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/*
* 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.");
}
}
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