1 /* 2 * Copyright (C) 2008 The Guava Authors 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.google.common.primitives; 18 19 import static com.google.common.truth.Truth.assertThat; 20 import static java.lang.Double.NaN; 21 22 import com.google.common.annotations.GwtCompatible; 23 import com.google.common.annotations.GwtIncompatible; 24 import com.google.common.base.Converter; 25 import com.google.common.collect.ImmutableList; 26 import com.google.common.collect.testing.Helpers; 27 import com.google.common.testing.NullPointerTester; 28 import com.google.common.testing.SerializableTester; 29 import java.util.Arrays; 30 import java.util.Collection; 31 import java.util.Collections; 32 import java.util.Comparator; 33 import java.util.List; 34 import java.util.regex.Pattern; 35 import junit.framework.TestCase; 36 37 /** 38 * Unit test for {@link Doubles}. 39 * 40 * @author Kevin Bourrillion 41 */ 42 @GwtCompatible(emulated = true) 43 @SuppressWarnings("cast") // redundant casts are intentional and harmless 44 public class DoublesTest extends TestCase { 45 private static final double[] EMPTY = {}; 46 private static final double[] ARRAY1 = {(double) 1}; 47 private static final double[] ARRAY234 = {(double) 2, (double) 3, (double) 4}; 48 49 private static final double LEAST = Double.NEGATIVE_INFINITY; 50 private static final double GREATEST = Double.POSITIVE_INFINITY; 51 52 private static final double[] NUMBERS = 53 new double[] { 54 LEAST, 55 -Double.MAX_VALUE, 56 -1.0, 57 -0.5, 58 -0.1, 59 -0.0, 60 0.0, 61 0.1, 62 0.5, 63 1.0, 64 Double.MAX_VALUE, 65 GREATEST, 66 Double.MIN_NORMAL, 67 -Double.MIN_NORMAL, 68 Double.MIN_VALUE, 69 -Double.MIN_VALUE, 70 Integer.MIN_VALUE, 71 Integer.MAX_VALUE, 72 Long.MIN_VALUE, 73 Long.MAX_VALUE 74 }; 75 76 private static final double[] VALUES = Doubles.concat(NUMBERS, new double[] {NaN}); 77 testHashCode()78 public void testHashCode() { 79 for (double value : VALUES) { 80 assertEquals(((Double) value).hashCode(), Doubles.hashCode(value)); 81 } 82 } 83 testIsFinite()84 public void testIsFinite() { 85 for (double value : NUMBERS) { 86 assertEquals(!(Double.isNaN(value) || Double.isInfinite(value)), Doubles.isFinite(value)); 87 } 88 } 89 testCompare()90 public void testCompare() { 91 for (double x : VALUES) { 92 for (double y : VALUES) { 93 // note: spec requires only that the sign is the same 94 assertEquals(x + ", " + y, Double.valueOf(x).compareTo(y), Doubles.compare(x, y)); 95 } 96 } 97 } 98 testContains()99 public void testContains() { 100 assertFalse(Doubles.contains(EMPTY, (double) 1)); 101 assertFalse(Doubles.contains(ARRAY1, (double) 2)); 102 assertFalse(Doubles.contains(ARRAY234, (double) 1)); 103 assertTrue(Doubles.contains(new double[] {(double) -1}, (double) -1)); 104 assertTrue(Doubles.contains(ARRAY234, (double) 2)); 105 assertTrue(Doubles.contains(ARRAY234, (double) 3)); 106 assertTrue(Doubles.contains(ARRAY234, (double) 4)); 107 108 for (double value : NUMBERS) { 109 assertTrue("" + value, Doubles.contains(new double[] {5.0, value}, value)); 110 } 111 assertFalse(Doubles.contains(new double[] {5.0, NaN}, NaN)); 112 } 113 testIndexOf()114 public void testIndexOf() { 115 assertEquals(-1, Doubles.indexOf(EMPTY, (double) 1)); 116 assertEquals(-1, Doubles.indexOf(ARRAY1, (double) 2)); 117 assertEquals(-1, Doubles.indexOf(ARRAY234, (double) 1)); 118 assertEquals(0, Doubles.indexOf(new double[] {(double) -1}, (double) -1)); 119 assertEquals(0, Doubles.indexOf(ARRAY234, (double) 2)); 120 assertEquals(1, Doubles.indexOf(ARRAY234, (double) 3)); 121 assertEquals(2, Doubles.indexOf(ARRAY234, (double) 4)); 122 assertEquals( 123 1, 124 Doubles.indexOf(new double[] {(double) 2, (double) 3, (double) 2, (double) 3}, (double) 3)); 125 126 for (double value : NUMBERS) { 127 assertEquals("" + value, 1, Doubles.indexOf(new double[] {5.0, value}, value)); 128 } 129 assertEquals(-1, Doubles.indexOf(new double[] {5.0, NaN}, NaN)); 130 } 131 testIndexOf_arrayTarget()132 public void testIndexOf_arrayTarget() { 133 assertEquals(0, Doubles.indexOf(EMPTY, EMPTY)); 134 assertEquals(0, Doubles.indexOf(ARRAY234, EMPTY)); 135 assertEquals(-1, Doubles.indexOf(EMPTY, ARRAY234)); 136 assertEquals(-1, Doubles.indexOf(ARRAY234, ARRAY1)); 137 assertEquals(-1, Doubles.indexOf(ARRAY1, ARRAY234)); 138 assertEquals(0, Doubles.indexOf(ARRAY1, ARRAY1)); 139 assertEquals(0, Doubles.indexOf(ARRAY234, ARRAY234)); 140 assertEquals(0, Doubles.indexOf(ARRAY234, new double[] {(double) 2, (double) 3})); 141 assertEquals(1, Doubles.indexOf(ARRAY234, new double[] {(double) 3, (double) 4})); 142 assertEquals(1, Doubles.indexOf(ARRAY234, new double[] {(double) 3})); 143 assertEquals(2, Doubles.indexOf(ARRAY234, new double[] {(double) 4})); 144 assertEquals( 145 1, 146 Doubles.indexOf( 147 new double[] {(double) 2, (double) 3, (double) 3, (double) 3, (double) 3}, 148 new double[] {(double) 3})); 149 assertEquals( 150 2, 151 Doubles.indexOf( 152 new double[] { 153 (double) 2, (double) 3, (double) 2, (double) 3, (double) 4, (double) 2, (double) 3 154 }, 155 new double[] {(double) 2, (double) 3, (double) 4})); 156 assertEquals( 157 1, 158 Doubles.indexOf( 159 new double[] { 160 (double) 2, (double) 2, (double) 3, (double) 4, (double) 2, (double) 3, (double) 4 161 }, 162 new double[] {(double) 2, (double) 3, (double) 4})); 163 assertEquals( 164 -1, 165 Doubles.indexOf( 166 new double[] {(double) 4, (double) 3, (double) 2}, 167 new double[] {(double) 2, (double) 3, (double) 4})); 168 169 for (double value : NUMBERS) { 170 assertEquals( 171 "" + value, 172 1, 173 Doubles.indexOf(new double[] {5.0, value, value, 5.0}, new double[] {value, value})); 174 } 175 assertEquals(-1, Doubles.indexOf(new double[] {5.0, NaN, NaN, 5.0}, new double[] {NaN, NaN})); 176 } 177 testLastIndexOf()178 public void testLastIndexOf() { 179 assertEquals(-1, Doubles.lastIndexOf(EMPTY, (double) 1)); 180 assertEquals(-1, Doubles.lastIndexOf(ARRAY1, (double) 2)); 181 assertEquals(-1, Doubles.lastIndexOf(ARRAY234, (double) 1)); 182 assertEquals(0, Doubles.lastIndexOf(new double[] {(double) -1}, (double) -1)); 183 assertEquals(0, Doubles.lastIndexOf(ARRAY234, (double) 2)); 184 assertEquals(1, Doubles.lastIndexOf(ARRAY234, (double) 3)); 185 assertEquals(2, Doubles.lastIndexOf(ARRAY234, (double) 4)); 186 assertEquals( 187 3, 188 Doubles.lastIndexOf( 189 new double[] {(double) 2, (double) 3, (double) 2, (double) 3}, (double) 3)); 190 191 for (double value : NUMBERS) { 192 assertEquals("" + value, 0, Doubles.lastIndexOf(new double[] {value, 5.0}, value)); 193 } 194 assertEquals(-1, Doubles.lastIndexOf(new double[] {NaN, 5.0}, NaN)); 195 } 196 197 @GwtIncompatible testMax_noArgs()198 public void testMax_noArgs() { 199 try { 200 Doubles.max(); 201 fail(); 202 } catch (IllegalArgumentException expected) { 203 } 204 } 205 testMax()206 public void testMax() { 207 assertEquals(LEAST, Doubles.max(LEAST)); 208 assertEquals(GREATEST, Doubles.max(GREATEST)); 209 assertEquals( 210 (double) 9, 211 Doubles.max( 212 (double) 8, (double) 6, (double) 7, (double) 5, (double) 3, (double) 0, (double) 9)); 213 214 assertEquals(0.0, Doubles.max(-0.0, 0.0)); 215 assertEquals(0.0, Doubles.max(0.0, -0.0)); 216 assertEquals(GREATEST, Doubles.max(NUMBERS)); 217 assertTrue(Double.isNaN(Doubles.max(VALUES))); 218 } 219 220 @GwtIncompatible testMin_noArgs()221 public void testMin_noArgs() { 222 try { 223 Doubles.min(); 224 fail(); 225 } catch (IllegalArgumentException expected) { 226 } 227 } 228 testMin()229 public void testMin() { 230 assertEquals(LEAST, Doubles.min(LEAST)); 231 assertEquals(GREATEST, Doubles.min(GREATEST)); 232 assertEquals( 233 (double) 0, 234 Doubles.min( 235 (double) 8, (double) 6, (double) 7, (double) 5, (double) 3, (double) 0, (double) 9)); 236 237 assertEquals(-0.0, Doubles.min(-0.0, 0.0)); 238 assertEquals(-0.0, Doubles.min(0.0, -0.0)); 239 assertEquals(LEAST, Doubles.min(NUMBERS)); 240 assertTrue(Double.isNaN(Doubles.min(VALUES))); 241 } 242 testConstrainToRange()243 public void testConstrainToRange() { 244 double tolerance = 1e-10; 245 assertEquals( 246 (double) 1, Doubles.constrainToRange((double) 1, (double) 0, (double) 5), tolerance); 247 assertEquals( 248 (double) 1, Doubles.constrainToRange((double) 1, (double) 1, (double) 5), tolerance); 249 assertEquals( 250 (double) 3, Doubles.constrainToRange((double) 1, (double) 3, (double) 5), tolerance); 251 assertEquals( 252 (double) -1, Doubles.constrainToRange((double) 0, (double) -5, (double) -1), tolerance); 253 assertEquals( 254 (double) 2, Doubles.constrainToRange((double) 5, (double) 2, (double) 2), tolerance); 255 try { 256 Doubles.constrainToRange((double) 1, (double) 3, (double) 2); 257 fail(); 258 } catch (IllegalArgumentException expected) { 259 } 260 } 261 testConcat()262 public void testConcat() { 263 assertTrue(Arrays.equals(EMPTY, Doubles.concat())); 264 assertTrue(Arrays.equals(EMPTY, Doubles.concat(EMPTY))); 265 assertTrue(Arrays.equals(EMPTY, Doubles.concat(EMPTY, EMPTY, EMPTY))); 266 assertTrue(Arrays.equals(ARRAY1, Doubles.concat(ARRAY1))); 267 assertNotSame(ARRAY1, Doubles.concat(ARRAY1)); 268 assertTrue(Arrays.equals(ARRAY1, Doubles.concat(EMPTY, ARRAY1, EMPTY))); 269 assertTrue( 270 Arrays.equals( 271 new double[] {(double) 1, (double) 1, (double) 1}, 272 Doubles.concat(ARRAY1, ARRAY1, ARRAY1))); 273 assertTrue( 274 Arrays.equals( 275 new double[] {(double) 1, (double) 2, (double) 3, (double) 4}, 276 Doubles.concat(ARRAY1, ARRAY234))); 277 } 278 testEnsureCapacity()279 public void testEnsureCapacity() { 280 assertSame(EMPTY, Doubles.ensureCapacity(EMPTY, 0, 1)); 281 assertSame(ARRAY1, Doubles.ensureCapacity(ARRAY1, 0, 1)); 282 assertSame(ARRAY1, Doubles.ensureCapacity(ARRAY1, 1, 1)); 283 assertTrue( 284 Arrays.equals( 285 new double[] {(double) 1, (double) 0, (double) 0}, 286 Doubles.ensureCapacity(ARRAY1, 2, 1))); 287 } 288 testEnsureCapacity_fail()289 public void testEnsureCapacity_fail() { 290 try { 291 Doubles.ensureCapacity(ARRAY1, -1, 1); 292 fail(); 293 } catch (IllegalArgumentException expected) { 294 } 295 try { 296 // notice that this should even fail when no growth was needed 297 Doubles.ensureCapacity(ARRAY1, 1, -1); 298 fail(); 299 } catch (IllegalArgumentException expected) { 300 } 301 } 302 303 @GwtIncompatible // Double.toString returns different value in GWT. testJoin()304 public void testJoin() { 305 assertEquals("", Doubles.join(",", EMPTY)); 306 assertEquals("1.0", Doubles.join(",", ARRAY1)); 307 assertEquals("1.0,2.0", Doubles.join(",", (double) 1, (double) 2)); 308 assertEquals("1.02.03.0", Doubles.join("", (double) 1, (double) 2, (double) 3)); 309 } 310 testJoinNonTrivialDoubles()311 public void testJoinNonTrivialDoubles() { 312 assertEquals("", Doubles.join(",", EMPTY)); 313 assertEquals("1.2", Doubles.join(",", 1.2)); 314 assertEquals("1.3,2.4", Doubles.join(",", 1.3, 2.4)); 315 assertEquals("1.42.53.6", Doubles.join("", 1.4, 2.5, 3.6)); 316 } 317 testLexicographicalComparator()318 public void testLexicographicalComparator() { 319 List<double[]> ordered = 320 Arrays.asList( 321 new double[] {}, 322 new double[] {LEAST}, 323 new double[] {LEAST, LEAST}, 324 new double[] {LEAST, (double) 1}, 325 new double[] {(double) 1}, 326 new double[] {(double) 1, LEAST}, 327 new double[] {GREATEST, Double.MAX_VALUE}, 328 new double[] {GREATEST, GREATEST}, 329 new double[] {GREATEST, GREATEST, GREATEST}); 330 331 Comparator<double[]> comparator = Doubles.lexicographicalComparator(); 332 Helpers.testComparator(comparator, ordered); 333 } 334 testReverse()335 public void testReverse() { 336 testReverse(new double[] {}, new double[] {}); 337 testReverse(new double[] {1}, new double[] {1}); 338 testReverse(new double[] {1, 2}, new double[] {2, 1}); 339 testReverse(new double[] {3, 1, 1}, new double[] {1, 1, 3}); 340 testReverse(new double[] {-1, 1, -2, 2}, new double[] {2, -2, 1, -1}); 341 } 342 testReverse(double[] input, double[] expectedOutput)343 private static void testReverse(double[] input, double[] expectedOutput) { 344 input = Arrays.copyOf(input, input.length); 345 Doubles.reverse(input); 346 assertTrue(Arrays.equals(expectedOutput, input)); 347 } 348 testReverse( double[] input, int fromIndex, int toIndex, double[] expectedOutput)349 private static void testReverse( 350 double[] input, int fromIndex, int toIndex, double[] expectedOutput) { 351 input = Arrays.copyOf(input, input.length); 352 Doubles.reverse(input, fromIndex, toIndex); 353 assertTrue(Arrays.equals(expectedOutput, input)); 354 } 355 testReverseIndexed()356 public void testReverseIndexed() { 357 testReverse(new double[] {}, 0, 0, new double[] {}); 358 testReverse(new double[] {1}, 0, 1, new double[] {1}); 359 testReverse(new double[] {1, 2}, 0, 2, new double[] {2, 1}); 360 testReverse(new double[] {3, 1, 1}, 0, 2, new double[] {1, 3, 1}); 361 testReverse(new double[] {3, 1, 1}, 0, 1, new double[] {3, 1, 1}); 362 testReverse(new double[] {-1, 1, -2, 2}, 1, 3, new double[] {-1, -2, 1, 2}); 363 } 364 testSortDescending()365 public void testSortDescending() { 366 testSortDescending(new double[] {}, new double[] {}); 367 testSortDescending(new double[] {1}, new double[] {1}); 368 testSortDescending(new double[] {1, 2}, new double[] {2, 1}); 369 testSortDescending(new double[] {1, 3, 1}, new double[] {3, 1, 1}); 370 testSortDescending(new double[] {-1, 1, -2, 2}, new double[] {2, 1, -1, -2}); 371 testSortDescending( 372 new double[] {-1, 1, Double.NaN, -2, -0, 0, 2}, 373 new double[] {Double.NaN, 2, 1, 0, -0, -1, -2}); 374 } 375 testSortDescending(double[] input, double[] expectedOutput)376 private static void testSortDescending(double[] input, double[] expectedOutput) { 377 input = Arrays.copyOf(input, input.length); 378 Doubles.sortDescending(input); 379 // GWT's Arrays.equals doesn't appear to handle NaN correctly, so test each element individually 380 for (int i = 0; i < input.length; i++) { 381 assertEquals(0, Double.compare(expectedOutput[i], input[i])); 382 } 383 } 384 testSortDescending( double[] input, int fromIndex, int toIndex, double[] expectedOutput)385 private static void testSortDescending( 386 double[] input, int fromIndex, int toIndex, double[] expectedOutput) { 387 input = Arrays.copyOf(input, input.length); 388 Doubles.sortDescending(input, fromIndex, toIndex); 389 // GWT's Arrays.equals doesn't appear to handle NaN correctly, so test each element individually 390 for (int i = 0; i < input.length; i++) { 391 assertEquals(0, Double.compare(expectedOutput[i], input[i])); 392 } 393 } 394 testSortDescendingIndexed()395 public void testSortDescendingIndexed() { 396 testSortDescending(new double[] {}, 0, 0, new double[] {}); 397 testSortDescending(new double[] {1}, 0, 1, new double[] {1}); 398 testSortDescending(new double[] {1, 2}, 0, 2, new double[] {2, 1}); 399 testSortDescending(new double[] {1, 3, 1}, 0, 2, new double[] {3, 1, 1}); 400 testSortDescending(new double[] {1, 3, 1}, 0, 1, new double[] {1, 3, 1}); 401 testSortDescending(new double[] {-1, -2, 1, 2}, 1, 3, new double[] {-1, 1, -2, 2}); 402 testSortDescending( 403 new double[] {-1, 1, Double.NaN, -2, 2}, 1, 4, new double[] {-1, Double.NaN, 1, -2, 2}); 404 } 405 406 @GwtIncompatible // SerializableTester testLexicographicalComparatorSerializable()407 public void testLexicographicalComparatorSerializable() { 408 Comparator<double[]> comparator = Doubles.lexicographicalComparator(); 409 assertSame(comparator, SerializableTester.reserialize(comparator)); 410 } 411 412 @GwtIncompatible // SerializableTester testStringConverterSerialization()413 public void testStringConverterSerialization() { 414 SerializableTester.reserializeAndAssert(Doubles.stringConverter()); 415 } 416 testToArray()417 public void testToArray() { 418 // need explicit type parameter to avoid javac warning!? 419 List<Double> none = Arrays.<Double>asList(); 420 assertTrue(Arrays.equals(EMPTY, Doubles.toArray(none))); 421 422 List<Double> one = Arrays.asList((double) 1); 423 assertTrue(Arrays.equals(ARRAY1, Doubles.toArray(one))); 424 425 double[] array = {(double) 0, (double) 1, Math.PI}; 426 427 List<Double> three = Arrays.asList((double) 0, (double) 1, Math.PI); 428 assertTrue(Arrays.equals(array, Doubles.toArray(three))); 429 430 assertTrue(Arrays.equals(array, Doubles.toArray(Doubles.asList(array)))); 431 } 432 testToArray_threadSafe()433 public void testToArray_threadSafe() { 434 for (int delta : new int[] {+1, 0, -1}) { 435 for (int i = 0; i < VALUES.length; i++) { 436 List<Double> list = Doubles.asList(VALUES).subList(0, i); 437 Collection<Double> misleadingSize = Helpers.misleadingSizeCollection(delta); 438 misleadingSize.addAll(list); 439 double[] arr = Doubles.toArray(misleadingSize); 440 assertEquals(i, arr.length); 441 for (int j = 0; j < i; j++) { 442 assertEquals(VALUES[j], arr[j]); 443 } 444 } 445 } 446 } 447 testToArray_withNull()448 public void testToArray_withNull() { 449 List<Double> list = Arrays.asList((double) 0, (double) 1, null); 450 try { 451 Doubles.toArray(list); 452 fail(); 453 } catch (NullPointerException expected) { 454 } 455 } 456 testToArray_withConversion()457 public void testToArray_withConversion() { 458 double[] array = {(double) 0, (double) 1, (double) 2}; 459 460 List<Byte> bytes = Arrays.asList((byte) 0, (byte) 1, (byte) 2); 461 List<Short> shorts = Arrays.asList((short) 0, (short) 1, (short) 2); 462 List<Integer> ints = Arrays.asList(0, 1, 2); 463 List<Float> floats = Arrays.asList((float) 0, (float) 1, (float) 2); 464 List<Long> longs = Arrays.asList((long) 0, (long) 1, (long) 2); 465 List<Double> doubles = Arrays.asList((double) 0, (double) 1, (double) 2); 466 467 assertTrue(Arrays.equals(array, Doubles.toArray(bytes))); 468 assertTrue(Arrays.equals(array, Doubles.toArray(shorts))); 469 assertTrue(Arrays.equals(array, Doubles.toArray(ints))); 470 assertTrue(Arrays.equals(array, Doubles.toArray(floats))); 471 assertTrue(Arrays.equals(array, Doubles.toArray(longs))); 472 assertTrue(Arrays.equals(array, Doubles.toArray(doubles))); 473 } 474 testAsList_isAView()475 public void testAsList_isAView() { 476 double[] array = {(double) 0, (double) 1}; 477 List<Double> list = Doubles.asList(array); 478 list.set(0, (double) 2); 479 assertTrue(Arrays.equals(new double[] {(double) 2, (double) 1}, array)); 480 array[1] = (double) 3; 481 assertThat(list).containsExactly((double) 2, (double) 3).inOrder(); 482 } 483 testAsList_toArray_roundTrip()484 public void testAsList_toArray_roundTrip() { 485 double[] array = {(double) 0, (double) 1, (double) 2}; 486 List<Double> list = Doubles.asList(array); 487 double[] newArray = Doubles.toArray(list); 488 489 // Make sure it returned a copy 490 list.set(0, (double) 4); 491 assertTrue(Arrays.equals(new double[] {(double) 0, (double) 1, (double) 2}, newArray)); 492 newArray[1] = (double) 5; 493 assertEquals((double) 1, (double) list.get(1)); 494 } 495 496 // This test stems from a real bug found by andrewk testAsList_subList_toArray_roundTrip()497 public void testAsList_subList_toArray_roundTrip() { 498 double[] array = {(double) 0, (double) 1, (double) 2, (double) 3}; 499 List<Double> list = Doubles.asList(array); 500 assertTrue( 501 Arrays.equals(new double[] {(double) 1, (double) 2}, Doubles.toArray(list.subList(1, 3)))); 502 assertTrue(Arrays.equals(new double[] {}, Doubles.toArray(list.subList(2, 2)))); 503 } 504 testAsListEmpty()505 public void testAsListEmpty() { 506 assertSame(Collections.emptyList(), Doubles.asList(EMPTY)); 507 } 508 509 /** 510 * A reference implementation for {@code tryParse} that just catches the exception from {@link 511 * Double#valueOf}. 512 */ referenceTryParse(String input)513 private static Double referenceTryParse(String input) { 514 if (input.trim().length() < input.length()) { 515 return null; 516 } 517 try { 518 return Double.valueOf(input); 519 } catch (NumberFormatException e) { 520 return null; 521 } 522 } 523 524 @GwtIncompatible // Doubles.tryParse checkTryParse(String input)525 private static void checkTryParse(String input) { 526 Double expected = referenceTryParse(input); 527 assertEquals(expected, Doubles.tryParse(input)); 528 if (expected != null && !Doubles.FLOATING_POINT_PATTERN.matcher(input).matches()) { 529 // TODO(cpovirk): Use SourceCodeEscapers if it is added to Guava. 530 StringBuilder escapedInput = new StringBuilder(); 531 for (char c : input.toCharArray()) { 532 if (c >= 0x20 && c <= 0x7E) { 533 escapedInput.append(c); 534 } else { 535 escapedInput.append(String.format("\\u%04x", (int) c)); 536 } 537 } 538 fail("FLOATING_POINT_PATTERN should have matched valid input <" + escapedInput + ">"); 539 } 540 } 541 542 @GwtIncompatible // Doubles.tryParse checkTryParse(double expected, String input)543 private static void checkTryParse(double expected, String input) { 544 assertEquals(Double.valueOf(expected), Doubles.tryParse(input)); 545 assertThat(input) 546 .matches( 547 Pattern.compile( 548 Doubles.FLOATING_POINT_PATTERN.pattern(), Doubles.FLOATING_POINT_PATTERN.flags())); 549 } 550 551 @GwtIncompatible // Doubles.tryParse testTryParseHex()552 public void testTryParseHex() { 553 for (String signChar : ImmutableList.of("", "+", "-")) { 554 for (String hexPrefix : ImmutableList.of("0x", "0X")) { 555 for (String iPart : ImmutableList.of("", "0", "1", "F", "f", "c4", "CE")) { 556 for (String fPart : ImmutableList.of("", ".", ".F", ".52", ".a")) { 557 for (String expMarker : ImmutableList.of("p", "P")) { 558 for (String exponent : ImmutableList.of("0", "-5", "+20", "52")) { 559 for (String typePart : ImmutableList.of("", "D", "F", "d", "f")) { 560 checkTryParse( 561 signChar + hexPrefix + iPart + fPart + expMarker + exponent + typePart); 562 } 563 } 564 } 565 } 566 } 567 } 568 } 569 } 570 571 @AndroidIncompatible // slow 572 @GwtIncompatible // Doubles.tryParse testTryParseAllCodePoints()573 public void testTryParseAllCodePoints() { 574 // Exercise non-ASCII digit test cases and the like. 575 char[] tmp = new char[2]; 576 for (int i = Character.MIN_CODE_POINT; i < Character.MAX_CODE_POINT; i++) { 577 Character.toChars(i, tmp, 0); 578 checkTryParse(String.copyValueOf(tmp, 0, Character.charCount(i))); 579 } 580 } 581 582 @GwtIncompatible // Doubles.tryParse testTryParseOfToStringIsOriginal()583 public void testTryParseOfToStringIsOriginal() { 584 for (double d : NUMBERS) { 585 checkTryParse(d, Double.toString(d)); 586 } 587 } 588 589 @GwtIncompatible // Doubles.tryParse testTryParseOfToHexStringIsOriginal()590 public void testTryParseOfToHexStringIsOriginal() { 591 for (double d : NUMBERS) { 592 checkTryParse(d, Double.toHexString(d)); 593 } 594 } 595 596 @GwtIncompatible // Doubles.tryParse testTryParseNaN()597 public void testTryParseNaN() { 598 checkTryParse("NaN"); 599 checkTryParse("+NaN"); 600 checkTryParse("-NaN"); 601 } 602 603 @GwtIncompatible // Doubles.tryParse testTryParseInfinity()604 public void testTryParseInfinity() { 605 checkTryParse(Double.POSITIVE_INFINITY, "Infinity"); 606 checkTryParse(Double.POSITIVE_INFINITY, "+Infinity"); 607 checkTryParse(Double.NEGATIVE_INFINITY, "-Infinity"); 608 } 609 610 private static final String[] BAD_TRY_PARSE_INPUTS = { 611 "", 612 "+-", 613 "+-0", 614 " 5", 615 "32 ", 616 " 55 ", 617 "infinity", 618 "POSITIVE_INFINITY", 619 "0x9A", 620 "0x9A.bE-5", 621 ".", 622 ".e5", 623 "NaNd", 624 "InfinityF" 625 }; 626 627 @GwtIncompatible // Doubles.tryParse testTryParseFailures()628 public void testTryParseFailures() { 629 for (String badInput : BAD_TRY_PARSE_INPUTS) { 630 assertThat(badInput) 631 .doesNotMatch( 632 Pattern.compile( 633 Doubles.FLOATING_POINT_PATTERN.pattern(), 634 Doubles.FLOATING_POINT_PATTERN.flags())); 635 assertEquals(referenceTryParse(badInput), Doubles.tryParse(badInput)); 636 assertNull(Doubles.tryParse(badInput)); 637 } 638 } 639 640 @GwtIncompatible // NullPointerTester testNulls()641 public void testNulls() { 642 new NullPointerTester().testAllPublicStaticMethods(Doubles.class); 643 } 644 testStringConverter_convert()645 public void testStringConverter_convert() { 646 Converter<String, Double> converter = Doubles.stringConverter(); 647 assertEquals((Double) 1.0, converter.convert("1.0")); 648 assertEquals((Double) 0.0, converter.convert("0.0")); 649 assertEquals((Double) (-1.0), converter.convert("-1.0")); 650 assertEquals((Double) 1.0, converter.convert("1")); 651 assertEquals((Double) 0.0, converter.convert("0")); 652 assertEquals((Double) (-1.0), converter.convert("-1")); 653 assertEquals((Double) 1e6, converter.convert("1e6")); 654 assertEquals((Double) 1e-6, converter.convert("1e-6")); 655 } 656 testStringConverter_convertError()657 public void testStringConverter_convertError() { 658 try { 659 Doubles.stringConverter().convert("notanumber"); 660 fail(); 661 } catch (NumberFormatException expected) { 662 } 663 } 664 testStringConverter_nullConversions()665 public void testStringConverter_nullConversions() { 666 assertNull(Doubles.stringConverter().convert(null)); 667 assertNull(Doubles.stringConverter().reverse().convert(null)); 668 } 669 670 @GwtIncompatible // Double.toString returns different value in GWT. testStringConverter_reverse()671 public void testStringConverter_reverse() { 672 Converter<String, Double> converter = Doubles.stringConverter(); 673 assertEquals("1.0", converter.reverse().convert(1.0)); 674 assertEquals("0.0", converter.reverse().convert(0.0)); 675 assertEquals("-1.0", converter.reverse().convert(-1.0)); 676 assertEquals("1000000.0", converter.reverse().convert(1e6)); 677 assertEquals("1.0E-6", converter.reverse().convert(1e-6)); 678 } 679 680 @GwtIncompatible // NullPointerTester testStringConverter_nullPointerTester()681 public void testStringConverter_nullPointerTester() throws Exception { 682 NullPointerTester tester = new NullPointerTester(); 683 tester.testAllPublicInstanceMethods(Doubles.stringConverter()); 684 } 685 686 @GwtIncompatible testTryParse_withNullNoGwt()687 public void testTryParse_withNullNoGwt() { 688 assertNull(Doubles.tryParse("null")); 689 try { 690 Doubles.tryParse(null); 691 fail("Expected NPE"); 692 } catch (NullPointerException expected) { 693 } 694 } 695 } 696