| /* |
| * Copyright (c) 2005, 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 6325535 |
| * @summary Test for the rounding behavior of negate(MathContext) |
| * @author Joseph D. Darcy |
| */ |
| |
| import java.math.*; |
| |
| public class NegateTests { |
| |
| static BigDecimal negateThenRound(BigDecimal bd, MathContext mc) { |
| return bd.negate().plus(mc); |
| } |
| |
| |
| static BigDecimal absThenRound(BigDecimal bd, MathContext mc) { |
| return bd.abs().plus(mc); |
| } |
| |
| |
| static int negateTest(BigDecimal[][] testCases, MathContext mc) { |
| int failures = 0; |
| |
| for (BigDecimal [] testCase : testCases) { |
| |
| BigDecimal bd = testCase[0]; |
| BigDecimal neg1 = bd.negate(mc); |
| BigDecimal neg2 = negateThenRound(bd, mc); |
| BigDecimal expected = testCase[1]; |
| |
| if (! neg1.equals(expected) ) { |
| failures++; |
| System.err.println("(" + bd + ").negate(" + mc + ") => " + |
| neg1 + " != expected " + expected); |
| } |
| |
| if (! neg1.equals(neg2) ) { |
| failures++; |
| System.err.println("(" + bd + ").negate(" + mc + ") => " + |
| neg1 + " != ntr " + neg2); |
| } |
| |
| // Test abs consistency |
| BigDecimal abs = bd.abs(mc); |
| BigDecimal expectedAbs = absThenRound(bd,mc); |
| if (! abs.equals(expectedAbs) ) { |
| failures++; |
| System.err.println("(" + bd + ").abs(" + mc + ") => " + |
| abs + " != atr " + expectedAbs); |
| } |
| |
| } |
| |
| return failures; |
| } |
| |
| static int negateTests() { |
| int failures = 0; |
| BigDecimal [][] testCasesCeiling = { |
| {new BigDecimal("1.3"), new BigDecimal("-1")}, |
| {new BigDecimal("-1.3"), new BigDecimal("2")}, |
| }; |
| |
| failures += negateTest(testCasesCeiling, |
| new MathContext(1, RoundingMode.CEILING)); |
| |
| BigDecimal [][] testCasesFloor = { |
| {new BigDecimal("1.3"), new BigDecimal("-2")}, |
| {new BigDecimal("-1.3"), new BigDecimal("1")}, |
| }; |
| |
| failures += negateTest(testCasesFloor, |
| new MathContext(1, RoundingMode.FLOOR)); |
| |
| return failures; |
| } |
| |
| public static void main(String argv[]) { |
| int failures = 0; |
| |
| failures += negateTests(); |
| |
| if (failures > 0 ) |
| throw new RuntimeException("Incurred " + failures + " failures" + |
| " testing the negate and/or abs."); |
| } |
| } |