1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one or more 3 * contributor license agreements. See the NOTICE file distributed with 4 * this work for additional information regarding copyright ownership. 5 * The ASF licenses this file to You under the Apache License, Version 2.0 6 * (the "License"); you may not use this file except in compliance with 7 * the License. You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 */ 17 18 package android.core; 19 20 import junit.framework.TestCase; 21 import android.test.suitebuilder.annotation.SmallTest; 22 import android.test.suitebuilder.annotation.MediumTest; 23 24 public class StrictMathTest extends TestCase { 25 26 private final double HYP = StrictMath.sqrt(2.0); 27 28 private final double OPP = 1.0; 29 30 private final double ADJ = 1.0; 31 32 /* Required to make previous preprocessor flags work - do not remove */ 33 int unused = 0; 34 35 /** 36 * @tests java.lang.StrictMath#abs(double) 37 */ 38 @SmallTest 39 public void testAbsD() { 40 // Test for method double java.lang.StrictMath.abs(double) 41 42 assertTrue("Incorrect double abs value", 43 (StrictMath.abs(-1908.8976) == 1908.8976)); 44 assertTrue("Incorrect double abs value", 45 (StrictMath.abs(1908.8976) == 1908.8976)); 46 } 47 48 /** 49 * @tests java.lang.StrictMath#abs(float) 50 */ 51 @SmallTest 52 public void testAbsF() { 53 // Test for method float java.lang.StrictMath.abs(float) 54 assertTrue("Incorrect float abs value", 55 (StrictMath.abs(-1908.8976f) == 1908.8976f)); 56 assertTrue("Incorrect float abs value", 57 (StrictMath.abs(1908.8976f) == 1908.8976f)); 58 } 59 60 /** 61 * @tests java.lang.StrictMath#abs(int) 62 */ 63 @SmallTest 64 public void testAbsI() { 65 // Test for method int java.lang.StrictMath.abs(int) 66 assertTrue("Incorrect int abs value", 67 (StrictMath.abs(-1908897) == 1908897)); 68 assertTrue("Incorrect int abs value", 69 (StrictMath.abs(1908897) == 1908897)); 70 } 71 72 /** 73 * @tests java.lang.StrictMath#abs(long) 74 */ 75 @SmallTest 76 public void testAbsJ() { 77 // Test for method long java.lang.StrictMath.abs(long) 78 assertTrue("Incorrect long abs value", (StrictMath 79 .abs(-19088976000089L) == 19088976000089L)); 80 assertTrue("Incorrect long abs value", 81 (StrictMath.abs(19088976000089L) == 19088976000089L)); 82 } 83 84 /** 85 * @tests java.lang.StrictMath#acos(double) 86 */ 87 @SmallTest 88 public void testAcosD() { 89 // Test for method double java.lang.StrictMath.acos(double) 90 assertTrue("Returned incorrect arc cosine", StrictMath.cos(StrictMath 91 .acos(ADJ / HYP)) == ADJ / HYP); 92 } 93 94 /** 95 * @tests java.lang.StrictMath#asin(double) 96 */ 97 @SmallTest 98 public void testAsinD() { 99 // Test for method double java.lang.StrictMath.asin(double) 100 assertTrue("Returned incorrect arc sine", StrictMath.sin(StrictMath 101 .asin(OPP / HYP)) == OPP / HYP); 102 } 103 104 /** 105 * @tests java.lang.StrictMath#atan(double) 106 */ 107 @SmallTest 108 public void testAtanD() { 109 // Test for method double java.lang.StrictMath.atan(double) 110 double answer = StrictMath.tan(StrictMath.atan(1.0)); 111 assertTrue("Returned incorrect arc tangent: " + answer, answer <= 1.0 112 && answer >= 9.9999999999999983E-1); 113 } 114 115 /** 116 * @tests java.lang.StrictMath#atan2(double,double) 117 */ 118 @SmallTest 119 public void testAtan2DD() { 120 // Test for method double java.lang.StrictMath.atan2(double, double) 121 double answer = StrictMath.atan(StrictMath.tan(1.0)); 122 assertTrue("Returned incorrect arc tangent: " + answer, answer <= 1.0 123 && answer >= 9.9999999999999983E-1); 124 } 125 126 /** 127 * @tests java.lang.StrictMath#cbrt(double) 128 */ 129 @SuppressWarnings("boxing") 130 @SmallTest 131 public void testCbrtD() { 132 // Test for special situations 133 assertTrue("Should return Double.NaN", Double.isNaN(StrictMath 134 .cbrt(Double.NaN))); 135 assertEquals("Should return Double.POSITIVE_INFINITY", 136 Double.POSITIVE_INFINITY, StrictMath 137 .cbrt(Double.POSITIVE_INFINITY)); 138 assertEquals("Should return Double.NEGATIVE_INFINITY", 139 Double.NEGATIVE_INFINITY, StrictMath 140 .cbrt(Double.NEGATIVE_INFINITY)); 141 assertEquals(Double.doubleToLongBits(0.0), Double 142 .doubleToLongBits(StrictMath.cbrt(0.0))); 143 assertEquals(Double.doubleToLongBits(+0.0), Double 144 .doubleToLongBits(StrictMath.cbrt(+0.0))); 145 assertEquals(Double.doubleToLongBits(-0.0), Double 146 .doubleToLongBits(StrictMath.cbrt(-0.0))); 147 148 assertEquals("Should return 3.0", 3.0, StrictMath.cbrt(27.0)); 149 assertEquals("Should return 23.111993172558684", 23.111993172558684, 150 StrictMath.cbrt(12345.6)); 151 assertEquals("Should return 5.643803094122362E102", 152 5.643803094122362E102, StrictMath.cbrt(Double.MAX_VALUE)); 153 assertEquals("Should return 0.01", 0.01, StrictMath.cbrt(0.000001)); 154 155 assertEquals("Should return -3.0", -3.0, StrictMath.cbrt(-27.0)); 156 assertEquals("Should return -23.111993172558684", -23.111993172558684, 157 StrictMath.cbrt(-12345.6)); 158 assertEquals("Should return 1.7031839360032603E-108", 159 1.7031839360032603E-108, StrictMath.cbrt(Double.MIN_VALUE)); 160 assertEquals("Should return -0.01", -0.01, StrictMath.cbrt(-0.000001)); 161 162 try { 163 StrictMath.cbrt((Double) null); 164 fail("Should throw NullPointerException"); 165 } catch (NullPointerException e) { 166 //expected 167 } 168 } 169 170 /** 171 * @tests java.lang.StrictMath#ceil(double) 172 */ 173 @SmallTest 174 public void testCeilD() { 175 // Test for method double java.lang.StrictMath.ceil(double) 176 assertEquals("Incorrect ceiling for double", 177 79, StrictMath.ceil(78.89), 0.0); 178 assertEquals("Incorrect ceiling for double", 179 -78, StrictMath.ceil(-78.89), 0.0); 180 } 181 182 /** 183 * @tests java.lang.StrictMath#cos(double) 184 */ 185 @SmallTest 186 public void testCosD() { 187 // Test for method double java.lang.StrictMath.cos(double) 188 189 assertTrue("Returned incorrect cosine", StrictMath.cos(StrictMath 190 .acos(ADJ / HYP)) == ADJ / HYP); 191 } 192 193 /** 194 * @tests java.lang.StrictMath#cosh(double) 195 */ 196 @SuppressWarnings("boxing") 197 @SmallTest 198 public void testCosh_D() { 199 // Test for special situations 200 assertTrue("Should return NaN", Double.isNaN(StrictMath 201 .cosh(Double.NaN))); 202 assertEquals("Should return POSITIVE_INFINITY", 203 Double.POSITIVE_INFINITY, StrictMath 204 .cosh(Double.POSITIVE_INFINITY)); 205 assertEquals("Should return POSITIVE_INFINITY", 206 Double.POSITIVE_INFINITY, StrictMath 207 .cosh(Double.NEGATIVE_INFINITY)); 208 assertEquals("Should return 1.0", 1.0, StrictMath.cosh(+0.0)); 209 assertEquals("Should return 1.0", 1.0, StrictMath.cosh(-0.0)); 210 211 assertEquals("Should return POSITIVE_INFINITY", 212 Double.POSITIVE_INFINITY, StrictMath.cosh(1234.56)); 213 assertEquals("Should return POSITIVE_INFINITY", 214 Double.POSITIVE_INFINITY, StrictMath.cosh(-1234.56)); 215 assertEquals("Should return 1.0000000000005", 1.0000000000005, 216 StrictMath.cosh(0.000001)); 217 assertEquals("Should return 1.0000000000005", 1.0000000000005, 218 StrictMath.cosh(-0.000001)); 219 assertEquals("Should return 5.212214351945598", 5.212214351945598, 220 StrictMath.cosh(2.33482)); 221 222 assertEquals("Should return POSITIVE_INFINITY", 223 Double.POSITIVE_INFINITY, StrictMath.cosh(Double.MAX_VALUE)); 224 assertEquals("Should return 1.0", 1.0, StrictMath 225 .cosh(Double.MIN_VALUE)); 226 } 227 228 /** 229 * @tests java.lang.StrictMath#exp(double) 230 */ 231 @SmallTest 232 public void testExpD() { 233 // Test for method double java.lang.StrictMath.exp(double) 234 assertTrue("Incorrect answer returned for simple power", StrictMath 235 .abs(StrictMath.exp(4D) - StrictMath.E * StrictMath.E 236 * StrictMath.E * StrictMath.E) < 0.1D); 237 assertTrue("Incorrect answer returned for larger power", StrictMath 238 .log(StrictMath.abs(StrictMath.exp(5.5D)) - 5.5D) < 10.0D); 239 } 240 241 /** 242 * @tests java.lang.StrictMath#expm1(double) 243 */ 244 @SuppressWarnings("boxing") 245 @SmallTest 246 public void testExpm1D() { 247 //Test for special cases 248 assertTrue("Should return NaN", Double.isNaN(StrictMath.expm1(Double.NaN))); 249 assertEquals("Should return POSITIVE_INFINITY", 250 Double.POSITIVE_INFINITY, StrictMath.expm1(Double.POSITIVE_INFINITY)); 251 assertEquals("Should return -1.0", -1.0, StrictMath 252 .expm1(Double.NEGATIVE_INFINITY)); 253 assertEquals(Double.doubleToLongBits(0.0), Double 254 .doubleToLongBits(StrictMath.expm1(0.0))); 255 assertEquals(Double.doubleToLongBits(+0.0), Double 256 .doubleToLongBits(StrictMath.expm1(+0.0))); 257 assertEquals(Double.doubleToLongBits(-0.0), Double 258 .doubleToLongBits(StrictMath.expm1(-0.0))); 259 260 assertEquals("Should return -9.999950000166666E-6", 261 -9.999950000166666E-6, StrictMath.expm1(-0.00001)); 262 assertEquals("Should return 1.0145103074469635E60", 263 1.0145103074469635E60, StrictMath.expm1(138.16951162)); 264 assertEquals("Should return POSITIVE_INFINITY", 265 Double.POSITIVE_INFINITY, StrictMath 266 .expm1(123456789123456789123456789.4521584223)); 267 assertEquals("Should return POSITIVE_INFINITY", 268 Double.POSITIVE_INFINITY, StrictMath.expm1(Double.MAX_VALUE)); 269 assertEquals("Should return MIN_VALUE", Double.MIN_VALUE, StrictMath 270 .expm1(Double.MIN_VALUE)); 271 272 } 273 274 /** 275 * @tests java.lang.StrictMath#floor(double) 276 */ 277 @SmallTest 278 public void testFloorD() { 279 // Test for method double java.lang.StrictMath.floor(double) 280 assertEquals("Incorrect floor for double", 281 78, StrictMath.floor(78.89), 0.0); 282 assertEquals("Incorrect floor for double", 283 -79, StrictMath.floor(-78.89), 0.0); 284 } 285 286 /** 287 * @tests java.lang.StrictMath#hypot(double,double) 288 */ 289 @SuppressWarnings("boxing") 290 @SmallTest 291 public void testHypotDD() { 292 // Test for special cases 293 assertEquals("Should return POSITIVE_INFINITY", 294 Double.POSITIVE_INFINITY, StrictMath.hypot(Double.POSITIVE_INFINITY, 295 1.0)); 296 assertEquals("Should return POSITIVE_INFINITY", 297 Double.POSITIVE_INFINITY, StrictMath.hypot(Double.NEGATIVE_INFINITY, 298 123.324)); 299 assertEquals("Should return POSITIVE_INFINITY", 300 Double.POSITIVE_INFINITY, StrictMath.hypot(-758.2587, 301 Double.POSITIVE_INFINITY)); 302 assertEquals("Should return POSITIVE_INFINITY", 303 Double.POSITIVE_INFINITY, StrictMath.hypot(5687.21, 304 Double.NEGATIVE_INFINITY)); 305 assertEquals("Should return POSITIVE_INFINITY", 306 Double.POSITIVE_INFINITY, StrictMath.hypot(Double.POSITIVE_INFINITY, 307 Double.NEGATIVE_INFINITY)); 308 assertEquals("Should return POSITIVE_INFINITY", 309 Double.POSITIVE_INFINITY, StrictMath.hypot(Double.NEGATIVE_INFINITY, 310 Double.POSITIVE_INFINITY)); 311 assertTrue("Should return NaN", Double.isNaN(StrictMath.hypot(Double.NaN, 312 2342301.89843))); 313 assertTrue("Should return NaN", Double.isNaN(StrictMath.hypot(-345.2680, 314 Double.NaN))); 315 316 assertEquals("Should return 2396424.905416697", 2396424.905416697, StrictMath 317 .hypot(12322.12, -2396393.2258)); 318 assertEquals("Should return 138.16958070558556", 138.16958070558556, 319 StrictMath.hypot(-138.16951162, 0.13817035864)); 320 assertEquals("Should return 1.7976931348623157E308", 321 1.7976931348623157E308, StrictMath.hypot(Double.MAX_VALUE, 211370.35)); 322 assertEquals("Should return 5413.7185", 5413.7185, StrictMath.hypot( 323 -5413.7185, Double.MIN_VALUE)); 324 325 } 326 327 /** 328 * @tests java.lang.StrictMath#IEEEremainder(double,double) 329 */ 330 @SmallTest 331 public void testIEEEremainderDD() { 332 // Test for method double java.lang.StrictMath.IEEEremainder(double, 333 // double) 334 assertEquals("Incorrect remainder returned", 0.0, StrictMath.IEEEremainder( 335 1.0, 1.0), 0.0); 336 assertTrue( 337 "Incorrect remainder returned", 338 StrictMath.IEEEremainder(1.32, 89.765) >= 1.4705063220631647E-2 339 || StrictMath.IEEEremainder(1.32, 89.765) >= 1.4705063220631649E-2); 340 } 341 342 /** 343 * @tests java.lang.StrictMath#log(double) 344 */ 345 @SmallTest 346 public void testLogD() { 347 // Test for method double java.lang.StrictMath.log(double) 348 for (double d = 10; d >= -10; d -= 0.5) { 349 double answer = StrictMath.log(StrictMath.exp(d)); 350 assertTrue("Answer does not equal expected answer for d = " + d 351 + " answer = " + answer, 352 StrictMath.abs(answer - d) <= StrictMath 353 .abs(d * 0.00000001)); 354 } 355 } 356 357 /** 358 * @tests java.lang.StrictMath#log10(double) 359 */ 360 @SuppressWarnings("boxing") 361 @SmallTest 362 public void testLog10D() { 363 // Test for special cases 364 assertTrue("Should return NaN", Double.isNaN(StrictMath 365 .log10(Double.NaN))); 366 assertTrue("Should return NaN", Double.isNaN(StrictMath 367 .log10(-2541.05745687234187532))); 368 assertEquals("Should return POSITIVE_INFINITY", 369 Double.POSITIVE_INFINITY, StrictMath 370 .log10(Double.POSITIVE_INFINITY)); 371 assertEquals("Should return NEGATIVE_INFINITY", 372 Double.NEGATIVE_INFINITY, StrictMath.log10(0.0)); 373 assertEquals("Should return NEGATIVE_INFINITY", 374 Double.NEGATIVE_INFINITY, StrictMath.log10(+0.0)); 375 assertEquals("Should return NEGATIVE_INFINITY", 376 Double.NEGATIVE_INFINITY, StrictMath.log10(-0.0)); 377 assertEquals("Should return 14.0", 14.0, StrictMath.log10(StrictMath 378 .pow(10, 14))); 379 380 assertEquals("Should return 3.7389561269540406", 3.7389561269540406, 381 StrictMath.log10(5482.2158)); 382 assertEquals("Should return 14.661551142893833", 14.661551142893833, 383 StrictMath.log10(458723662312872.125782332587)); 384 assertEquals("Should return -0.9083828622192334", -0.9083828622192334, 385 StrictMath.log10(0.12348583358871)); 386 assertEquals("Should return 308.25471555991675", 308.25471555991675, 387 StrictMath.log10(Double.MAX_VALUE)); 388 assertEquals("Should return -323.3062153431158", -323.3062153431158, 389 StrictMath.log10(Double.MIN_VALUE)); 390 } 391 392 /** 393 * @tests java.lang.StrictMath#log1p(double) 394 */ 395 @SuppressWarnings("boxing") 396 @SmallTest 397 public void testLog1pD() { 398 // Test for special cases 399 assertTrue("Should return NaN", Double.isNaN(StrictMath 400 .log1p(Double.NaN))); 401 assertTrue("Should return NaN", Double.isNaN(StrictMath 402 .log1p(-32.0482175))); 403 assertEquals("Should return POSITIVE_INFINITY", 404 Double.POSITIVE_INFINITY, StrictMath 405 .log1p(Double.POSITIVE_INFINITY)); 406 assertEquals(Double.doubleToLongBits(0.0), Double 407 .doubleToLongBits(StrictMath.log1p(0.0))); 408 assertEquals(Double.doubleToLongBits(+0.0), Double 409 .doubleToLongBits(StrictMath.log1p(+0.0))); 410 assertEquals(Double.doubleToLongBits(-0.0), Double 411 .doubleToLongBits(StrictMath.log1p(-0.0))); 412 413 assertEquals("Should return -0.2941782295312541", -0.2941782295312541, 414 StrictMath.log1p(-0.254856327)); 415 assertEquals("Should return 7.368050685564151", 7.368050685564151, 416 StrictMath.log1p(1583.542)); 417 assertEquals("Should return 0.4633708685409921", 0.4633708685409921, 418 StrictMath.log1p(0.5894227)); 419 assertEquals("Should return 709.782712893384", 709.782712893384, 420 StrictMath.log1p(Double.MAX_VALUE)); 421 assertEquals("Should return Double.MIN_VALUE", Double.MIN_VALUE, 422 StrictMath.log1p(Double.MIN_VALUE)); 423 } 424 425 /** 426 * @tests java.lang.StrictMath#max(double,double) 427 */ 428 @SmallTest 429 public void testMaxDD() { 430 // Test for method double java.lang.StrictMath.max(double, double) 431 assertEquals("Incorrect double max value", 1908897.6000089, StrictMath.max( 432 -1908897.6000089, 1908897.6000089), 0D); 433 assertEquals("Incorrect double max value", 1908897.6000089, StrictMath.max(2.0, 434 1908897.6000089), 0D); 435 assertEquals("Incorrect double max value", -2.0, StrictMath.max(-2.0, 436 -1908897.6000089), 0D); 437 438 } 439 440 /** 441 * @tests java.lang.StrictMath#max(float,float) 442 */ 443 @SmallTest 444 public void testMaxFF() { 445 // Test for method float java.lang.StrictMath.max(float, float) 446 assertTrue("Incorrect float max value", StrictMath.max(-1908897.600f, 447 1908897.600f) == 1908897.600f); 448 assertTrue("Incorrect float max value", StrictMath.max(2.0f, 449 1908897.600f) == 1908897.600f); 450 assertTrue("Incorrect float max value", StrictMath.max(-2.0f, 451 -1908897.600f) == -2.0f); 452 } 453 454 /** 455 * @tests java.lang.StrictMath#max(int,int) 456 */ 457 @SmallTest 458 public void testMaxII() { 459 // Test for method int java.lang.StrictMath.max(int, int) 460 assertEquals("Incorrect int max value", 19088976, StrictMath.max(-19088976, 461 19088976)); 462 assertEquals("Incorrect int max value", 463 19088976, StrictMath.max(20, 19088976)); 464 assertEquals("Incorrect int max value", 465 -20, StrictMath.max(-20, -19088976)); 466 } 467 468 /** 469 * @tests java.lang.StrictMath#max(long,long) 470 */ 471 @SmallTest 472 public void testMaxJJ() { 473 // Test for method long java.lang.StrictMath.max(long, long) 474 assertEquals("Incorrect long max value", 19088976000089L, StrictMath.max(-19088976000089L, 475 19088976000089L)); 476 assertEquals("Incorrect long max value", 19088976000089L, StrictMath.max(20, 477 19088976000089L)); 478 assertEquals("Incorrect long max value", -20, StrictMath.max(-20, 479 -19088976000089L)); 480 } 481 482 /** 483 * @tests java.lang.StrictMath#min(double,double) 484 */ 485 @SmallTest 486 public void testMinDD() { 487 // Test for method double java.lang.StrictMath.min(double, double) 488 assertEquals("Incorrect double min value", -1908897.6000089, StrictMath.min( 489 -1908897.6000089, 1908897.6000089), 0D); 490 assertEquals("Incorrect double min value", 2.0, StrictMath.min(2.0, 491 1908897.6000089), 0D); 492 assertEquals("Incorrect double min value", -1908897.6000089, StrictMath.min(-2.0, 493 -1908897.6000089), 0D); 494 } 495 496 /** 497 * @tests java.lang.StrictMath#min(float,float) 498 */ 499 @SmallTest 500 public void testMinFF() { 501 // Test for method float java.lang.StrictMath.min(float, float) 502 assertTrue("Incorrect float min value", StrictMath.min(-1908897.600f, 503 1908897.600f) == -1908897.600f); 504 assertTrue("Incorrect float min value", StrictMath.min(2.0f, 505 1908897.600f) == 2.0f); 506 assertTrue("Incorrect float min value", StrictMath.min(-2.0f, 507 -1908897.600f) == -1908897.600f); 508 } 509 510 /** 511 * @tests java.lang.StrictMath#min(int,int) 512 */ 513 @SmallTest 514 public void testMinII() { 515 // Test for method int java.lang.StrictMath.min(int, int) 516 assertEquals("Incorrect int min value", -19088976, StrictMath.min(-19088976, 517 19088976)); 518 assertEquals("Incorrect int min value", 519 20, StrictMath.min(20, 19088976)); 520 assertEquals("Incorrect int min value", 521 -19088976, StrictMath.min(-20, -19088976)); 522 523 } 524 525 /** 526 * @tests java.lang.StrictMath#min(long,long) 527 */ 528 @SmallTest 529 public void testMinJJ() { 530 // Test for method long java.lang.StrictMath.min(long, long) 531 assertEquals("Incorrect long min value", -19088976000089L, StrictMath.min(-19088976000089L, 532 19088976000089L)); 533 assertEquals("Incorrect long min value", 20, StrictMath.min(20, 534 19088976000089L)); 535 assertEquals("Incorrect long min value", -19088976000089L, StrictMath.min(-20, 536 -19088976000089L)); 537 } 538 539 /** 540 * @tests java.lang.StrictMath#pow(double,double) 541 */ 542 @SmallTest 543 public void testPowDD() { 544 // Test for method double java.lang.StrictMath.pow(double, double) 545 assertTrue("pow returned incorrect value", 546 (long) StrictMath.pow(2, 8) == 256l); 547 assertTrue("pow returned incorrect value", 548 StrictMath.pow(2, -8) == 0.00390625d); 549 } 550 551 /** 552 * @tests java.lang.StrictMath#rint(double) 553 */ 554 @SmallTest 555 public void testRintD() { 556 // Test for method double java.lang.StrictMath.rint(double) 557 assertEquals("Failed to round properly - up to odd", 558 3.0, StrictMath.rint(2.9), 0D); 559 assertTrue("Failed to round properly - NaN", Double.isNaN(StrictMath 560 .rint(Double.NaN))); 561 assertEquals("Failed to round properly down to even", 2.0, StrictMath 562 .rint(2.1), 0D); 563 assertTrue("Failed to round properly " + 2.5 + " to even", StrictMath 564 .rint(2.5) == 2.0); 565 } 566 567 /** 568 * @tests java.lang.StrictMath#round(double) 569 */ 570 @SmallTest 571 public void testRoundD() { 572 // Test for method long java.lang.StrictMath.round(double) 573 assertEquals("Incorrect rounding of a float", 574 -91, StrictMath.round(-90.89d)); 575 } 576 577 /** 578 * @tests java.lang.StrictMath#round(float) 579 */ 580 @SmallTest 581 public void testRoundF() { 582 // Test for method int java.lang.StrictMath.round(float) 583 assertEquals("Incorrect rounding of a float", 584 -91, StrictMath.round(-90.89f)); 585 } 586 587 /** 588 * @tests java.lang.StrictMath#signum(double) 589 */ 590 @SmallTest 591 public void testSignumD() { 592 assertTrue(Double.isNaN(StrictMath.signum(Double.NaN))); 593 assertEquals(Double.doubleToLongBits(0.0), Double 594 .doubleToLongBits(StrictMath.signum(0.0))); 595 assertEquals(Double.doubleToLongBits(+0.0), Double 596 .doubleToLongBits(StrictMath.signum(+0.0))); 597 assertEquals(Double.doubleToLongBits(-0.0), Double 598 .doubleToLongBits(StrictMath.signum(-0.0))); 599 600 assertEquals(1.0, StrictMath.signum(253681.2187962), 0D); 601 assertEquals(-1.0, StrictMath.signum(-125874693.56), 0D); 602 assertEquals(1.0, StrictMath.signum(1.2587E-308), 0D); 603 assertEquals(-1.0, StrictMath.signum(-1.2587E-308), 0D); 604 605 assertEquals(1.0, StrictMath.signum(Double.MAX_VALUE), 0D); 606 assertEquals(1.0, StrictMath.signum(Double.MIN_VALUE), 0D); 607 assertEquals(-1.0, StrictMath.signum(-Double.MAX_VALUE), 0D); 608 assertEquals(-1.0, StrictMath.signum(-Double.MIN_VALUE), 0D); 609 assertEquals(1.0, StrictMath.signum(Double.POSITIVE_INFINITY), 0D); 610 assertEquals(-1.0, StrictMath.signum(Double.NEGATIVE_INFINITY), 0D); 611 612 } 613 614 /** 615 * @tests java.lang.StrictMath#signum(float) 616 */ 617 @SmallTest 618 public void testSignumF() { 619 assertTrue(Float.isNaN(StrictMath.signum(Float.NaN))); 620 assertEquals(Float.floatToIntBits(0.0f), Float 621 .floatToIntBits(StrictMath.signum(0.0f))); 622 assertEquals(Float.floatToIntBits(+0.0f), Float 623 .floatToIntBits(StrictMath.signum(+0.0f))); 624 assertEquals(Float.floatToIntBits(-0.0f), Float 625 .floatToIntBits(StrictMath.signum(-0.0f))); 626 627 assertEquals(1.0f, StrictMath.signum(253681.2187962f), 0f); 628 assertEquals(-1.0f, StrictMath.signum(-125874693.56f), 0f); 629 assertEquals(1.0f, StrictMath.signum(1.2587E-11f), 0f); 630 assertEquals(-1.0f, StrictMath.signum(-1.2587E-11f), 0f); 631 632 assertEquals(1.0f, StrictMath.signum(Float.MAX_VALUE), 0f); 633 assertEquals(1.0f, StrictMath.signum(Float.MIN_VALUE), 0f); 634 assertEquals(-1.0f, StrictMath.signum(-Float.MAX_VALUE), 0f); 635 assertEquals(-1.0f, StrictMath.signum(-Float.MIN_VALUE), 0f); 636 assertEquals(1.0f, StrictMath.signum(Float.POSITIVE_INFINITY), 0f); 637 assertEquals(-1.0f, StrictMath.signum(Float.NEGATIVE_INFINITY), 0f); 638 } 639 640 /** 641 * @tests java.lang.StrictMath#sin(double) 642 */ 643 @SmallTest 644 public void testSinD() { 645 // Test for method double java.lang.StrictMath.sin(double) 646 assertTrue("Returned incorrect sine", StrictMath.sin(StrictMath 647 .asin(OPP / HYP)) == OPP / HYP); 648 } 649 650 /** 651 * @tests java.lang.StrictMath#sinh(double) 652 */ 653 @SmallTest 654 public void testSinhD() { 655 // Test for special situations 656 assertTrue(Double.isNaN(StrictMath.sinh(Double.NaN))); 657 assertEquals("Should return POSITIVE_INFINITY", 658 Double.POSITIVE_INFINITY, StrictMath 659 .sinh(Double.POSITIVE_INFINITY), 0D); 660 assertEquals("Should return NEGATIVE_INFINITY", 661 Double.NEGATIVE_INFINITY, StrictMath 662 .sinh(Double.NEGATIVE_INFINITY), 0D); 663 assertEquals(Double.doubleToLongBits(0.0), Double 664 .doubleToLongBits(StrictMath.sinh(0.0))); 665 assertEquals(Double.doubleToLongBits(+0.0), Double 666 .doubleToLongBits(StrictMath.sinh(+0.0))); 667 assertEquals(Double.doubleToLongBits(-0.0), Double 668 .doubleToLongBits(StrictMath.sinh(-0.0))); 669 670 assertEquals("Should return POSITIVE_INFINITY", 671 Double.POSITIVE_INFINITY, StrictMath.sinh(1234.56), 0D); 672 assertEquals("Should return NEGATIVE_INFINITY", 673 Double.NEGATIVE_INFINITY, StrictMath.sinh(-1234.56), 0D); 674 assertEquals("Should return 1.0000000000001666E-6", 675 1.0000000000001666E-6, StrictMath.sinh(0.000001), 0D); 676 assertEquals("Should return -1.0000000000001666E-6", 677 -1.0000000000001666E-6, StrictMath.sinh(-0.000001), 0D); 678 assertEquals("Should return 5.115386441963859", 5.115386441963859, 679 StrictMath.sinh(2.33482), 0D); 680 assertEquals("Should return POSITIVE_INFINITY", 681 Double.POSITIVE_INFINITY, StrictMath.sinh(Double.MAX_VALUE), 0D); 682 assertEquals("Should return 4.9E-324", 4.9E-324, StrictMath 683 .sinh(Double.MIN_VALUE), 0D); 684 } 685 686 /** 687 * @tests java.lang.StrictMath#sqrt(double) 688 */ 689 @SmallTest 690 public void testSqrtD() { 691 // Test for method double java.lang.StrictMath.sqrt(double) 692 assertEquals("Incorrect root returned1", 693 2, StrictMath.sqrt(StrictMath.pow(StrictMath.sqrt(2), 4)), 0.0); 694 assertEquals("Incorrect root returned2", 7, StrictMath.sqrt(49), 0.0); 695 } 696 697 /** 698 * @tests java.lang.StrictMath#tan(double) 699 */ 700 @SmallTest 701 public void testTanD() { 702 // Test for method double java.lang.StrictMath.tan(double) 703 assertTrue( 704 "Returned incorrect tangent: ", 705 StrictMath.tan(StrictMath.atan(1.0)) <= 1.0 706 || StrictMath.tan(StrictMath.atan(1.0)) >= 9.9999999999999983E-1); 707 } 708 709 /** 710 * @tests java.lang.StrictMath#tanh(double) 711 */ 712 @SmallTest 713 public void testTanhD() { 714 // Test for special situations 715 assertTrue(Double.isNaN(StrictMath.tanh(Double.NaN))); 716 assertEquals("Should return +1.0", +1.0, StrictMath 717 .tanh(Double.POSITIVE_INFINITY), 0D); 718 assertEquals("Should return -1.0", -1.0, StrictMath 719 .tanh(Double.NEGATIVE_INFINITY), 0D); 720 assertEquals(Double.doubleToLongBits(0.0), Double 721 .doubleToLongBits(StrictMath.tanh(0.0))); 722 assertEquals(Double.doubleToLongBits(+0.0), Double 723 .doubleToLongBits(StrictMath.tanh(+0.0))); 724 assertEquals(Double.doubleToLongBits(-0.0), Double 725 .doubleToLongBits(StrictMath.tanh(-0.0))); 726 727 assertEquals("Should return 1.0", 1.0, StrictMath.tanh(1234.56), 0D); 728 assertEquals("Should return -1.0", -1.0, StrictMath.tanh(-1234.56), 0D); 729 assertEquals("Should return 9.999999999996666E-7", 730 9.999999999996666E-7, StrictMath.tanh(0.000001), 0D); 731 assertEquals("Should return 0.981422884124941", 0.981422884124941, 732 StrictMath.tanh(2.33482), 0D); 733 assertEquals("Should return 1.0", 1.0, StrictMath 734 .tanh(Double.MAX_VALUE), 0D); 735 assertEquals("Should return 4.9E-324", 4.9E-324, StrictMath 736 .tanh(Double.MIN_VALUE), 0D); 737 } 738 739 /** 740 * @tests java.lang.StrictMath#random() 741 */ 742 @MediumTest 743 public void testRandom() { 744 // There isn't a place for these tests so just stick them here 745 assertEquals("Wrong value E", 746 4613303445314885481L, Double.doubleToLongBits(StrictMath.E)); 747 assertEquals("Wrong value PI", 748 4614256656552045848L, Double.doubleToLongBits(StrictMath.PI)); 749 750 for (int i = 500; i >= 0; i--) { 751 double d = StrictMath.random(); 752 assertTrue("Generated number is out of range: " + d, d >= 0.0 753 && d < 1.0); 754 } 755 } 756 757 /** 758 * @tests java.lang.StrictMath#toRadians(double) 759 */ 760 @MediumTest 761 public void testToRadiansD() { 762 for (double d = 500; d >= 0; d -= 1.0) { 763 double converted = StrictMath.toDegrees(StrictMath.toRadians(d)); 764 assertTrue("Converted number not equal to original. d = " + d, 765 converted >= d * 0.99999999 && converted <= d * 1.00000001); 766 } 767 } 768 769 /** 770 * @tests java.lang.StrictMath#toDegrees(double) 771 */ 772 @MediumTest 773 public void testToDegreesD() { 774 for (double d = 500; d >= 0; d -= 1.0) { 775 double converted = StrictMath.toRadians(StrictMath.toDegrees(d)); 776 assertTrue("Converted number not equal to original. d = " + d, 777 converted >= d * 0.99999999 && converted <= d * 1.00000001); 778 } 779 } 780 781 /** 782 * @tests java.lang.StrictMath#ulp(double) 783 */ 784 @SuppressWarnings("boxing") 785 @SmallTest 786 public void testUlp_D() { 787 // Test for special cases 788 assertTrue("Should return NaN", Double 789 .isNaN(StrictMath.ulp(Double.NaN))); 790 assertEquals("Returned incorrect value", Double.POSITIVE_INFINITY, 791 StrictMath.ulp(Double.POSITIVE_INFINITY), 0D); 792 assertEquals("Returned incorrect value", Double.POSITIVE_INFINITY, 793 StrictMath.ulp(Double.NEGATIVE_INFINITY), 0D); 794 assertEquals("Returned incorrect value", Double.MIN_VALUE, StrictMath 795 .ulp(0.0), 0D); 796 assertEquals("Returned incorrect value", Double.MIN_VALUE, StrictMath 797 .ulp(+0.0), 0D); 798 assertEquals("Returned incorrect value", Double.MIN_VALUE, StrictMath 799 .ulp(-0.0), 0D); 800 assertEquals("Returned incorrect value", StrictMath.pow(2, 971), 801 StrictMath.ulp(Double.MAX_VALUE), 0D); 802 assertEquals("Returned incorrect value", StrictMath.pow(2, 971), 803 StrictMath.ulp(-Double.MAX_VALUE), 0D); 804 805 assertEquals("Returned incorrect value", Double.MIN_VALUE, StrictMath 806 .ulp(Double.MIN_VALUE), 0D); 807 assertEquals("Returned incorrect value", Double.MIN_VALUE, StrictMath 808 .ulp(-Double.MIN_VALUE), 0D); 809 810 assertEquals("Returned incorrect value", 2.220446049250313E-16, 811 StrictMath.ulp(1.0), 0D); 812 assertEquals("Returned incorrect value", 2.220446049250313E-16, 813 StrictMath.ulp(-1.0), 0D); 814 assertEquals("Returned incorrect value", 2.2737367544323206E-13, 815 StrictMath.ulp(1153.0), 0D); 816 } 817 818 /** 819 * @tests java.lang.StrictMath#ulp(float) 820 */ 821 @SuppressWarnings("boxing") 822 @SmallTest 823 public void testUlpF() { 824 // Test for special cases 825 assertTrue("Should return NaN", Float.isNaN(StrictMath.ulp(Float.NaN))); 826 assertEquals("Returned incorrect value", Float.POSITIVE_INFINITY, 827 StrictMath.ulp(Float.POSITIVE_INFINITY), 0f); 828 assertEquals("Returned incorrect value", Float.POSITIVE_INFINITY, 829 StrictMath.ulp(Float.NEGATIVE_INFINITY), 0f); 830 assertEquals("Returned incorrect value", Float.MIN_VALUE, StrictMath 831 .ulp(0.0f), 0f); 832 assertEquals("Returned incorrect value", Float.MIN_VALUE, StrictMath 833 .ulp(+0.0f), 0f); 834 assertEquals("Returned incorrect value", Float.MIN_VALUE, StrictMath 835 .ulp(-0.0f), 0f); 836 assertEquals("Returned incorrect value", 2.028241E31f, StrictMath 837 .ulp(Float.MAX_VALUE), 0f); 838 assertEquals("Returned incorrect value", 2.028241E31f, StrictMath 839 .ulp(-Float.MAX_VALUE), 0f); 840 841 assertEquals("Returned incorrect value", 1.4E-45f, StrictMath 842 .ulp(Float.MIN_VALUE), 0f); 843 assertEquals("Returned incorrect value", 1.4E-45f, StrictMath 844 .ulp(-Float.MIN_VALUE), 0f); 845 846 assertEquals("Returned incorrect value", 1.1920929E-7f, StrictMath 847 .ulp(1.0f), 0f); 848 assertEquals("Returned incorrect value", 1.1920929E-7f, StrictMath 849 .ulp(-1.0f), 0f); 850 assertEquals("Returned incorrect value", 1.2207031E-4f, StrictMath 851 .ulp(1153.0f), 0f); 852 assertEquals("Returned incorrect value", 5.6E-45f, Math 853 .ulp(9.403954E-38f), 0f); 854 } 855 } 856
