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/*
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* Copyright (c) 2005, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 6325535
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* @summary Test for the rounding behavior of negate(MathContext)
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* @author Joseph D. Darcy
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*/
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import java.math.*;
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public class NegateTests {
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static BigDecimal negateThenRound(BigDecimal bd, MathContext mc) {
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return bd.negate().plus(mc);
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}
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static BigDecimal absThenRound(BigDecimal bd, MathContext mc) {
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return bd.abs().plus(mc);
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}
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static int negateTest(BigDecimal[][] testCases, MathContext mc) {
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int failures = 0;
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for (BigDecimal [] testCase : testCases) {
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BigDecimal bd = testCase[0];
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BigDecimal neg1 = bd.negate(mc);
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BigDecimal neg2 = negateThenRound(bd, mc);
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BigDecimal expected = testCase[1];
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if (! neg1.equals(expected) ) {
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failures++;
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System.err.println("(" + bd + ").negate(" + mc + ") => " +
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neg1 + " != expected " + expected);
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}
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if (! neg1.equals(neg2) ) {
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failures++;
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System.err.println("(" + bd + ").negate(" + mc + ") => " +
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neg1 + " != ntr " + neg2);
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}
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// Test abs consistency
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BigDecimal abs = bd.abs(mc);
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BigDecimal expectedAbs = absThenRound(bd,mc);
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if (! abs.equals(expectedAbs) ) {
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failures++;
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System.err.println("(" + bd + ").abs(" + mc + ") => " +
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abs + " != atr " + expectedAbs);
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}
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}
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return failures;
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}
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static int negateTests() {
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int failures = 0;
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BigDecimal [][] testCasesCeiling = {
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{new BigDecimal("1.3"), new BigDecimal("-1")},
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{new BigDecimal("-1.3"), new BigDecimal("2")},
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};
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failures += negateTest(testCasesCeiling,
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new MathContext(1, RoundingMode.CEILING));
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BigDecimal [][] testCasesFloor = {
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{new BigDecimal("1.3"), new BigDecimal("-2")},
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{new BigDecimal("-1.3"), new BigDecimal("1")},
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};
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failures += negateTest(testCasesFloor,
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new MathContext(1, RoundingMode.FLOOR));
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return failures;
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}
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public static void main(String argv[]) {
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int failures = 0;
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failures += negateTests();
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if (failures > 0 )
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throw new RuntimeException("Incurred " + failures + " failures" +
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" testing the negate and/or abs.");
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}
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}
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