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

   1 // MathTest.cs
   2 //
   3 // Jon Guymon (guymon@slackworks.com)
   4 // Pedro Martínez Juliá (yoros@wanadoo.es)
   5 //
   6 // (C) 2002 Jon Guymon
   7 // Copyright (C) 2003 Pedro Martínez Juliá <yoros@wanadoo.es>
   8 // Copyright (C) 2004 Novell (http://www.novell.com)
   9 //
  10
  11 using System;
  12 using NUnit.Framework;
  13
  14 namespace MonoTests.System
  15 {
  16
  17 [TestFixture]
  18 public class MathTest : Assertion {
  19
  20         static double x = 0.1234;
  21         static double y = 12.345;
  22
  23         public void TestDecimalAbs() {
  24                 decimal a = -9.0M;
  25
  26                 Assert(9.0M == Math.Abs(a));
  27                 Assert(Decimal.MaxValue == Math.Abs(Decimal.MaxValue));
  28                 Assert(Decimal.MaxValue == Math.Abs(Decimal.MinValue));
  29                 Assert(Decimal.Zero == Math.Abs(Decimal.Zero));
  30                 Assert(Decimal.One == Math.Abs(Decimal.One));
  31                 Assert(Decimal.One == Math.Abs(Decimal.MinusOne));
  32         }
  33
  34
  35         public void TestDoubleAbs() {
  36                 double a = -9.0D;
  37                 Assert(9.0D == Math.Abs(a));
  38                 Assert(0.0D == Math.Abs(0.0D));
  39                 Assert(Double.MaxValue == Math.Abs(Double.MaxValue));
  40                 Assert(Double.MaxValue == Math.Abs(Double.MinValue));
  41                 Assert(Double.IsPositiveInfinity(Math.Abs(Double.PositiveInfinity)));
  42                 Assert(Double.IsPositiveInfinity(Math.Abs(Double.NegativeInfinity)));
  43                 Assert(Double.IsNaN(Math.Abs(Double.NaN)));
  44         }
  45
  46         public void TestFloatAbs() {
  47                 float a = -9.0F;
  48
  49                 Assert(9.0F == Math.Abs(a));
  50                 Assert(0.0F == Math.Abs(0.0F));
  51                 Assert(Single.MaxValue == Math.Abs(Single.MaxValue));
  52                 Assert(Single.MaxValue == Math.Abs(Single.MinValue));
  53                 Assert(Single.PositiveInfinity == Math.Abs(Single.PositiveInfinity));
  54                 Assert(Single.PositiveInfinity == Math.Abs(Single.NegativeInfinity));
  55                 Assert(Single.IsNaN(Math.Abs(Single.NaN)));
  56         }
  57
  58         public void TestLongAbs() {
  59                 long a = -9L;
  60                 long b = Int64.MinValue;
  61
  62                 Assert(9L == Math.Abs(a));
  63                 try {
  64                         Math.Abs(b);
  65                         Fail("Should raise System.OverflowException");
  66                 } catch(Exception e) {
  67                         Assert(typeof(OverflowException) == e.GetType());
  68                 }
  69                 Assert(Int64.MaxValue == Math.Abs(Int64.MaxValue));
  70         }
  71
  72         public void TestIntAbs() {
  73                 int a = -9;
  74                 int b = Int32.MinValue;
  75
  76                 Assert(9 == Math.Abs(a));
  77                 try {
  78                         Math.Abs(b);
  79                         Fail("Should raise System.OverflowException");
  80                 } catch(Exception e) {
  81                         Assert(typeof(OverflowException) == e.GetType());
  82                 }
  83                 Assert(Int32.MaxValue == Math.Abs(Int32.MaxValue));
  84         }
  85
  86         public void TestSbyteAbs() {
  87                 sbyte a = -9;
  88                 sbyte b = SByte.MinValue;
  89
  90                 Assert(9 == Math.Abs(a));
  91                 try {
  92                         Math.Abs(b);
  93                         Fail("Should raise System.OverflowException");
  94                 } catch(Exception e) {
  95                         Assert(typeof(OverflowException) == e.GetType());
  96                 }
  97                 Assert(SByte.MaxValue == Math.Abs(SByte.MaxValue));
  98         }
  99
 100         public void TestShortAbs() {
 101                 short a = -9;
 102                 short b = Int16.MinValue;
 103
 104                 Assert(9 == Math.Abs(a));
 105                 try {
 106                         Math.Abs(b);
 107                         Fail("Should raise System.OverflowException");
 108                 } catch(Exception e) {
 109                         Assert(typeof(OverflowException) == e.GetType());
 110                 }
 111                 Assert(Int16.MaxValue == Math.Abs(Int16.MaxValue));
 112         }
 113
 114         public void TestAcos() {
 115                 double a = Math.Acos(x);
 116                 double b = 1.4470809809523457;
 117
 118                 Assert(a.ToString("G99") + " != " + b.ToString("G99"),
 119                        (Math.Abs(a - b) <= double.Epsilon));
 120                 Assert(double.IsNaN(Math.Acos(-1.01D)));
 121                 Assert(double.IsNaN(Math.Acos(1.01D)));
 122                 Assert(double.IsNaN(Math.Acos(Double.MinValue)));
 123                 Assert(double.IsNaN(Math.Acos(Double.MaxValue)));
 124                 Assert(double.IsNaN(Math.Acos(Double.NegativeInfinity)));
 125                 Assert(double.IsNaN(Math.Acos(Double.PositiveInfinity)));
 126         }
 127
 128         public void TestAsin() {
 129                 double a = Math.Asin(x);
 130                 double b = 0.12371534584255098;
 131
 132                 Assert(a.ToString("G99") + " != " + b.ToString("G99"),
 133                        (Math.Abs(a - b) <= double.Epsilon));
 134                 Assert(double.IsNaN(Math.Asin(-1.01D)));
 135                 Assert(double.IsNaN(Math.Asin(1.01D)));
 136                 Assert(double.IsNaN(Math.Asin(Double.MinValue)));
 137                 Assert(double.IsNaN(Math.Asin(Double.MaxValue)));
 138                 Assert(double.IsNaN(Math.Asin(Double.NegativeInfinity)));
 139                 Assert(double.IsNaN(Math.Asin(Double.PositiveInfinity)));
 140         }
 141
 142         public void TestAtan() {
 143                 double a = Math.Atan(x);
 144                 double b = 0.12277930094473837;
 145                 double c = 1.5707963267948966;
 146                 double d = -1.5707963267948966;
 147
 148                 Assert("#1: " + a.ToString("G99") + " != " + b.ToString("G99"),
 149                        (Math.Abs(a - b) <= double.Epsilon));
 150                 Assert("should return NaN",
 151                        double.IsNaN(Math.Atan(double.NaN)));
 152                 Assert("#2: " + Math.Atan(double.PositiveInfinity).ToString("G99")+" != "+c.ToString("G99"),
 153                        Math.Abs((double)Math.Atan(double.PositiveInfinity) - c) <= 0.0000000000000001);
 154                 Assert("#3: " + Math.Atan(double.NegativeInfinity).ToString("G99")+" != "+d.ToString("G99"),
 155                        Math.Abs((double)Math.Atan(double.NegativeInfinity) - d) <= 0.0000000000000001);
 156         }
 157
 158         public void TestAtan2() {
 159                 double a = Math.Atan2(x, y);
 160                 double b = 0.0099956168687207747;
 161
 162                 Assert(a.ToString("G99") + " != " + b.ToString("G99"),
 163                        (Math.Abs(a - b) <= double.Epsilon));
 164                 Assert(double.IsNaN(Math.Acos(-2D)));
 165                 Assert(double.IsNaN(Math.Acos(2D)));
 166         }
 167
 168         // The following test is for methods that are in ECMA but they are
 169         // not implemented in MS.NET. I leave them commented.
 170         /*
 171         public void TestBigMul () {
 172                 int a = int.MaxValue;
 173                 int b = int.MaxValue;
 174
 175                 Assert(((long)a * (long)b) == Math.BigMul(a,b));
 176         }
 177         */
 178
 179         public void TestCos() {
 180                 double a = Math.Cos(x);
 181                 double b = 0.99239587670489104;
 182
 183                 Assert(a.ToString("G99") + " != " + b.ToString("G99"),
 184                        (Math.Abs(a - b) <= double.Epsilon));
 185                 Assert(double.IsNaN(Math.Cos(Double.NaN)));
 186                 Assert(double.IsNaN(Math.Cos(Double.NegativeInfinity)));
 187                 Assert(double.IsNaN(Math.Cos(Double.PositiveInfinity)));
 188         }
 189
 190         public void TestCosh() {
 191                 double a = Math.Cosh(x);
 192                 double b = 1.0076234465130722;
 193
 194                 Assert(a.ToString("G99") + " != " + b.ToString("G99"),
 195                        (Math.Abs(a - b) <= double.Epsilon));
 196                 Assert(Math.Cosh(double.NegativeInfinity) == double.PositiveInfinity);
 197                 Assert(Math.Cosh(double.PositiveInfinity) == double.PositiveInfinity);
 198                 Assert(double.IsNaN(Math.Cosh(double.NaN)));
 199         }
 200
 201         // The following test is for methods that are in ECMA but they are
 202         // not implemented in MS.NET. I leave them commented.
 203         /*
 204         public void TestIntDivRem () {
 205                 int a = 5;
 206                 int b = 2;
 207                 int div = 0, rem = 0;
 208
 209                 div = Math.DivRem(a, b, out rem);
 210
 211                 Assert(rem == 1);
 212                 Assert(div == 2);
 213         }
 214
 215         public void TestLongDivRem () {
 216                 long a = 5;
 217                 long b = 2;
 218                 long div = 0, rem = 0;
 219
 220                 div = Math.DivRem(a, b, out rem);
 221
 222                 Assert(rem == 1);
 223                 Assert(div == 2);
 224         }
 225         */
 226
 227         public void TestSin() {
 228                 double a = Math.Sin(x);
 229                 double b = 0.12308705821137626;
 230
 231                 Assert(a.ToString("G99") + " != " + b.ToString("G99"),
 232                        (Math.Abs(a - b) <= double.Epsilon));
 233                 Assert(double.IsNaN(Math.Sin(Double.NaN)));
 234                 Assert(double.IsNaN(Math.Sin(Double.NegativeInfinity)));
 235                 Assert(double.IsNaN(Math.Sin(Double.PositiveInfinity)));
 236         }
 237
 238         public void TestSinh() {
 239                 double a = Math.Sinh(x);
 240                 double b = 0.12371341868561381;
 241
 242                 Assert(a.ToString("G99") + " != " + b.ToString("G99"),
 243                        Math.Abs(a - b) <= 0.0000000000000001);
 244                 Assert(double.IsNaN(Math.Sinh(Double.NaN)));
 245                 Assert(double.IsNegativeInfinity(Math.Sinh(Double.NegativeInfinity)));
 246                 Assert(double.IsPositiveInfinity(Math.Sinh(Double.PositiveInfinity)));
 247         }
 248
 249         public void TestTan() {
 250                 double a = Math.Tan(x);
 251                 double b = 0.12403019913793806;
 252
 253                 Assert(a.ToString("G99") + " != " + b.ToString("G99"),
 254                        (Math.Abs(a - b) <= double.Epsilon));
 255                 Assert(Double.IsNaN(Math.Tan(Double.NaN)));
 256                 Assert(Double.IsNaN(Math.Tan(Double.PositiveInfinity)));
 257                 Assert(Double.IsNaN(Math.Tan(Double.NegativeInfinity)));
 258         }
 259
 260         public void TestTanh() {
 261                 double a = Math.Tanh(x);
 262                 double b = 0.12277743150353424;
 263
 264                 Assert(a.ToString("G99") + " != " + b.ToString("G99"),
 265                        (Math.Abs(a - b) <= double.Epsilon));
 266                 Assert("Tanh(NaN) should be NaN",
 267                         Double.IsNaN(Math.Tanh(Double.NaN)));
 268                 Assert("Tanh(+Infinity) should be 1",
 269                         1 == Math.Tanh(Double.PositiveInfinity));
 270                 Assert("Tanh(-Infinity) should be -1",
 271                         -1 == Math.Tanh(Double.NegativeInfinity));
 272         }
 273
 274         public void TestSqrt() {
 275                 double a = Math.Sqrt(x);
 276                 double b = 0.35128336140500593;
 277
 278                 Assert(a.ToString("G99") + " != " + b.ToString("G99"),
 279                        (Math.Abs(a - b) <= double.Epsilon));
 280                 Assert(Double.IsNaN(Math.Sqrt(Double.NaN)));
 281                 Assert(Double.IsPositiveInfinity(Math.Sqrt(Double.PositiveInfinity)));
 282                 Assert(Double.IsNaN(Math.Sqrt(Double.NegativeInfinity)));
 283         }
 284
 285         public void TestExp() {
 286                 double a = Math.Exp(x);
 287                 double b = 1.1313368651986859;
 288
 289                 Assert(a.ToString("G99") + " != " + b.ToString("G99"),
 290                        (Math.Abs(a - b) <= double.Epsilon));
 291                 Assert(double.IsNaN(Math.Exp(double.NaN)));
 292                 Assert(Math.Exp(double.NegativeInfinity) == 0);
 293                 Assert(Math.Exp(double.PositiveInfinity) == double.PositiveInfinity);
 294         }
 295
 296         public void TestCeiling() {
 297                 int iTest = 1;
 298                 try {
 299                         double a = Math.Ceiling(1.5);
 300                         double b = 2;
 301
 302                         iTest++;
 303                         Assert(a.ToString("G99") + " != " + b.ToString("G99"),
 304                                (Math.Abs(a - b) <= double.Epsilon));
 305                         iTest++;
 306                         Assert(Math.Ceiling(double.NegativeInfinity) == double.NegativeInfinity);
 307                         iTest++;
 308                         Assert(Math.Ceiling(double.PositiveInfinity) == double.PositiveInfinity);
 309                         iTest++;
 310                         Assert(double.IsNaN(Math.Ceiling(double.NaN)));
 311
 312                         iTest++;
 313                         Assert(Double.MaxValue == Math.Ceiling(Double.MaxValue));
 314
 315                         iTest++;
 316                         Assert(Double.MinValue == Math.Ceiling(Double.MinValue));
 317                 } catch (Exception e) {
 318                         Fail("Unexpected Exception at iTest=" + iTest + ": " + e);
 319                 }
 320         }
 321
 322         public void TestFloor() {
 323                 try {
 324                         double a = Math.Floor(1.5);
 325                         double b = 1;
 326
 327                         Assert(a.ToString("G99") + " != " + b.ToString("G99"),
 328                                (Math.Abs(a - b) <= double.Epsilon));
 329                         Assert(Math.Floor(double.NegativeInfinity) == double.NegativeInfinity);
 330                         Assert(Math.Floor(double.PositiveInfinity) == double.PositiveInfinity);
 331                         Assert(double.IsNaN(Math.Floor(double.NaN)));
 332
 333                         Assert(Double.MaxValue == Math.Floor(Double.MaxValue));
 334
 335                         Assert(Double.MinValue == Math.Floor(Double.MinValue));
 336                 } catch (Exception e) {
 337                         Fail("Unexpected Exception: " + e.ToString());
 338                 }
 339         }
 340
 341         public void TestIEEERemainder() {
 342                 double a = Math.IEEERemainder(y, x);
 343                 double b = 0.0050000000000007816;
 344
 345                 Assert(a.ToString("G99") + " != " + b.ToString("G99"),
 346                        (Math.Abs(a - b) <= double.Epsilon));
 347
 348                 Assert ("Positive 0", double.IsNaN (Math.IEEERemainder (y, 0)));
 349
 350                 // http://www.obtuse.com/resources/negative_zero.html
 351                 double n0 = BitConverter.Int64BitsToDouble (Int64.MinValue);
 352                 Assert ("Negative 0", double.IsNaN (Math.IEEERemainder (n0, 0)));
 353
 354                 // the "zero" remainder of negative number is negative
 355                 long result = BitConverter.DoubleToInt64Bits (Math.IEEERemainder (-1, 1));
 356                 AssertEquals ("Negative Dividend", Int64.MinValue, result);
 357         }
 358
 359         public void TestLog() {
 360                 double a = Math.Log(y);
 361                 double b = 2.513251122797143;
 362
 363                 Assert(a.ToString("G99") + " != " + b.ToString("G99"),
 364                        (Math.Abs(a - b) <= double.Epsilon));
 365                 Assert(double.IsNaN(Math.Log(-1)));
 366                 Assert(double.IsNaN(Math.Log(double.NaN)));
 367
 368                 // MS docs say this should be PositiveInfinity
 369                 Assert(Math.Log(0) == double.NegativeInfinity);
 370                 Assert(Math.Log(double.PositiveInfinity) == double.PositiveInfinity);
 371         }
 372
 373         public void TestLog2() {
 374                 double a = Math.Log(x, y);
 375                 double b = -0.83251695325303621;
 376
 377                 Assert(a + " != " + b + " because diff is " + Math.Abs(a - b), (Math.Abs(a - b) <= 1e-14));
 378                 Assert(double.IsNaN(Math.Log(-1, y)));
 379                 Assert(double.IsNaN(Math.Log(double.NaN, y)));
 380                 Assert(double.IsNaN(Math.Log(x, double.NaN)));
 381                 Assert(double.IsNaN(Math.Log(double.NegativeInfinity, y)));
 382                 Assert(double.IsNaN(Math.Log(x, double.NegativeInfinity)));
 383                 Assert(double.IsNaN(Math.Log(double.PositiveInfinity, double.PositiveInfinity)));
 384
 385                 // MS docs say this should be PositiveInfinity
 386                 Assert(Math.Log(0, y) == double.NegativeInfinity);
 387                 Assert(Math.Log(double.PositiveInfinity, y) == double.PositiveInfinity);
 388                 Assert(Math.Log(x, double.PositiveInfinity) == 0);
 389         }
 390
 391         public void TestLog10() {
 392                 double a = Math.Log10(x);
 393                 double b = -0.90868484030277719;
 394
 395                 Assert(a.ToString("G99") + " != " + b.ToString("G99"),
 396                        (Math.Abs(a - b) <= double.Epsilon));
 397                 Assert(double.IsNaN(Math.Log10(-1)));
 398                 Assert(double.IsNaN(Math.Log10(double.NaN)));
 399
 400                 // MS docs say this should be PositiveInfinity
 401                 Assert(Math.Log10(0) == double.NegativeInfinity);
 402                 Assert(Math.Log10(double.PositiveInfinity) == double.PositiveInfinity);
 403
 404         }
 405
 406         public void TestPow() {
 407                 int iTest = 1;
 408
 409                 try {
 410                         double a = Math.Pow(y, x);
 411                         double b = 1.363609446060212;
 412
 413                         Assert(a.ToString("G99") + " != " + b.ToString("G99"), (Math.Abs(a - b) <= double.Epsilon));
 414                         iTest++;
 415                         Assert (double.IsNaN(Math.Pow(y, double.NaN)));
 416                         iTest++;
 417                         Assert (double.IsNaN(Math.Pow(double.NaN, x)));
 418                         iTest++;
 419                         Assert ("Math.Pow(double.NegativeInfinity, 1) should be NegativeInfinity", double.IsNegativeInfinity(Math.Pow(double.NegativeInfinity, 1)));
 420                         iTest++;
 421                         Assert ("Math.Pow(double.NegativeInfinity, 2) should be PositiveInfinity", double.IsPositiveInfinity(Math.Pow(double.NegativeInfinity, 2)));
 422
 423                         // MS docs say this should be 0
 424                         iTest++;
 425                         Assert(double.IsNaN(Math.Pow(1, double.NegativeInfinity)));
 426                         iTest++;
 427                         AssertEquals ("Math.Pow(double.PositiveInfinity, double.NegativeInfinity)", (double)0, Math.Pow(double.PositiveInfinity, double.NegativeInfinity));
 428                         iTest++;
 429                         Assert ("Math.Pow(double.PositiveInfinity, 1) should be PositiveInfinity", double.IsPositiveInfinity(Math.Pow(double.PositiveInfinity, 1)));
 430
 431                         // MS docs say this should be PositiveInfinity
 432                         iTest++;
 433                         Assert ("Math.Pow(1, double.PositiveInfinity) should be NaN", double.IsNaN(Math.Pow(1, double.PositiveInfinity)));
 434
 435                         iTest++;
 436                         Assert("Math.Pow(1, NaN) should be NaN",
 437                                 Double.IsNaN(Math.Pow(1, Double.NaN)));
 438
 439                         iTest++;
 440                         Assert("Math.Pow(NaN, 0) should be NaN",
 441                                 Double.IsNaN(Math.Pow(Double.NaN, 0)));
 442
 443                         iTest++;
 444                         Assert("Math.Pow(-1, MaxValue) should be 1.0",
 445                                 1.0 == Math.Pow(-1, Double.MaxValue));
 446
 447                         iTest++;
 448                         Assert("Math.Pow(-1, MinValue) should be 1.0",
 449                                 1.0 == Math.Pow(-1, Double.MinValue));
 450
 451                         iTest++;
 452                         Assert("Math.Pow(MinValue, MaxValue) should be +Infinity",
 453                                 Double.IsPositiveInfinity(
 454                                         Math.Pow(Double.MinValue, Double.MaxValue)));
 455
 456                         iTest++;
 457                         Assert("Math.Pow(MinValue, MinValue) should be 0.0",
 458                                 0.0 == Math.Pow(Double.MinValue, Double.MinValue));
 459
 460                         //
 461                         // The following bugs were present because we tried to outsmart the C Pow:
 462                         //
 463                         double infinity = Double.PositiveInfinity;
 464                         Assert ("Math.Pow(0.5, Infinity) == 0.0",
 465                                 Math.Pow(0.5, infinity) == 0.0);
 466                         Assert ("Math.Pow(0.5, -Infinity) == Infinity",
 467                                 Math.Pow(0.5, -infinity) == infinity);
 468                         Assert ("Math.Pow(2, Infinity) == Infinity",
 469                                 Math.Pow(2, infinity) == infinity);
 470                         Assert ("Math.Pow(2, -Infinity) == 0",
 471                                 Math.Pow(2, -infinity) == 0.0);
 472                         Assert ("Math.Pow(Infinity, 0) == 1.0",
 473                                 Math.Pow(infinity, 0) == 1.0);
 474                         Assert ("Math.Pow(-Infinity, 0) == 1.0",
 475                                 Math.Pow(-infinity, 0) == 1.0);
 476                 } catch (Exception e) {
 477                         Fail ("Unexpected exception at iTest=" + iTest + ". e=" + e);
 478                 }
 479         }
 480
 481         public void TestByteMax() {
 482                 byte a = 1;
 483                 byte b = 2;
 484
 485                 Assert(b == Math.Max(a, b));
 486                 Assert(b == Math.Max(b, a));
 487         }
 488
 489         public void TestDecimalMax() {
 490                 decimal a = 1.5M;
 491                 decimal b = 2.5M;
 492
 493                 Assert(b == Math.Max(a, b));
 494                 Assert(b == Math.Max(b, a));
 495         }
 496
 497         public void TestDoubleMax() {
 498                 double a = 1.5D;
 499                 double b = 2.5D;
 500
 501                 Assert(b == Math.Max(a, b));
 502                 Assert(b == Math.Max(b, a));
 503                 Assert("Max(NaN,NaN) should be NaN",
 504                         Double.IsNaN(Math.Max(Double.NaN, Double.NaN)));
 505                 Assert("Max(NaN,x) should be NaN",
 506                         Double.IsNaN(Math.Max(Double.NaN, a)));
 507                 Assert("Max(x,NaN) should be NaN",
 508                         Double.IsNaN(Math.Max(b, Double.NaN)));
 509         }
 510
 511         public void TestFloatMax() {
 512                 float a = 1.5F;
 513                 float b = 2.5F;
 514
 515                 Assert(b == Math.Max(a, b));
 516                 Assert(b == Math.Max(b, a));
 517                 Assert("Max(NaN,NaN) should be NaN",
 518                         Single.IsNaN(Math.Max(Single.NaN, Single.NaN)));
 519                 Assert("Max(NaN,x) should be NaN",
 520                         Single.IsNaN(Math.Max(Single.NaN, a)));
 521                 Assert("Max(x,NaN) should be NaN",
 522                         Single.IsNaN(Math.Max(b, Single.NaN)));
 523         }
 524
 525         public void TestIntMax() {
 526                 int a = 1;
 527                 int b = 2;
 528
 529                 Assert(b == Math.Max(a, b));
 530                 Assert(b == Math.Max(b, a));
 531         }
 532
 533         public void TestLongMax() {
 534                 long a = 1L;
 535                 long b = 2L;
 536
 537                 Assert(b == Math.Max(a, b));
 538                 Assert(b == Math.Max(b, a));
 539         }
 540
 541         public void TestSbyteMax() {
 542                 sbyte a = 1;
 543                 sbyte b = 2;
 544
 545                 Assert(b == Math.Max(a, b));
 546                 Assert(b == Math.Max(b, a));
 547         }
 548
 549         public void TestShortMax() {
 550                 short a = 1;
 551                 short b = 2;
 552
 553                 Assert(b == Math.Max(a, b));
 554                 Assert(b == Math.Max(b, a));
 555         }
 556
 557         public void TestUintMax() {
 558                 uint a = 1U;
 559                 uint b = 2U;
 560
 561                 Assert(b == Math.Max(a, b));
 562                 Assert(b == Math.Max(b, a));
 563         }
 564
 565         public void TestUlongMax() {
 566                 ulong a = 1UL;
 567                 ulong b = 2UL;
 568
 569                 Assert(b == Math.Max(a, b));
 570                 Assert(b == Math.Max(b, a));
 571         }
 572
 573         public void TestUshortMax() {
 574                 ushort a = 1;
 575                 ushort b = 2;
 576
 577                 Assert(b == Math.Max(a, b));
 578                 Assert(b == Math.Max(b, a));
 579         }
 580
 581         public void TestByteMin() {
 582                 byte a = 1;
 583                 byte b = 2;
 584
 585                 Assert(a == Math.Min(a, b));
 586                 Assert(a == Math.Min(b, a));
 587         }
 588
 589         public void TestDecimalMin() {
 590                 decimal a = 1.5M;
 591                 decimal b = 2.5M;
 592
 593                 Assert(a == Math.Min(a, b));
 594                 Assert(a == Math.Min(b, a));
 595         }
 596
 597         public void TestDoubleMin() {
 598                 double a = 1.5D;
 599                 double b = 2.5D;
 600
 601                 Assert(a == Math.Min(a, b));
 602                 Assert(a == Math.Min(b, a));
 603                 Assert("Min(NaN,NaN) should be NaN",
 604                         Double.IsNaN(Math.Min(Double.NaN, Double.NaN)));
 605                 Assert("Min(NaN,x) should be NaN",
 606                         Double.IsNaN(Math.Min(Double.NaN, a)));
 607                 Assert("Min(x,NaN) should be NaN",
 608                         Double.IsNaN(Math.Min(b, Double.NaN)));
 609         }
 610
 611         public void TestFloatMin() {
 612                 float a = 1.5F;
 613                 float b = 2.5F;
 614
 615                 Assert(a == Math.Min(a, b));
 616                 Assert(a == Math.Min(b, a));
 617                 Assert("Min(NaN,NaN) should be NaN",
 618                         Single.IsNaN(Math.Min(Single.NaN, Single.NaN)));
 619                 Assert("Min(NaN,x) should be NaN",
 620                         Single.IsNaN(Math.Min(Single.NaN, a)));
 621                 Assert("Min(x,NaN) should be NaN",
 622                         Single.IsNaN(Math.Min(b, Single.NaN)));
 623         }
 624
 625         public void TestIntMin() {
 626                 int a = 1;
 627                 int b = 2;
 628
 629                 Assert(a == Math.Min(a, b));
 630                 Assert(a == Math.Min(b, a));
 631         }
 632
 633         public void TestLongMin() {
 634                 long a = 1L;
 635                 long b = 2L;
 636
 637                 Assert(a == Math.Min(a, b));
 638                 Assert(a == Math.Min(b, a));
 639         }
 640
 641         public void TestSbyteMin() {
 642                 sbyte a = 1;
 643                 sbyte b = 2;
 644
 645                 Assert(a == Math.Min(a, b));
 646                 Assert(a == Math.Min(b, a));
 647         }
 648
 649         public void TestShortMin() {
 650                 short a = 1;
 651                 short b = 2;
 652
 653                 Assert(a == Math.Min(a, b));
 654                 Assert(a == Math.Min(b, a));
 655         }
 656
 657         public void TestUintMin() {
 658                 uint a = 1U;
 659                 uint b = 2U;
 660
 661                 Assert(a == Math.Min(a, b));
 662                 Assert(a == Math.Min(b, a));
 663         }
 664
 665         public void TestUlongMin() {
 666                 ulong a = 1UL;
 667                 ulong b = 2UL;
 668
 669                 Assert(a == Math.Min(a, b));
 670                 Assert(a == Math.Min(b, a));
 671         }
 672
 673         public void TestUshortMin() {
 674                 ushort a = 1;
 675                 ushort b = 2;
 676
 677                 Assert(a == Math.Min(a, b));
 678                 Assert(a == Math.Min(b, a));
 679         }
 680
 681         public void TestDecimalRound() {
 682                 decimal a = 1.5M;
 683                 decimal b = 2.5M;
 684
 685                 Assert(Math.Round(a) + " != 2", Math.Round(a) == 2);
 686                 Assert(Math.Round(b) + " != 2", Math.Round(b) == 2);
 687                 Assert(Decimal.MaxValue == Math.Round(Decimal.MaxValue));
 688                 Assert(Decimal.MinValue == Math.Round(Decimal.MinValue));
 689         }
 690
 691         public void TestDecimalRound2() {
 692                 decimal a = 3.45M;
 693                 decimal b = 3.46M;
 694
 695                 AssertEquals ("Should round down", Math.Round(a, 1), 3.4M);
 696                 AssertEquals ("Should round up", Math.Round(b, 1), 3.5M);
 697         }
 698
 699         public void TestDoubleRound() {
 700                 double a = 1.5D;
 701                 double b = 2.5D;
 702
 703                 AssertEquals ("Should round up", Math.Round(a), 2D);
 704                 AssertEquals ("Should round down", Math.Round(b), 2D);
 705                 Assert(Double.MaxValue == Math.Round(Double.MaxValue));
 706                 Assert(Double.MinValue == Math.Round(Double.MinValue));
 707         }
 708
 709         public void TestDoubleRound2() {
 710                 double a = 3.45D;
 711                 double b = 3.46D;
 712
 713                 AssertEquals ("Should round down", Math.Round(a, 1), 3.4D);
 714                 AssertEquals ("Should round up", Math.Round(b, 1), 3.5D);
 715         }
 716
 717         public void TestDecimalSign() {
 718                 decimal a = -5M;
 719                 decimal b = 5M;
 720
 721                 Assert(Math.Sign(a) == -1);
 722                 Assert(Math.Sign(b) == 1);
 723                 Assert(Math.Sign(0M) == 0);
 724         }
 725
 726         public void TestDoubleSign() {
 727                 double a = -5D;
 728                 double b = 5D;
 729
 730                 Assert(Math.Sign(a) == -1);
 731                 Assert(Math.Sign(b) == 1);
 732                 Assert(Math.Sign(0D) == 0);
 733         }
 734
 735         public void TestFloatSign() {
 736                 float a = -5F;
 737                 float b = 5F;
 738
 739                 Assert(Math.Sign(a) == -1);
 740                 Assert(Math.Sign(b) == 1);
 741                 Assert(Math.Sign(0F) == 0);
 742         }
 743
 744         public void TestIntSign() {
 745                 int a = -5;
 746                 int b = 5;
 747
 748                 Assert(Math.Sign(a) == -1);
 749                 Assert(Math.Sign(b) == 1);
 750                 Assert(Math.Sign(0) == 0);
 751         }
 752
 753         public void TestLongSign() {
 754                 long a = -5L;
 755                 long b = 5L;
 756
 757                 Assert(Math.Sign(a) == -1);
 758                 Assert(Math.Sign(b) == 1);
 759                 Assert(Math.Sign(0L) == 0);
 760         }
 761
 762         public void TestSbyteSign() {
 763                 sbyte a = -5;
 764                 sbyte b = 5;
 765
 766                 Assert(Math.Sign(a) == -1);
 767                 Assert(Math.Sign(b) == 1);
 768                 Assert(Math.Sign(0) == 0);
 769         }
 770
 771         public void TestShortSign() {
 772                 short a = -5;
 773                 short b = 5;
 774
 775                 Assert(Math.Sign(a) == -1);
 776                 Assert(Math.Sign(b) == 1);
 777                 Assert(Math.Sign(0) == 0);
 778         }
 779
 780 }
 781
 782 }