/* * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ /* @test * * @bug 7131459 * @summary test various situations of NumberFormat rounding when close to tie * @author Olivier Lagneau * @run main TieRoundingTest * */ import java.math.BigDecimal; import java.math.BigInteger; import java.text.NumberFormat; import java.text.DecimalFormat; import java.math.RoundingMode; import java.util.Locale; public class TieRoundingTest { static int testCounter = 0; static int errorCounter = 0; static boolean allPassed = true; static void formatOutputTestDouble(NumberFormat nf, double doubleToTest, String tiePosition, String inputDigits, String expectedOutput) { int mfd = nf.getMaximumFractionDigits(); RoundingMode rm = nf.getRoundingMode(); String result = nf.format(doubleToTest); if (!result.equals(expectedOutput)) { System.out.println(); System.out.println("========================================"); System.out.println("***Error formatting double value from string : " + inputDigits); System.out.println("NumberFormat pattern is : " + ((DecimalFormat ) nf).toPattern()); System.out.println("Maximum number of fractional digits : " + mfd); System.out.println("Fractional rounding digit : " + (mfd + 1)); System.out.println("Position of value relative to tie : " + tiePosition); System.out.println("Rounding Mode : " + rm); System.out.println("BigDecimal output : " + new BigDecimal(doubleToTest).toString()); System.out.println("FloatingDecimal output : " + doubleToTest); System.out.println( "Error. Formatted result different from expected." + "\nExpected output is : \"" + expectedOutput + "\"" + "\nFormated output is : \"" + result + "\""); System.out.println("========================================"); System.out.println(); errorCounter++; allPassed = false; } else { testCounter++; System.out.println("\nSuccess for double value : " + doubleToTest + " :"); System.out.println(" Input digits :" + inputDigits + ", BigDecimal value : " + new BigDecimal(doubleToTest).toString()); System.out.print(" Rounding mode: " + rm); System.out.print(", fract digits : " + mfd); System.out.print(", position : " + tiePosition + " tie"); System.out.print(", result : " + result); System.out.println(", expected : " + expectedOutput); } } static void formatOutputTestLong(NumberFormat nf, long longToTest, String tiePosition, String inputDigits, String expectedOutput) { int mfd = nf.getMaximumFractionDigits(); RoundingMode rm = nf.getRoundingMode(); String result = nf.format(longToTest); if (!result.equals(expectedOutput)) { System.out.println(); System.out.println("========================================"); System.out.println("***Error formatting double value from string : " + inputDigits); System.out.println("NumberFormat pattern is : " + ((DecimalFormat ) nf).toPattern()); System.out.println("Maximum number of fractional digits : " + mfd); System.out.println("Fractional rounding digit : " + (mfd + 1)); System.out.println("Position of value relative to tie : " + tiePosition); System.out.println("Rounding Mode : " + rm); System.out.println( "Error. Formatted result different from expected." + "\nExpected output is : \"" + expectedOutput + "\"" + "\nFormated output is : \"" + result + "\""); System.out.println("========================================"); System.out.println(); errorCounter++; allPassed = false; } else { testCounter++; System.out.print("Success. Long input :" + inputDigits); System.out.print(", rounding : " + rm); System.out.print(", fract digits : " + mfd); System.out.print(", tie position : " + tiePosition); System.out.println(", expected : " + expectedOutput); } } static void formatOutputTestObject(NumberFormat nf, Object someNumber, String tiePosition, String inputDigits, String expectedOutput) { int mfd = nf.getMaximumFractionDigits(); RoundingMode rm = nf.getRoundingMode(); String result = nf.format(someNumber); if (!result.equals(expectedOutput)) { System.out.println(); System.out.println("========================================"); System.out.println("***Error formatting number value from string : " + inputDigits); System.out.println("NumberFormat pattern is : " + ((DecimalFormat ) nf).toPattern()); System.out.println("Maximum number of fractional digits : " + mfd); System.out.println("Fractional rounding digit : " + (mfd + 1)); System.out.println("Position of value relative to tie : " + tiePosition); System.out.println("Rounding Mode : " + rm); System.out.println("Number self output representation: " + someNumber); System.out.println( "Error. Formatted result different from expected." + "\nExpected output is : \"" + expectedOutput + "\"" + "\nFormated output is : \"" + result + "\""); System.out.println("========================================"); System.out.println(); errorCounter++; allPassed = false; } else { testCounter++; System.out.print("Success. Number input :" + inputDigits); System.out.print(", rounding : " + rm); System.out.print(", fract digits : " + mfd); System.out.print(", tie position : " + tiePosition); System.out.println(", expected : " + expectedOutput); } } public static void main(String[] args) { // Only the 3 rounding modes below may be impacted by bug 7131459. // So we do not test the other rounding modes. RoundingMode[] roundingModes = { RoundingMode.HALF_DOWN, RoundingMode.HALF_EVEN, RoundingMode.HALF_UP }; // Precise the relative position of input value against its closest tie. String[] tieRelativePositions = { "below", "exact", "above", "below", "exact", "above", "below", "exact", "above", "below", "exact", "above" }; // =============== Testing double (and thus float) value cases ========= System.out.println("\n===== testing 3 digits rounding position ====="); double[] values3FractDigits = { // unimpacting values close to tie, with less than 3 input fract digits 1.115d, 1.125d, 1.135d, // impacting close to tie values covering all 6 cases 0.3115d, 0.3125d, 0.3135d, 0.6865d, 0.6875d, 0.6885d, // unimpacting values close to tie, with more than 3 input fract digits 1.46885d, 2.46875d, 1.46865d }; String[] inputs3FractDigits = { "1.115d", "1.125d", "1.135d", "0.3115d", "0.3125d", "0.3135d", "0.6865d", "0.6875d", "0.6885d", "1.46885d", "2.46875d", "1.46865d" }; String[][] expected3FractDigits = { {"1.115", "1.125", "1.135", "0.311", "0.312", "0.314", "0.686", "0.687", "0.689", "1.469", "2.469", "1.469" }, {"1.115", "1.125", "1.135", "0.311", "0.312", "0.314", "0.686", "0.688", "0.689", "1.469", "2.469", "1.469" }, {"1.115", "1.125", "1.135", "0.311", "0.313", "0.314", "0.686", "0.688", "0.689", "1.469", "2.469", "1.469" }, }; for (int r = 0; r < roundingModes.length; r++) { NumberFormat dfDefault = NumberFormat.getInstance(Locale.US); RoundingMode rmode = roundingModes[r]; dfDefault.setRoundingMode(rmode); System.out.println("\n----- Now checking " + rmode + " rounding mode -----"); for (int i = 0; i < values3FractDigits.length; i++) { double d = values3FractDigits[i]; String tiePosition = tieRelativePositions[i]; String input = inputs3FractDigits[i]; String expected = expected3FractDigits[r][i]; formatOutputTestDouble(dfDefault, d, tiePosition, input, expected); } } System.out.println("\n===== testing 5 digits rounding position ====="); double[] values5FractDigits = { // unimpacting values close to tie, with less than 5 input fract digits 1.3135d, 1.3125d, 1.3115d, // impacting values close to tie, covering all 6 cases 1.328115d, 1.328125d, 1.328135d, 1.796865d, 1.796875d, 1.796885d, // unimpacting values close to tie, with more than 5 input fract digits 1.3281149999999d, 1.75390625d, 1.7968750000001d }; String[] inputs5FractDigits = { "1.3135d", "1.3125d", "1.3115d", "1.328115d", "1.328125d", "1.328135d", "1.796865d", "1.796875d", "1.796885d", "1.3281149999999d", "1.75390625d", "1.7968750000001d" }; String[][] expected5FractDigits = { {"1.3135", "1.3125", "1.3115", "1.32811", "1.32812", "1.32814", "1.79686", "1.79687", "1.79689", "1.32811", "1.75391", "1.79688" }, {"1.3135", "1.3125", "1.3115", "1.32811", "1.32812", "1.32814", "1.79686", "1.79688", "1.79689", "1.32811", "1.75391", "1.79688" }, {"1.3135", "1.3125", "1.3115", "1.32811", "1.32813", "1.32814", "1.79686", "1.79688", "1.79689", "1.32811", "1.75391", "1.79688" } }; for (int r = 0; r < roundingModes.length; r++) { DecimalFormat df5 = (DecimalFormat) NumberFormat.getInstance(Locale.US); RoundingMode rmode = roundingModes[r]; df5.setRoundingMode(rmode); System.out.println("\n----- Now checking " + rmode + " rounding mode -----"); df5.applyPattern("#,###.#####"); for (int i = 0; i < values5FractDigits.length; i++) { double d = values5FractDigits[i]; String tiePosition = tieRelativePositions[i]; String input = inputs5FractDigits[i]; String expected = expected5FractDigits[r][i]; formatOutputTestDouble(df5, d, tiePosition, input, expected); } } // ==================== Testing long value cases ==================== System.out.println("\n===== testing long values ====="); long l = 123456789012345L; DecimalFormat dfLong = (DecimalFormat) NumberFormat.getInstance(Locale.US); String tiePosition = "exact"; String input = "123456789012345L"; String expected = "123,456,789,012,345"; String result = dfLong.format(l); formatOutputTestLong(dfLong, l, tiePosition, input, expected); dfLong.applyPattern("0.###E0"); expected = "1.235E14"; formatOutputTestLong(dfLong, l, tiePosition, input, expected); l = 123450000000000L; input = "123450000000000L"; expected = "1.234E14"; formatOutputTestLong(dfLong, l, tiePosition, input, expected); l = 987750000000000L; input = "987750000000000L"; expected = "9.878E14"; formatOutputTestLong(dfLong, l, tiePosition, input, expected); dfLong.applyPattern("#,###.0E0"); l = 987755000000000L; input = "987755000000000L"; expected = "987.76E12"; formatOutputTestLong(dfLong, l, tiePosition, input, expected); // ================= Testing BigInteger value cases ================= System.out.println("\n===== testing BigInteger values ====="); String stringValue = "12345678901234567890123456789012345"; BigInteger bi = new BigInteger(stringValue); DecimalFormat dfBig = (DecimalFormat) NumberFormat.getInstance(Locale.US); tiePosition = "exact"; input = stringValue; expected = "12,345,678,901,234,567,890,123,456,789,012,345"; formatOutputTestObject(dfBig, bi, tiePosition, input, expected); dfBig.applyPattern("0.###E0"); expected = "1.235E34"; formatOutputTestObject(dfBig, bi, tiePosition, input, expected); stringValue = "12345000000000000000000000000000000"; input = stringValue; bi = new BigInteger(stringValue); expected = "1.234E34"; formatOutputTestObject(dfBig, bi, tiePosition, input, expected); stringValue = "12345000000000000000000000000000001"; input = stringValue; bi = new BigInteger(stringValue); expected = "1.235E34"; formatOutputTestObject(dfBig, bi, tiePosition, input, expected); stringValue = "98755000000000000000000000000000000"; input = stringValue; bi = new BigInteger(stringValue); expected = "9.876E34"; formatOutputTestObject(dfBig, bi, tiePosition, input, expected); dfLong.applyPattern("#,###.0E0"); stringValue = "98775500000000000000000000000000000"; input = stringValue; expected = "987.76E34"; // =============== Testing BigDecimal value cases ================ System.out.println("\n===== testing BigDecimal values ====="); dfBig = (DecimalFormat) NumberFormat.getInstance(Locale.US); stringValue = "0.68850000000000000088817841970012523233890533447265625"; BigDecimal bd = new BigDecimal(stringValue); tiePosition = "exact"; input = stringValue; expected = "0.689"; formatOutputTestObject(dfBig, bd, tiePosition, input, expected); stringValue = "0.31149999999999999911182158029987476766109466552734375"; bd = new BigDecimal(stringValue); dfBig.applyPattern("#,##0.####"); tiePosition = "exact"; input = stringValue; expected = "0.3115"; formatOutputTestObject(dfBig, bd, tiePosition, input, expected); // ==================== Printing results and exiting =================== System.out.println(); System.out.println("==> " + testCounter + " tests passed successfully"); System.out.println("==> " + errorCounter + " tests failed"); System.out.println(); if (allPassed) { System.out.println( "Success in formating all the values with the given parameters"); } else { String s = "Test failed with " + errorCounter + " formating error(s)."; System.out.println(s); throw new RuntimeException(s); } } }