| /* |
| * Copyright (c) 2009, 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. |
| */ |
| package test.java.math.BigDecimal; |
| |
| /* |
| * @test |
| * @bug 1234567 |
| * @summary Test that precision() is computed properly. |
| * @author Joseph D. Darcy |
| */ |
| |
| import java.math.*; |
| import static java.math.BigDecimal.*; |
| |
| import org.testng.Assert; |
| import org.testng.annotations.Test; |
| |
| // Android-changed: Replace error counting with asserts. |
| public class PrecisionTests { |
| private static BigDecimal NINE = valueOf(9); |
| |
| @Test |
| public void testPrecision() { |
| // Smallest and largest values of a given length |
| BigDecimal[] testValues = { |
| valueOf(1), valueOf(9), |
| }; |
| |
| testPrecision(new BigDecimal(0), 1); |
| |
| for(int i = 1; i < 100; i++) { |
| for(BigDecimal bd : testValues) { |
| testPrecision(bd, i); |
| testPrecision(bd.negate(), i); |
| } |
| |
| testValues[0] = testValues[0].multiply(TEN); |
| testValues[1] = testValues[1].multiply(TEN).add(NINE); |
| } |
| |
| // The following test tries to cover testings for precision of long values |
| BigDecimal[] randomTestValues = { |
| valueOf(2147483648L), // 2^31: 10 digits |
| valueOf(-2147483648L), // -2^31: 10 digits |
| valueOf(98893745455L), // random: 11 digits |
| valueOf(3455436789887L), // random: 13 digits |
| valueOf(140737488355328L), // 2^47: 15 digits |
| valueOf(-140737488355328L), // -2^47: 15 digits |
| valueOf(7564232235739573L), // random: 16 digits |
| valueOf(25335434990002322L), // random: 17 digits |
| valueOf(9223372036854775807L), // 2^63 - 1: 19 digits |
| valueOf(-9223372036854775807L) // -2^63 + 1: 19 digits |
| }; |
| // The array below contains the expected precision of the above numbers |
| int[] expectedPrecision = {10, 10, 11, 13, 15, 15, 16, 17, 19, 19}; |
| for (int i = 0; i < randomTestValues.length; i++) { |
| testPrecision(randomTestValues[i], expectedPrecision[i]); |
| } |
| } |
| |
| private static void testPrecision(BigDecimal bd, int expected) { |
| int precision = bd.precision(); |
| |
| Assert.assertEquals(precision, expected, |
| String.format("For (%s).precision expected %d, got %d%n", bd, expected, precision)); |
| } |
| } |