mcs/class/corlib/Test/System/EnumTest.cs

   1 // EnumTest.cs - NUnit Test Cases for the System.Enum class
   2 //
   3 // David Brandt (bucky@keystreams.com)
   4 //
   5 // (C) Ximian, Inc.  http://www.ximian.com
   6 //
   7
   8 using NUnit.Framework;
   9 using System;
  10 using System.IO;
  11 using System.Reflection;
  12
  13
  14 namespace MonoTests.System
  15 {
  16
  17 public class EnumTest : TestCase
  18 {
  19         public EnumTest() {}
  20
  21         protected override void SetUp()
  22         {
  23         }
  24
  25         protected override void TearDown()
  26         {
  27         }
  28
  29         enum TestingEnum {This, Is, A, Test};
  30         enum TestingEnum2 {This, Is, A, Test};
  31         enum TestingEnum3: ulong {This, Is, A, Test = ulong.MaxValue };
  32
  33         public void TestCompareTo() {
  34                 Enum e1 = new TestingEnum();
  35                 Enum e2 = new TestingEnum();
  36                 Enum e3 = new TestingEnum2();
  37
  38                 AssertEquals("An enum should equal itself",
  39                              0, e1.CompareTo(e1));
  40                 AssertEquals("An enum should equal a copy",
  41                              0, e1.CompareTo(e2));
  42
  43                 TestingEnum x = TestingEnum.This;
  44                 TestingEnum y = TestingEnum.Is;
  45                 AssertEquals("should equal", 0, x.CompareTo(x));
  46                 AssertEquals("less than", -1, x.CompareTo(y));
  47                 AssertEquals("greater than", 1, y.CompareTo(x));
  48
  49                 {
  50                         bool errorThrown = false;
  51                         try {
  52                                 e1.CompareTo(e3);
  53                         } catch (ArgumentException) {
  54                                 errorThrown = true;
  55                         }
  56                         Assert("1) Compare type mismatch not caught.",
  57                                errorThrown);
  58                 }
  59                 {
  60                         bool errorThrown = false;
  61                         try {
  62                                 ((Enum)e1).CompareTo((Enum)e3);
  63                         } catch (ArgumentException) {
  64                                 errorThrown = true;
  65                         }
  66                         Assert("2) Compare type mismatch not caught.",
  67                                errorThrown);
  68                 }
  69         }
  70
  71         public void TestEquals() {
  72                 Enum e1 = new TestingEnum();
  73                 Enum e2 = new TestingEnum();
  74                 Enum e3 = new TestingEnum2();
  75
  76                 Assert("An enum should equal itself", e1.Equals(e1));
  77                 Assert("An enum should equal a copy", e1.Equals(e2));
  78
  79                 Assert("Shouldn't match", !e1.Equals(e3));
  80                 Assert("Shouldn't match null", !e1.Equals(null));
  81         }
  82
  83         public void TestFormat_Args() {
  84                 try {
  85                         TestingEnum x = TestingEnum.Test;
  86                         Enum.Format(null, x, "G");
  87                         Fail("null first arg not caught.");
  88                 } catch (ArgumentNullException) {
  89                         // do nothing
  90                 } catch (Exception e) {
  91                         Fail("first arg null, wrong exception: " + e.ToString());
  92                 }
  93
  94                 try {
  95                         Enum.Format(typeof(TestingEnum), null, "G");
  96                         Fail("null second arg not caught.");
  97                 } catch (ArgumentNullException) {
  98                         // do nothing
  99                 } catch (Exception e) {
 100                         Fail("second arg null, wrong exception: " + e.ToString());
 101                 }
 102
 103                 try {
 104                         TestingEnum x = TestingEnum.Test;
 105                         Enum.Format(x.GetType(), x, null);
 106                         Fail("null third arg not caught.");
 107                 } catch (ArgumentNullException) {
 108                         // do nothing
 109                 } catch (Exception e) {
 110                         Fail("third arg null, wrong exception: " + e.ToString());
 111                 }
 112
 113                 try {
 114                         TestingEnum x = TestingEnum.Test;
 115                         Enum.Format(typeof(string), x, "G");
 116                         Fail("bad type arg not caught.");
 117                 } catch (ArgumentException) {
 118                         // do nothing
 119                 } catch (Exception e) {
 120                         Fail("bad type, wrong exception: " + e.ToString());
 121                 }
 122
 123                 try {
 124                         TestingEnum x = TestingEnum.Test;
 125                         TestingEnum2 y = TestingEnum2.Test;
 126                         Enum.Format(y.GetType(), x, "G");
 127                         Fail("wrong enum type not caught.");
 128                 } catch (ArgumentException) {
 129                         // do nothing
 130                 } catch (Exception e) {
 131                         Fail("wrong enum type, wrong exception: " + e.ToString());
 132                 }
 133
 134                 try {
 135                         String bad = "huh?";
 136                         TestingEnum x = TestingEnum.Test;
 137                         Enum.Format(x.GetType(), bad, "G");
 138                         Fail("non-enum object not caught.");
 139                 } catch (ArgumentException) {
 140                         // do nothing
 141                 } catch (Exception e) {
 142                         Fail("non-enum object, wrong exception: " + e.ToString());
 143                 }
 144
 145                 string[] codes = {"a", "b", "c", "ad", "e", "af", "ag", "h",
 146                                   "i", "j", "k", "l", "m", "n", "o", "p",
 147                                   "q", "r", "s", "t", "u", "v", "w", "ax",
 148                                   "y", "z"};
 149                 foreach (string code in codes) {
 150                         try {
 151                                 TestingEnum x = TestingEnum.Test;
 152                                 Enum.Format(x.GetType(), x, code);
 153                                 Fail ("bad format code not caught - " + code);
 154                         } catch (FormatException) {
 155                                 // do nothing
 156                         } catch (Exception e) {
 157                                 Fail (String.Format ("bad format code ({0}), wrong exception: {1}",
 158                                                      code, e.ToString()));
 159                         }
 160                 }
 161
 162                 TestingEnum ex = TestingEnum.Test;
 163                 AssertEquals("decimal format wrong",
 164                              "3", Enum.Format(ex.GetType(), ex, "d"));
 165                 AssertEquals("decimal format wrong for ulong enums",
 166                              "18446744073709551615", Enum.Format(typeof(TestingEnum3), TestingEnum3.Test, "d"));
 167                 AssertEquals("named format wrong",
 168                              "Test", Enum.Format(ex.GetType(), ex, "g"));
 169                 AssertEquals("hex format wrong",
 170                              "00000003", Enum.Format(ex.GetType(), ex, "x"));
 171                 AssertEquals("bitfield format wrong",
 172                              "Test", Enum.Format(ex.GetType(), ex, "f"));
 173         }
 174
 175         public void TestFormat_FormatSpecifier ()
 176         {
 177                 ParameterAttributes pa =
 178                         ParameterAttributes.In | ParameterAttributes.HasDefault;
 179                 const string fFormatOutput = "In, HasDefault";
 180                 const string xFormatOutput = "00001001";
 181                 string fOutput = Enum.Format (pa.GetType(), pa, "f");
 182                 AssertEquals ("#F_FS:f", fFormatOutput, fOutput);
 183                 string xOutput = Enum.Format (pa.GetType(), pa, "x");
 184                 AssertEquals ("#F_FS:x", xFormatOutput, xOutput);
 185         }
 186
 187         public void TestGetHashCode() {
 188                 Enum e1 = new TestingEnum();
 189                 Enum e2 = new TestingEnum2();
 190
 191                 AssertEquals("hash code is deterministic",
 192                              e1.GetHashCode(), e1.GetHashCode());
 193         }
 194
 195         public void GetName() {
 196                 {
 197                         bool errorThrown = false;
 198                         try {
 199                                 TestingEnum x = TestingEnum.Test;
 200                                 Enum.GetName(null, x);
 201                         } catch (ArgumentNullException) {
 202                                 errorThrown = true;
 203                         }
 204                         Assert("null first arg not caught.",
 205                                errorThrown);
 206                 }
 207                 {
 208                         bool errorThrown = false;
 209                         try {
 210                                 TestingEnum x = TestingEnum.Test;
 211                                 Enum.GetName(x.GetType(), null);
 212                         } catch (ArgumentNullException) {
 213                                 errorThrown = true;
 214                         }
 215                         Assert("null second arg not caught.",
 216                                errorThrown);
 217                 }
 218                 {
 219                         bool errorThrown = false;
 220                         try {
 221                                 String bad = "huh?";
 222                                 TestingEnum x = TestingEnum.Test;
 223                                 Enum.GetName(bad.GetType(), x);
 224                         } catch (ArgumentException) {
 225                                 errorThrown = true;
 226                         }
 227                         Assert("non-enum type not caught.",
 228                                errorThrown);
 229                 }
 230                 {
 231                         bool errorThrown = false;
 232                         try {
 233                                 TestingEnum x = TestingEnum.Test;
 234                                 TestingEnum2 y = TestingEnum2.Test;
 235                                 Enum.GetName(y.GetType(), x);
 236                         } catch (ArgumentException) {
 237                                 errorThrown = true;
 238                         }
 239                         Assert("wrong enum type not caught.",
 240                                errorThrown);
 241                 }
 242                 {
 243                         bool errorThrown = false;
 244                         try {
 245                                 String bad = "huh?";
 246                                 TestingEnum x = TestingEnum.Test;
 247                                 Enum.GetName(x.GetType(), bad);
 248                         } catch (ArgumentException) {
 249                                 errorThrown = true;
 250                         }
 251                         Assert("non-enum object not caught.",
 252                                errorThrown);
 253                 }
 254                 {
 255                         TestingEnum x = TestingEnum.This;
 256                         TestingEnum y = TestingEnum.Is;
 257                         TestingEnum z = TestingEnum.A;
 258
 259                         AssertEquals("first name doesn't match",
 260                                      "This", Enum.GetName(x.GetType(), x));
 261                         AssertEquals("second name doesn't match",
 262                                      "Is", Enum.GetName(y.GetType(), y));
 263                         AssertEquals("third name doesn't match",
 264                                      "A", Enum.GetName(z.GetType(), z));
 265                 }
 266         }
 267
 268         public void TestGetNames() {
 269                 {
 270                         bool errorThrown = false;
 271                         try {
 272                                 Enum.GetNames(null);
 273                         } catch (ArgumentNullException) {
 274                                 errorThrown = true;
 275                         }
 276                         Assert("null type not caught.",
 277                                errorThrown);
 278                 }
 279                 {
 280                         TestingEnum x = TestingEnum.This;
 281                         string[] match = {"This", "Is", "A", "Test"};
 282                         string[] names = Enum.GetNames(x.GetType());
 283                         AssertNotNull("Got no names", names);
 284                         AssertEquals("names wrong size",
 285                                      match.Length, names.Length);
 286                         for (int i = 0; i < names.Length; i++) {
 287                                 AssertEquals("name mismatch",
 288                                              match[i], names[i]);
 289                         }
 290                 }
 291         }
 292
 293         public void TestGetTypeCode() {
 294                 TestingEnum x = TestingEnum.This;
 295                 TestingEnum y = new TestingEnum();
 296                 AssertEquals("01 bad type code",
 297                              TypeCode.Int32, x.GetTypeCode());
 298                 AssertEquals("02 bad type code",
 299                              TypeCode.Int32, y.GetTypeCode());
 300         }
 301
 302         enum TestShortEnum : short { zero, one, two, three, four, five, six};
 303         public void TestGetUnderlyingType() {
 304                 {
 305                         bool errorThrown = false;
 306                         try {
 307                                 Enum.GetUnderlyingType(null);
 308                         } catch (ArgumentNullException) {
 309                                 errorThrown = true;
 310                         }
 311                         Assert("null type not caught.",
 312                                errorThrown);
 313                 }
 314                 {
 315                         bool errorThrown = false;
 316                         try {
 317                                 String bad = "huh?";
 318                                 Enum.GetUnderlyingType(bad.GetType());
 319                         } catch (ArgumentException) {
 320                                 errorThrown = true;
 321                         }
 322                         Assert("non-enum type not caught.",
 323                                errorThrown);
 324                 }
 325                 {
 326                         short sh = 5;
 327                         int i = 5;
 328                         Enum t1 = new TestingEnum();
 329                         Enum t2 = new TestShortEnum();
 330                         AssertEquals("Wrong default underlying type",
 331                                      i.GetType(),
 332                                      Enum.GetUnderlyingType(t1.GetType()));
 333                         AssertEquals("Not short underlying type",
 334                                      sh.GetType(),
 335                                      Enum.GetUnderlyingType(t2.GetType()));
 336                 }
 337         }
 338
 339         public void TestGetValues() {
 340                 {
 341                         bool errorThrown = false;
 342                         try {
 343                                 Enum.GetValues(null);
 344                         } catch (ArgumentNullException) {
 345                                 errorThrown = true;
 346                         }
 347                         Assert("null type not caught.",
 348                                errorThrown);
 349                 }
 350                 {
 351                         bool errorThrown = false;
 352                         try {
 353                                 String bad = "huh?";
 354                                 Enum.GetValues(bad.GetType());
 355                         } catch (ArgumentException) {
 356                                 errorThrown = true;
 357                         }
 358                         Assert("non-enum type not caught.",
 359                                errorThrown);
 360                 }
 361                 {
 362                         Enum t1 = new TestingEnum();
 363                         Array a1 = Enum.GetValues(t1.GetType());
 364                         for (int i= 0; i < a1.Length; i++) {
 365                                 AssertEquals("wrong enum value",
 366                                              (TestingEnum)i,
 367                                              a1.GetValue(i));
 368                         }
 369                 }
 370                 {
 371                         Enum t1 = new TestShortEnum();
 372                         Array a1 = Enum.GetValues(t1.GetType());
 373                         for (short i= 0; i < a1.Length; i++) {
 374                                 AssertEquals("wrong short enum value",
 375                                              (TestShortEnum)i,
 376                                              a1.GetValue(i));
 377                         }
 378                 }
 379         }
 380
 381         public void TestIsDefined() {
 382                 {
 383                         bool errorThrown = false;
 384                         try {
 385                                 Enum.IsDefined(null, 1);
 386                         } catch (ArgumentNullException) {
 387                                 errorThrown = true;
 388                         }
 389                         Assert("null first arg not caught.",
 390                                errorThrown);
 391                 }
 392                 {
 393                         bool errorThrown = false;
 394                         try {
 395                                 TestingEnum x = TestingEnum.Test;
 396                                 Enum.IsDefined(x.GetType(), null);
 397                         } catch (ArgumentNullException) {
 398                                 errorThrown = true;
 399                         }
 400                         Assert("null second arg not caught.",
 401                                errorThrown);
 402                 }
 403                 {
 404                         bool errorThrown = false;
 405                         try {
 406                                 String bad = "huh?";
 407                                 int i = 4;
 408                                 Enum.IsDefined(bad.GetType(), i);
 409                         } catch (ArgumentException) {
 410                                 errorThrown = true;
 411                         }
 412                         Assert("non-enum type not caught.",
 413                                errorThrown);
 414                 }
 415
 416                 try {
 417                         TestingEnum x = TestingEnum.Test;
 418                         short i = 4;
 419                         Enum.IsDefined(x.GetType(), i);
 420                         Fail("wrong underlying type not caught.");
 421                 } catch (ArgumentException) {
 422                 } catch (Exception e) {
 423                         Fail("wrong Exception thrown ("+e.ToString()+")for underlying type not caught.");
 424                 }
 425
 426                 // spec says yes, MS impl says no.
 427                 //{
 428                 //bool errorThrown = false;
 429                 //try {
 430                 //String bad = "huh?";
 431                 //TestingEnum x = TestingEnum.Test;
 432                 //Enum.IsDefined(x.GetType(), bad);
 433                 //} catch (ExecutionEngineException) {
 434                 //errorThrown = true;
 435                 //}
 436                 //Assert("non-enum object not caught.",
 437                 //errorThrown);
 438                 //}
 439                 {
 440                         Enum t1 = new TestingEnum();
 441                         int i = 0;
 442                         for (i = 0;
 443                              i < Enum.GetValues(t1.GetType()).Length; i++) {
 444                                 Assert("should have value for i=" + i,
 445                                        Enum.IsDefined(t1.GetType(), i));
 446                         }
 447                         Assert("Shouldn't have value",
 448                                !Enum.IsDefined(t1.GetType(), i));
 449                 }
 450         }
 451
 452         public void TestParse1() {
 453                 {
 454                         bool errorThrown = false;
 455                         try {
 456                                 String name = "huh?";
 457                                 Enum.Parse(null, name);
 458                         } catch (ArgumentNullException) {
 459                                 errorThrown = true;
 460                         }
 461                         Assert("null first arg not caught.",
 462                                errorThrown);
 463                 }
 464                 {
 465                         bool errorThrown = false;
 466                         try {
 467                                 TestingEnum x = TestingEnum.Test;
 468                                 Enum.Parse(x.GetType(), null);
 469                         } catch (ArgumentNullException) {
 470                                 errorThrown = true;
 471                         }
 472                         Assert("null second arg not caught.",
 473                                errorThrown);
 474                 }
 475                 {
 476                         bool errorThrown = false;
 477                         try {
 478                                 String bad = "huh?";
 479                                 Enum.Parse(bad.GetType(), bad);
 480                         } catch (ArgumentException) {
 481                                 errorThrown = true;
 482                         }
 483                         Assert("non-enum type not caught.",
 484                                errorThrown);
 485                 }
 486                 {
 487                         bool errorThrown = false;
 488                         try {
 489                                 TestingEnum x = TestingEnum.Test;
 490                                 String bad = "";
 491                                 Enum.Parse(x.GetType(), bad);
 492                         } catch (ArgumentException) {
 493                                 errorThrown = true;
 494                         }
 495                         Assert("empty string not caught.",
 496                                errorThrown);
 497                 }
 498                 {
 499                         bool errorThrown = false;
 500                         try {
 501                                 TestingEnum x = TestingEnum.Test;
 502                                 String bad = " ";
 503                                 Enum.Parse(x.GetType(), bad);
 504                         } catch (ArgumentException) {
 505                                 errorThrown = true;
 506                         }
 507                         Assert("space-only string not caught.",
 508                                errorThrown);
 509                 }
 510                 {
 511                         bool errorThrown = false;
 512                         try {
 513                                 String bad = "huh?";
 514                                 TestingEnum x = TestingEnum.Test;
 515                                 Enum.Parse(x.GetType(), bad);
 516                         } catch (ArgumentException) {
 517                                 errorThrown = true;
 518                         }
 519                         Assert("not-in-enum error not caught.",
 520                                errorThrown);
 521                 }
 522                 {
 523                         TestingEnum t1 = new TestingEnum();
 524                         AssertEquals("parse first enum",
 525                                      TestingEnum.This,
 526                                      Enum.Parse(t1.GetType(), "This"));
 527                         AssertEquals("parse second enum",
 528                                      TestingEnum.Is,
 529                                      Enum.Parse(t1.GetType(), "Is"));
 530                         AssertEquals("parse third enum",
 531                                      TestingEnum.A,
 532                                      Enum.Parse(t1.GetType(), "A"));
 533                         AssertEquals("parse last enum",
 534                                      TestingEnum.Test,
 535                                      Enum.Parse(t1.GetType(), "Test"));
 536
 537                         AssertEquals("parse last enum with whitespace",
 538                                      TestingEnum.Test,
 539                                      Enum.Parse(t1.GetType(), "    \n\nTest\t"));
 540
 541                         AssertEquals("parse bitwise-or enum",
 542                                      TestingEnum.Is,
 543                                      Enum.Parse(t1.GetType(), "This,Is"));
 544                         AssertEquals("parse bitwise-or enum",
 545                                      TestingEnum.Test,
 546                                      Enum.Parse(t1.GetType(), "This,Test"));
 547                         AssertEquals("parse bitwise-or enum",
 548                                      TestingEnum.Test,
 549                                      Enum.Parse(t1.GetType(), "This,Is,A"));
 550
 551                         AssertEquals("parse bitwise-or enum with whitespace",
 552                                      TestingEnum.Test,
 553                                      Enum.Parse(t1.GetType(), "   \n\tThis \t\n,    Is,A \n"));
 554                 }
 555         }
 556         public void TestParse2() {
 557                 {
 558                         bool errorThrown = true;
 559                         try {
 560                                 String name = "huh?";
 561                                 Enum.Parse(null, name, true);
 562                         } catch (ArgumentNullException) {
 563                                 errorThrown = true;
 564                         }
 565                         Assert("null first arg not caught.",
 566                                errorThrown);
 567                 }
 568                 {
 569                         bool errorThrown = true;
 570                         try {
 571                                 TestingEnum x = TestingEnum.Test;
 572                                 Enum.Parse(x.GetType(), null, true);
 573                         } catch (ArgumentNullException) {
 574                                 errorThrown = true;
 575                         }
 576                         Assert("null second arg not caught.",
 577                                errorThrown);
 578                 }
 579                 {
 580                         bool errorThrown = true;
 581                         try {
 582                                 String bad = "huh?";
 583                                 Enum.Parse(bad.GetType(), bad, true);
 584                         } catch (ArgumentException) {
 585                                 errorThrown = true;
 586                         }
 587                         Assert("non-enum type not caught.",
 588                                errorThrown);
 589                 }
 590                 {
 591                         bool errorThrown = true;
 592                         try {
 593                                 TestingEnum x = TestingEnum.Test;
 594                                 String bad = "";
 595                                 Enum.Parse(x.GetType(), bad, true);
 596                         } catch (ArgumentException) {
 597                                 errorThrown = true;
 598                         }
 599                         Assert("empty string not caught.",
 600                                errorThrown);
 601                 }
 602                 {
 603                         bool errorThrown = true;
 604                         try {
 605                                 TestingEnum x = TestingEnum.Test;
 606                                 String bad = " ";
 607                                 Enum.Parse(x.GetType(), bad, true);
 608                         } catch (ArgumentException) {
 609                                 errorThrown = true;
 610                         }
 611                         Assert("space-only string not caught.",
 612                                errorThrown);
 613                 }
 614                 {
 615                         bool errorThrown = true;
 616                         try {
 617                                 String bad = "huh?";
 618                                 TestingEnum x = TestingEnum.Test;
 619                                 Enum.Parse(x.GetType(), bad, true);
 620                         } catch (ArgumentException) {
 621                                 errorThrown = true;
 622                         }
 623                         Assert("not-in-enum error not caught.",
 624                                errorThrown);
 625                 }
 626                 {
 627                         bool errorThrown = true;
 628                         try {
 629                                 String bad = "test";
 630                                 TestingEnum x = TestingEnum.Test;
 631                                 Enum.Parse(x.GetType(), bad, false);
 632                         } catch (ArgumentException) {
 633                                 errorThrown = true;
 634                         }
 635                         Assert("not-in-enum error not caught.",
 636                                errorThrown);
 637                 }
 638                 {
 639                         TestingEnum t1 = new TestingEnum();
 640                         AssertEquals("parse first enum",
 641                                      TestingEnum.This,
 642                                      Enum.Parse(t1.GetType(), "this", true));
 643                         AssertEquals("parse second enum",
 644                                      TestingEnum.Is,
 645                                      Enum.Parse(t1.GetType(), "is", true));
 646                         AssertEquals("parse third enum",
 647                                      TestingEnum.A,
 648                                      Enum.Parse(t1.GetType(), "a", true));
 649                         AssertEquals("parse last enum",
 650                                      TestingEnum.Test,
 651                                      Enum.Parse(t1.GetType(), "test", true));
 652
 653                         AssertEquals("parse last enum with whitespace",
 654                                      TestingEnum.Test,
 655                                      Enum.Parse(t1.GetType(), "    \n\ntest\t", true));
 656
 657                         AssertEquals("parse bitwise-or enum",
 658                                      TestingEnum.Is,
 659                                      Enum.Parse(t1.GetType(), "This,is", true));
 660                         AssertEquals("parse bitwise-or enum",
 661                                      TestingEnum.Test,
 662                                      Enum.Parse(t1.GetType(), "This,test", true));
 663                         AssertEquals("parse bitwise-or enum",
 664                                      TestingEnum.Test,
 665                                      Enum.Parse(t1.GetType(), "This,is,A", true));
 666
 667                         AssertEquals("parse bitwise-or enum with whitespace",
 668                                      TestingEnum.Test,
 669                                          Enum.Parse(t1.GetType(), "   \n\tThis \t\n,    is,a \n",
 670                                                         true));
 671                 }
 672         }
 673
 674         [Test]
 675         public void ParseValue() {
 676                 TestingEnum3 t1 = new TestingEnum3();
 677                 AssertEquals ("Parse numeric value", TestingEnum3.Test, Enum.Parse(t1.GetType(), "18446744073709551615", false));
 678         }
 679
 680         public void TestToObject() {
 681                 {
 682                         bool errorThrown = false;
 683                         try {
 684                                 Enum.ToObject(null, 1);
 685                         } catch (ArgumentNullException) {
 686                                 errorThrown = true;
 687                         }
 688                         Assert("null type not caught.",
 689                                errorThrown);
 690                 }
 691                 {
 692                         bool errorThrown = false;
 693                         try {
 694                                 Enum.ToObject("huh?".GetType(), 1);
 695                         } catch (ArgumentException) {
 696                                 errorThrown = true;
 697                         }
 698                         Assert("null type not caught.",
 699                                errorThrown);
 700                 }
 701                 {
 702                         TestingEnum t1 = new TestingEnum();
 703                         AssertEquals("Should get object",
 704                                      TestingEnum.This,
 705                                      Enum.ToObject(t1.GetType(), 0));
 706                 }
 707                 // TODO - should probably test all the different underlying types
 708         }
 709
 710         [Flags]
 711         enum SomeEnum {a,b,c};
 712
 713         [Flags]
 714         enum SomeByteEnum : byte {a,b,c};
 715
 716         [Flags]
 717         enum SomeInt64Enum : long {a,b,c};
 718
 719         public void TestToString() {
 720                 int i = 0;
 721                 try {
 722                         i++;
 723                         AssertEquals("invalid string", "This",
 724                                      TestingEnum.This.ToString());
 725                         i++;
 726                         AssertEquals("invalid string", "Is",
 727                                      TestingEnum.Is.ToString());
 728                         i++;
 729                         AssertEquals("invalid string", "A",
 730                                      TestingEnum.A.ToString());
 731                         i++;
 732                         AssertEquals("invalid string", "Test",
 733                                      TestingEnum.Test.ToString());
 734
 735                         Enum is1 = TestingEnum.Is;
 736
 737                         i++;
 738                         AssertEquals("decimal parse wrong",
 739                                      "1", is1.ToString("d"));
 740                         i++;
 741                         AssertEquals("named format wrong",
 742                                      "Is", is1.ToString("g"));
 743                         i++;
 744                         AssertEquals("hex format wrong",
 745                                      "00000001", is1.ToString("x"));
 746                         i++;
 747                         AssertEquals("bitfield format wrong",
 748                                      "Is", is1.ToString("f"));
 749
 750                         i++;
 751                         AssertEquals("bitfield with flags format wrong for Int32 enum",
 752                                      "b, c", ((SomeEnum)3).ToString("f"));
 753                         i++;
 754                         AssertEquals("bitfield with flags format wrong for Byte enum",
 755                                      "b, c", ((SomeByteEnum)3).ToString("f"));
 756                         i++;
 757                         AssertEquals("bitfield with flags format wrong for Int64 enum",
 758                                      "b, c", ((SomeInt64Enum)3).ToString("f"));
 759
 760                         i++;
 761                         AssertEquals("bitfield with unknown flags format wrong for Int32 enum",
 762                                      "12", ((SomeEnum)12).ToString("f"));
 763                         i++;
 764                         AssertEquals("bitfield with unknown flags format wrong for Byte enum",
 765                                      "12", ((SomeByteEnum)12).ToString("f"));
 766                         i++;
 767                         AssertEquals("bitfield with unknown flags format wrong for Int64 enum",
 768                                      "12", ((SomeInt64Enum)12).ToString("f"));
 769
 770                 } catch (Exception e) {
 771                         Fail ("Unexpected exception at i = " + i + " with e=" + e);
 772                 }
 773         }
 774
 775         enum E {
 776                 Aa=0,
 777                 Bb=1,
 778                 Cc=2,
 779                 Dd=3,
 780         }
 781
 782         [Flags]
 783         enum E2 {
 784                 Aa,
 785                 Bb,
 786                 Cc,
 787                 Dd,
 788         }
 789
 790         [Test]
 791         public void FlagTest ()
 792         {
 793                 int [] evalues = new int [4] {0,1,2,3};
 794                 E [] e = new E [4] {E.Aa, E.Bb, E.Cc, E.Dd};
 795
 796                 for (int i = 0; i < 4; ++i) {
 797                         Assertion.AssertEquals ("#" + i,
 798                                 e [i].ToString (),
 799                                 Enum.Format (typeof (E), evalues [i], "f"));
 800                 }
 801         }
 802
 803
 804         [Test]
 805         public void FlagTest2 () {
 806                 int invalidValue = 1000;
 807
 808                 Assertion.AssertEquals ("#01",
 809                                 invalidValue.ToString (),
 810                                 Enum.Format (typeof (E2), invalidValue, "g"));
 811         }
 812
 813         enum E3 {A=0,B=1,C=2,D=3,}
 814         enum UE : ulong {A=1,B=2,C=4,D=8,}
 815         enum EA {A=0, B=2, C=3, D=4}
 816
 817         [Test]
 818         public void AnotherFormatBugPinned ()
 819         {
 820                 Assertion.AssertEquals ("#01", "100", Enum.Format (typeof (E3), 100, "f"));
 821         }
 822
 823         [Test]
 824         public void LogicBugPinned ()
 825         {
 826                 string format=null;
 827                 string[] names=new string[] {"A","B","C","D",};
 828                 string[] fmtSpl=null;
 829                 UE ue = UE.A | UE.B | UE.C | UE.D;
 830
 831                 //all flags must be in format return
 832                 format = Enum.Format (typeof (UE), ue, "f");
 833                 fmtSpl = format.Split (',');
 834                 for( int i=0 ; i<fmtSpl.Length ; ++i )
 835                         fmtSpl [i] = fmtSpl[i].Trim ();
 836
 837                 foreach (string nval in fmtSpl)
 838                         Assertion.Assert (nval + " is not a valid enum value name", Array.IndexOf (names, nval) >= 0);
 839
 840                 foreach (string nval in names)
 841                         Assertion.Assert (nval + " is not contained in format return.", Array.IndexOf (fmtSpl, nval) >= 0);
 842         }
 843         // TODO - ToString with IFormatProviders
 844 }
 845 }