r
 220                                 Assert.IsNotNull (ex.Message, "#4");\r
 221                                 Assert.AreEqual ("hostName", ex.ParamName, "#5");\r
 222                         }\r
 223                 }\r
 224 \r
 225                 [Test]\r
 226                 public void GetHostByAddressString_Address_Null ()\r
 227                 {\r
 228                         try {\r
 229                                 Dns.GetHostByAddress ((string) null);\r
 230                                 Assert.Fail ("#1");\r
 231                         } catch (ArgumentNullException ex) {\r
 232                                 Assert.AreEqual (typeof (ArgumentNullException), ex.GetType (), "#2");\r
 233                                 Assert.IsNull (ex.InnerException, "#3");\r
 234                                 Assert.IsNotNull (ex.Message, "#4");\r
 235                                 Assert.AreEqual ("address", ex.ParamName, "#5");\r
 236                         }\r
 237                 }\r
 238 \r
 239                 [Test]\r
 240                 [ExpectedException (typeof (SocketException))]\r
 241 #if TARGET_JVM\r
 242                 [Ignore ("Ignore failures in Sys.Net")]\r
 243 #endif\r
 244                 public void GetHostByAddressString2 ()\r
 245                 {\r
 246                         Dns.GetHostByAddress ("123.255.23");\r
 247                 }\r
 248 \r
 249                 [Test]\r
 250                 [ExpectedException (typeof (FormatException))]\r
 251                 public void GetHostByAddressString3 ()\r
 252                 {\r
 253                         Dns.GetHostByAddress ("123.256.34.10");\r
 254                 }\r
 255 \r
 256                 [Test, ExpectedException (typeof (FormatException))]\r
 257                 public void GetHostByAddressString4 ()\r
 258                 {\r
 259                         Dns.GetHostByAddress ("not an IP address");\r
 260                 }\r
 261 \r
 262                 [Test]\r
 263 /*** Current go-mono.com IP works fine here***\r
 264 #if ONLY_1_1\r
 265                 [ExpectedException (typeof (SocketException))]\r
 266 #endif\r
 267 ********/\r
 268                 public void GetHostByAddressString5 ()\r
 269                 {\r
 270                         Dns.GetHostByAddress (site1Dot);\r
 271                 }\r
 272 \r
 273                 [Test]\r
 274                 public void GetHostByAddressIPAddress_Address_Null ()\r
 275                 {\r
 276                         try {\r
 277                                 Dns.GetHostByAddress ((IPAddress) null);\r
 278                                 Assert.Fail ("#1");\r
 279                         } catch (ArgumentNullException ex) {\r
 280                                 Assert.AreEqual (typeof (ArgumentNullException), ex.GetType (), "#2");\r
 281                                 Assert.IsNull (ex.InnerException, "#3");\r
 282                                 Assert.IsNotNull (ex.Message, "#4");\r
 283                                 Assert.AreEqual ("address", ex.ParamName, "#5");\r
 284                         }\r
 285                 }\r
 286 \r
 287                 [Test]\r
 288                 [Ignore ("Fails on both Mono and MS")]\r
 289                 public void GetHostByAddressIPAddress2 ()\r
 290                 {\r
 291                         IPAddress addr = new IPAddress (IPAddress.NetworkToHostOrder ((int) site1IP));\r
 292                         IPHostEntry h = Dns.GetHostByAddress (addr);\r
 293                         SubTestValidIPHostEntry (h);\r
 294                         Assert.AreEqual (addr.ToString (), h.AddressList [0].ToString ());\r
 295                 }\r
 296 \r
 297                 [Test]\r
 298                 public void GetHostByAddressIPAddress3 ()\r
 299                 {\r
 300                         IPAddress addr = new IPAddress (IPAddress.NetworkToHostOrder ((int) site2IP));\r
 301                         IPHostEntry h = Dns.GetHostByAddress (addr);\r
 302                         SubTestValidIPHostEntry (h);\r
 303                         Assert.AreEqual (addr.ToString (), h.AddressList [0].ToString ());\r
 304                 }\r
 305 \r
 306                 [Test]\r
 307                 public void BeginResolve_HostName_Null ()\r
 308                 {\r
 309                         try {\r
 310                                 Dns.BeginResolve ((string) null,\r
 311                                         new AsyncCallback (ResolveCallback),\r
 312                                         null);\r
 313                                 Assert.Fail ("#1");\r
 314                         } catch (ArgumentNullException ex) {\r
 315                                 Assert.AreEqual (typeof (ArgumentNullException), ex.GetType (), "#2");\r
 316                                 Assert.IsNull (ex.InnerException, "#3");\r
 317                                 Assert.IsNotNull (ex.Message, "#4");\r
 318                                 Assert.AreEqual ("hostName", ex.ParamName, "#5");\r
 319                         }\r
 320                 }\r
 321 \r
 322                 [Test]\r
 323                 public void Resolve ()\r
 324                 {\r
 325                         SubTestResolve (site1Name);\r
 326                         SubTestResolve (site2Name);\r
 327                         SubTestResolve (site1Dot);\r
 328                         SubTestResolve (site2Dot);\r
 329                 }\r
 330 \r
 331                 void SubTestResolve (string addr)\r
 332                 {\r
 333                         IPHostEntry h = Dns.Resolve (addr);\r
 334                         SubTestValidIPHostEntry (h);\r
 335                 }\r
 336 \r
 337                 [Test]\r
 338                 public void Resolve_HostName_Null ()\r
 339                 {\r
 340                         try {\r
 341                                 Dns.Resolve ((string) null);\r
 342                                 Assert.Fail ("#1");\r
 343                         } catch (ArgumentNullException ex) {\r
 344                                 Assert.AreEqual (typeof (ArgumentNullException), ex.GetType (), "#2");\r
 345                                 Assert.IsNull (ex.InnerException, "#3");\r
 346                                 Assert.IsNotNull (ex.Message, "#4");\r
 347                                 Assert.AreEqual ("hostName", ex.ParamName, "#5");\r
 348                         }\r
 349                 }\r
 350 \r
 351 #if NET_2_0\r
 352                 [Test] // BeginGetHostEntry (IPAddress, AsyncCallback, Object)\r
 353                 public void BeginGetHostEntry1_Address_Null ()\r
 354                 {\r
 355                         try {\r
 356                                 Dns.BeginGetHostEntry (\r
 357                                         (IPAddress) null,\r
 358                                         new AsyncCallback (GetHostAddressesCallback),\r
 359                                         null);\r
 360                                 Assert.Fail ("#1");\r
 361                         } catch (ArgumentNullException ex) {\r
 362                                 Assert.AreEqual (typeof (ArgumentNullException), ex.GetType (), "#2");\r
 363                                 Assert.IsNull (ex.InnerException, "#3");\r
 364                                 Assert.IsNotNull (ex.Message, "#4");\r
 365                                 Assert.AreEqual ("address", ex.ParamName, "#5");\r
 366                         }\r
 367                 }\r
 368 \r
 369                 [Test] // BeginGetHostEntry (String, AsyncCallback, Object)\r
 370                 public void BeginGetHostEntry2_HostNameOrAddress_Null ()\r
 371                 {\r
 372                         try {\r
 373                                 Dns.BeginGetHostEntry (\r
 374                                         (string) null,\r
 375                                         new AsyncCallback (GetHostAddressesCallback),\r
 376                                         null);\r
 377                                 Assert.Fail ("#1");\r
 378                         } catch (ArgumentNullException ex) {\r
 379                                 Assert.AreEqual (typeof (ArgumentNullException), ex.GetType (), "#2");\r
 380                                 Assert.IsNull (ex.InnerException, "#3");\r
 381                                 Assert.IsNotNull (ex.Message, "#4");\r
 382                                 Assert.AreEqual ("hostName", ex.ParamName, "#5");\r
 383                         }\r
 384                 }\r
 385 \r
 386                 [Test] // BeginGetHostEntry (String, AsyncCallback, Object)\r
 387                 public void BeginGetHostEntry2_HostNameOrAddress_UnspecifiedAddress ()\r
 388                 {\r
 389                         // IPv4\r
 390                         try {\r
 391                                 Dns.BeginGetHostEntry (\r
 392                                         "0.0.0.0",\r
 393                                         new AsyncCallback (GetHostEntryCallback),\r
 394                                         null);\r
 395                                 Assert.Fail ("#1");\r
 396                         } catch (ArgumentException ex) {\r
 397                                 // IPv4 address 0.0.0.0 and IPv6 address ::0 are\r
 398                                 // unspecified addresses that cannot be used as\r
 399                                 // a target address\r
 400                                 Assert.AreEqual (typeof (ArgumentException), ex.GetType (), "#2");\r
 401                                 Assert.IsNull (ex.InnerException, "#3");\r
 402                                 Assert.IsNotNull (ex.Message, "#4");\r
 403                                 Assert.AreEqual ("hostNameOrAddress", ex.ParamName, "#5");\r
 404                         }\r
 405 \r
 406                         // IPv6\r
 407                         try {\r
 408                                 Dns.BeginGetHostEntry (\r
 409                                         "::0",\r
 410                                         new AsyncCallback (GetHostEntryCallback),\r
 411                                         null);\r
 412                                 Assert.Fail ("#1");\r
 413                         } catch (ArgumentException ex) {\r
 414                                 // IPv4 address 0.0.0.0 and IPv6 address ::0 are\r
 415                                 // unspecified addresses that cannot be used as\r
 416                                 // a target address\r
 417                                 Assert.AreEqual (typeof (ArgumentException), ex.GetType (), "#2");\r
 418                                 Assert.IsNull (ex.InnerException, "#3");\r
 419                                 Assert.IsNotNull (ex.Message, "#4");\r
 420                                 Assert.AreEqual ("hostNameOrAddress", ex.ParamName, "#5");\r
 421                         }\r
 422                 }\r
 423 \r
 424                 void GetHostEntryCallback (IAsyncResult ar)\r
 425                 {\r
 426                         IPHostEntry hostEntry = Dns.EndGetHostEntry (ar);\r
 427                         Assert.IsNotNull (hostEntry);\r
 428                 }\r
 429 \r
 430                 [Test] // GetHostEntry (IPAddress)\r
 431                 public void GetHostEntry1_Address_Null ()\r
 432                 {\r
 433                         try {\r
 434                                 Dns.GetHostEntry ((IPAddress) null);\r
 435                                 Assert.Fail ("#1");\r
 436                         } catch (ArgumentNullException ex) {\r
 437                                 Assert.AreEqual (typeof (ArgumentNullException), ex.GetType (), "#2");\r
 438                                 Assert.IsNull (ex.InnerException, "#3");\r
 439                                 Assert.IsNotNull (ex.Message, "#4");\r
 440                                 Assert.AreEqual ("address", ex.ParamName, "#5");\r
 441                         }\r
 442                 }\r
 443 \r
 444                 [Test] // GetHostEntry (String)\r
 445                 public void GetHostEntry2 ()\r
 446                 {\r
 447                         Dns.GetHostEntry (site1Name); // hostname\r
 448                         Dns.GetHostEntry (site1Dot); // IP address\r
 449                 }\r
 450 \r
 451                 [Test] // GetHostEntry (String)\r
 452                 public void GetHostEntry2_HostNameOrAddress_Null ()\r
 453                 {\r
 454                         try {\r
 455                                 Dns.GetHostEntry ((string) null);\r
 456                                 Assert.Fail ("#1");\r
 457                         } catch (ArgumentNullException ex) {\r
 458                                 Assert.AreEqual (typeof (ArgumentNullException), ex.GetType (), "#2");\r
 459                                 Assert.IsNull (ex.InnerException, "#3");\r
 460                                 Assert.IsNotNull (ex.Message, "#4");\r
 461                                 Assert.AreEqual ("hostNameOrAddress", ex.ParamName, "#5");\r
 462                         }\r
 463                 }\r
 464 \r
 465                 [Test] // GetHostEntry (String)\r
 466                 public void GetHostEntry2_HostNameOrAddress_UnspecifiedAddress ()\r
 467                 {\r
 468                         // IPv4\r
 469                         try {\r
 470                                 Dns.GetHostEntry ("0.0.0.0");\r
 471                                 Assert.Fail ("#A1");\r
 472                         } catch (ArgumentException ex) {\r
 473                                 // IPv4 address 0.0.0.0 and IPv6 address ::0 are\r
 474                                 // unspecified addresses that cannot be used as\r
 475                                 // a target address\r
 476                                 Assert.AreEqual (typeof (ArgumentException), ex.GetType (), "#A2");\r
 477                                 Assert.IsNull (ex.InnerException, "#A3");\r
 478                                 Assert.IsNotNull (ex.Message, "#A4");\r
 479                                 Assert.AreEqual ("hostNameOrAddress", ex.ParamName, "#A5");\r
 480                         }\r
 481 \r
 482                         // IPv6\r
 483                         try {\r
 484                                 Dns.GetHostEntry ("::0");\r
 485                                 Assert.Fail ("#B1");\r
 486                         } catch (ArgumentException ex) {\r
 487                                 // IPv4 address 0.0.0.0 and IPv6 address ::0 are\r
 488                                 // unspecified addresses that cannot be used as\r
 489                                 // a target address\r
 490                                 Assert.AreEqual (typeof (ArgumentException), ex.GetType (), "#B2");\r
 491                                 Assert.IsNull (ex.InnerException, "#B3");\r
 492                                 Assert.IsNotNull (ex.Message, "#B4");\r
 493                                 Assert.AreEqual ("hostNameOrAddress", ex.ParamName, "#B5");\r
 494                         }\r
 495                 }\r
 496 #endif\r
 497 \r
 498                 void SubTestValidIPHostEntry (IPHostEntry h)\r
 499                 {\r
 500                         Assert.IsNotNull (h.HostName, "HostName not null");\r
 501                         Assert.IsNotNull (h.AddressList, "AddressList not null");\r
 502                         Assert.IsTrue (h.AddressList.Length > 0, "AddressList.Length");\r
 503                 }\r
 504 \r
 505                 /* This isn't used anymore, but could be useful for debugging\r
 506                 static void printIPHostEntry(IPHostEntry h)\r
 507                 {\r
 508                         Console.WriteLine("----------------------------------------------------");\r
 509                         Console.WriteLine("Host name:");\r
 510                         Console.WriteLine(h.HostName);\r
 511                         Console.WriteLine("IP addresses:");\r
 512                         IPAddress[] list = h.AddressList;\r
 513                         for(int i = 0; i < list.Length; ++i)\r
 514                                 Console.WriteLine(list[i]);\r
 515                         Console.WriteLine("Aliases:");\r
 516                         string[] aliases = h.Aliases;\r
 517                         for(int i = 0; i < aliases.Length; ++i)\r
 518                                 Console.WriteLine(aliases[i]);\r
 519                         Console.WriteLine("----------------------------------------------------");\r
 520                 }\r
 521                 */\r
 522         }\r
 523 }\r