1 /* 2 * Copyright (c) 2012, 2014, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /* @test 25 * 26 * @bug 7131459 27 * @summary test various situations of NumberFormat rounding when close to tie 28 * @author Olivier Lagneau 29 * @run main TieRoundingTest 30 * 31 */ 32 33 import java.math.BigDecimal; 34 import java.math.BigInteger; 35 import java.text.NumberFormat; 36 import java.text.DecimalFormat; 37 import java.math.RoundingMode; 38 import java.util.Locale; 39 40 public class TieRoundingTest { 41 42 static int testCounter = 0; 43 static int errorCounter = 0; 44 static boolean allPassed = true; 45 46 static void formatOutputTestDouble(NumberFormat nf, 47 double doubleToTest, 48 String tiePosition, 49 String inputDigits, 50 String expectedOutput) { 51 52 int mfd = nf.getMaximumFractionDigits(); 53 RoundingMode rm = nf.getRoundingMode(); 54 String result = nf.format(doubleToTest); 55 56 if (!result.equals(expectedOutput)) { 57 System.out.println(); 58 System.out.println("========================================"); 59 System.out.println("***Error formatting double value from string : " + 60 inputDigits); 61 System.out.println("NumberFormat pattern is : " + 62 ((DecimalFormat ) nf).toPattern()); 63 System.out.println("Maximum number of fractional digits : " + mfd); 64 System.out.println("Fractional rounding digit : " + (mfd + 1)); 65 System.out.println("Position of value relative to tie : " + tiePosition); 66 System.out.println("Rounding Mode : " + rm); 67 System.out.println("BigDecimal output : " + 68 new BigDecimal(doubleToTest).toString()); 69 System.out.println("FloatingDecimal output : " + doubleToTest); 70 System.out.println( 71 "Error. Formatted result different from expected." + 72 "\nExpected output is : \"" + expectedOutput + "\"" + 73 "\nFormated output is : \"" + result + "\""); 74 System.out.println("========================================"); 75 System.out.println(); 76 77 errorCounter++; 78 allPassed = false; 79 } else { 80 testCounter++; 81 System.out.println("\nSuccess for double value : " + doubleToTest + " :"); 82 System.out.println(" Input digits :" + inputDigits + 83 ", BigDecimal value : " + 84 new BigDecimal(doubleToTest).toString()); 85 System.out.print(" Rounding mode: " + rm); 86 System.out.print(", fract digits : " + mfd); 87 System.out.print(", position : " + tiePosition + " tie"); 88 System.out.print(", result : " + result); 89 System.out.println(", expected : " + expectedOutput); 90 } 91 } 92 93 static void formatOutputTestLong(NumberFormat nf, 94 long longToTest, 95 String tiePosition, 96 String inputDigits, 97 String expectedOutput) { 98 99 int mfd = nf.getMaximumFractionDigits(); 100 RoundingMode rm = nf.getRoundingMode(); 101 String result = nf.format(longToTest); 102 103 if (!result.equals(expectedOutput)) { 104 System.out.println(); 105 System.out.println("========================================"); 106 System.out.println("***Error formatting double value from string : " + 107 inputDigits); 108 System.out.println("NumberFormat pattern is : " + 109 ((DecimalFormat ) nf).toPattern()); 110 System.out.println("Maximum number of fractional digits : " + mfd); 111 System.out.println("Fractional rounding digit : " + (mfd + 1)); 112 System.out.println("Position of value relative to tie : " + tiePosition); 113 System.out.println("Rounding Mode : " + rm); 114 System.out.println( 115 "Error. Formatted result different from expected." + 116 "\nExpected output is : \"" + expectedOutput + "\"" + 117 "\nFormated output is : \"" + result + "\""); 118 System.out.println("========================================"); 119 System.out.println(); 120 121 errorCounter++; 122 allPassed = false; 123 } else { 124 testCounter++; 125 System.out.print("Success. Long input :" + inputDigits); 126 System.out.print(", rounding : " + rm); 127 System.out.print(", fract digits : " + mfd); 128 System.out.print(", tie position : " + tiePosition); 129 System.out.println(", expected : " + expectedOutput); 130 131 } 132 } 133 134 static void formatOutputTestObject(NumberFormat nf, 135 Object someNumber, 136 String tiePosition, 137 String inputDigits, 138 String expectedOutput) { 139 140 int mfd = nf.getMaximumFractionDigits(); 141 RoundingMode rm = nf.getRoundingMode(); 142 String result = nf.format(someNumber); 143 144 if (!result.equals(expectedOutput)) { 145 System.out.println(); 146 System.out.println("========================================"); 147 System.out.println("***Error formatting number value from string : " + 148 inputDigits); 149 System.out.println("NumberFormat pattern is : " + 150 ((DecimalFormat ) nf).toPattern()); 151 System.out.println("Maximum number of fractional digits : " + mfd); 152 System.out.println("Fractional rounding digit : " + (mfd + 1)); 153 System.out.println("Position of value relative to tie : " + tiePosition); 154 System.out.println("Rounding Mode : " + rm); 155 System.out.println("Number self output representation: " + someNumber); 156 System.out.println( 157 "Error. Formatted result different from expected." + 158 "\nExpected output is : \"" + expectedOutput + "\"" + 159 "\nFormated output is : \"" + result + "\""); 160 System.out.println("========================================"); 161 System.out.println(); 162 163 errorCounter++; 164 allPassed = false; 165 } else { 166 testCounter++; 167 System.out.print("Success. Number input :" + inputDigits); 168 System.out.print(", rounding : " + rm); 169 System.out.print(", fract digits : " + mfd); 170 System.out.print(", tie position : " + tiePosition); 171 System.out.println(", expected : " + expectedOutput); 172 } 173 } 174 175 public static void main(String[] args) { 176 177 // Only the 3 rounding modes below may be impacted by bug 7131459. 178 // So we do not test the other rounding modes. 179 RoundingMode[] roundingModes = { 180 RoundingMode.HALF_DOWN, 181 RoundingMode.HALF_EVEN, 182 RoundingMode.HALF_UP 183 }; 184 185 // Precise the relative position of input value against its closest tie. 186 String[] tieRelativePositions = { 187 "below", "exact", "above", 188 "below", "exact", "above", 189 "below", "exact", "above", 190 "below", "above", "above", 191 "below", "below", "above", 192 "below", "exact", "above" 193 }; 194 195 // =============== Testing double (and thus float) value cases ========= 196 197 System.out.println("\n===== testing 3 digits rounding position ====="); 198 double[] values3FractDigits = { 199 // unimpacting values close to tie, with less than 3 input fract digits 200 1.115d, 1.125d, 1.135d, 201 // HALF_* impacting close to tie values covering all 6 tie cases 202 0.3115d, 0.3125d, 0.3135d, 203 0.6865d, 0.6875d, 0.6885d, 204 // specific HALF_UP close to tie values 205 0.3124d, 0.3126d, 0.3128d, 206 // specific HALF_DOWN close to tie values 207 0.6864d, 0.6865d, 0.6868d, 208 // unimpacting values close to tie, with more than 3 input fract digits 209 1.46885d, 2.46875d, 1.46865d 210 }; 211 212 String[] inputs3FractDigits = { 213 "1.115d", "1.125d", "1.135d", 214 "0.3115d", "0.3125d", "0.3135d", 215 "0.6865d", "0.6875d", "0.6885d", 216 "0.3124d", "0.3126d", "0.3128d", 217 "0.6864d", "0.6865d", "0.6868d", 218 "1.46885d", "2.46875d", "1.46865d" 219 }; 220 221 String[][] expected3FractDigits = { 222 {"1.115", "1.125", "1.135", 223 "0.311", "0.312", "0.314", 224 "0.686", "0.687", "0.689", 225 "0.312", "0.313", "0.313", 226 "0.686", "0.686", "0.687", 227 "1.469", "2.469", "1.469" 228 }, 229 {"1.115", "1.125", "1.135", 230 "0.311", "0.312", "0.314", 231 "0.686", "0.688", "0.689", 232 "0.312", "0.313", "0.313", 233 "0.686", "0.686", "0.687", 234 "1.469", "2.469", "1.469" 235 }, 236 {"1.115", "1.125", "1.135", 237 "0.311", "0.313", "0.314", 238 "0.686", "0.688", "0.689", 239 "0.312", "0.313", "0.313", 240 "0.686", "0.686", "0.687", 241 "1.469", "2.469", "1.469" 242 }, 243 }; 244 245 246 for (int r = 0; r < roundingModes.length; r++) { 247 NumberFormat dfDefault = NumberFormat.getInstance(Locale.US); 248 RoundingMode rmode = roundingModes[r]; 249 dfDefault.setRoundingMode(rmode); 250 System.out.println("\n----- Now checking " + rmode + 251 " rounding mode -----"); 252 253 for (int i = 0; i < values3FractDigits.length; i++) { 254 double d = values3FractDigits[i]; 255 String tiePosition = tieRelativePositions[i]; 256 String input = inputs3FractDigits[i]; 257 String expected = expected3FractDigits[r][i]; 258 259 formatOutputTestDouble(dfDefault, d, tiePosition, input, expected); 260 } 261 } 262 263 System.out.println("\n===== testing 5 digits rounding position ====="); 264 double[] values5FractDigits = { 265 // unimpacting values close to tie, with less than 5 input fract digits 266 1.3135d, 1.3125d, 1.3115d, 267 // HALF_* impacting values close to tie, covering all 6 cases 268 1.328115d, 1.328125d, 1.328135d, 269 1.796865d, 1.796875d, 1.796885d, 270 // specific HALF_UP close to tie values 271 1.328124d, 1.798876d, 1.796889d, 272 // specific HALF_DOWN close to tie values 273 1.328114d, 1.796865d, 1.328138d, 274 // unimpacting values close to tie, with more than 5 input fract digits 275 1.3281149999999d, 1.75390625d, 1.7968750000001d 276 }; 277 278 String[] inputs5FractDigits = { 279 "1.3135d", "1.3125d", "1.3115d", 280 "1.328115d", "1.328125d", "1.328135d", 281 "1.796865d", "1.796875d", "1.796885d", 282 "1.328124d", "1.798876d", "1.796889d", 283 "1.328114d", "1.796865d", "1.328138d", 284 "1.3281149999999d", "1.75390625d", "1.7968750000001d" 285 }; 286 287 String[][] expected5FractDigits = { 288 {"1.3135", "1.3125", "1.3115", 289 "1.32811", "1.32812", "1.32814", 290 "1.79686", "1.79687", "1.79689", 291 "1.32812", "1.79888", "1.79689", 292 "1.32811", "1.79686", "1.32814", 293 "1.32811", "1.75391", "1.79688" 294 }, 295 {"1.3135", "1.3125", "1.3115", 296 "1.32811", "1.32812", "1.32814", 297 "1.79686", "1.79688", "1.79689", 298 "1.32812", "1.79888", "1.79689", 299 "1.32811", "1.79686", "1.32814", 300 "1.32811", "1.75391", "1.79688" 301 }, 302 {"1.3135", "1.3125", "1.3115", 303 "1.32811", "1.32813", "1.32814", 304 "1.79686", "1.79688", "1.79689", 305 "1.32812", "1.79888", "1.79689", 306 "1.32811", "1.79686", "1.32814", 307 "1.32811", "1.75391", "1.79688" 308 } 309 }; 310 311 312 for (int r = 0; r < roundingModes.length; r++) { 313 DecimalFormat df5 = (DecimalFormat) NumberFormat.getInstance(Locale.US); 314 RoundingMode rmode = roundingModes[r]; 315 df5.setRoundingMode(rmode); 316 System.out.println("\n----- Now checking " + rmode + 317 " rounding mode -----"); 318 df5.applyPattern("#,###.#####"); 319 320 for (int i = 0; i < values5FractDigits.length; i++) { 321 double d = values5FractDigits[i]; 322 String tiePosition = tieRelativePositions[i]; 323 String input = inputs5FractDigits[i]; 324 String expected = expected5FractDigits[r][i]; 325 326 formatOutputTestDouble(df5, d, tiePosition, input, expected); 327 } 328 } 329 330 // ==================== Testing long value cases ==================== 331 332 System.out.println("\n===== testing long values ====="); 333 long l = 123456789012345L; 334 DecimalFormat dfLong = (DecimalFormat) NumberFormat.getInstance(Locale.US); 335 String tiePosition = "exact"; 336 String input = "123456789012345L"; 337 String expected = "123,456,789,012,345"; 338 String result = dfLong.format(l); 339 formatOutputTestLong(dfLong, l, tiePosition, input, expected); 340 341 dfLong.applyPattern("0.###E0"); 342 expected = "1.235E14"; 343 formatOutputTestLong(dfLong, l, tiePosition, input, expected); 344 345 l = 123450000000000L; 346 input = "123450000000000L"; 347 expected = "1.234E14"; 348 formatOutputTestLong(dfLong, l, tiePosition, input, expected); 349 350 l = 987750000000000L; 351 input = "987750000000000L"; 352 expected = "9.878E14"; 353 formatOutputTestLong(dfLong, l, tiePosition, input, expected); 354 355 dfLong.applyPattern("#,###.0E0"); 356 l = 987755000000000L; 357 input = "987755000000000L"; 358 expected = "987.76E12"; 359 360 formatOutputTestLong(dfLong, l, tiePosition, input, expected); 361 362 363 // ================= Testing BigInteger value cases ================= 364 365 System.out.println("\n===== testing BigInteger values ====="); 366 String stringValue = "12345678901234567890123456789012345"; 367 BigInteger bi = new BigInteger(stringValue); 368 DecimalFormat dfBig = (DecimalFormat) NumberFormat.getInstance(Locale.US); 369 tiePosition = "exact"; 370 input = stringValue; 371 expected = "12,345,678,901,234,567,890,123,456,789,012,345"; 372 formatOutputTestObject(dfBig, bi, tiePosition, input, expected); 373 374 dfBig.applyPattern("0.###E0"); 375 expected = "1.235E34"; 376 formatOutputTestObject(dfBig, bi, tiePosition, input, expected); 377 378 stringValue = "12345000000000000000000000000000000"; 379 input = stringValue; 380 bi = new BigInteger(stringValue); 381 expected = "1.234E34"; 382 formatOutputTestObject(dfBig, bi, tiePosition, input, expected); 383 384 stringValue = "12345000000000000000000000000000001"; 385 input = stringValue; 386 bi = new BigInteger(stringValue); 387 expected = "1.235E34"; 388 formatOutputTestObject(dfBig, bi, tiePosition, input, expected); 389 390 stringValue = "98755000000000000000000000000000000"; 391 input = stringValue; 392 bi = new BigInteger(stringValue); 393 expected = "9.876E34"; 394 formatOutputTestObject(dfBig, bi, tiePosition, input, expected); 395 396 dfLong.applyPattern("#,###.0E0"); 397 stringValue = "98775500000000000000000000000000000"; 398 input = stringValue; 399 expected = "987.76E34"; 400 401 // =============== Testing BigDecimal value cases ================ 402 403 System.out.println("\n===== testing BigDecimal values ====="); 404 dfBig = (DecimalFormat) NumberFormat.getInstance(Locale.US); 405 406 stringValue = "0.68850000000000000088817841970012523233890533447265625"; 407 BigDecimal bd = new BigDecimal(stringValue); 408 tiePosition = "exact"; 409 input = stringValue; 410 expected = "0.689"; 411 formatOutputTestObject(dfBig, bd, tiePosition, input, expected); 412 413 stringValue = "0.31149999999999999911182158029987476766109466552734375"; 414 bd = new BigDecimal(stringValue); 415 dfBig.applyPattern("#,##0.####"); 416 tiePosition = "exact"; 417 input = stringValue; 418 expected = "0.3115"; 419 formatOutputTestObject(dfBig, bd, tiePosition, input, expected); 420 421 // ==================== Printing results and exiting =================== 422 423 System.out.println(); 424 System.out.println("==> " + testCounter + " tests passed successfully"); 425 System.out.println("==> " + errorCounter + " tests failed"); 426 427 System.out.println(); 428 if (allPassed) { 429 System.out.println( 430 "Success in formating all the values with the given parameters"); 431 } else { 432 String s = "Test failed with " + errorCounter + " formating error(s)."; 433 System.out.println(s); 434 throw new RuntimeException(s); 435 } 436 } 437 }