145 lines
5.7 KiB
Java
145 lines
5.7 KiB
Java
/*
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* Copyright (c) 2005, 2023, 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 6806261 8211936 8305343
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* @summary Tests of BigDecimal.longValueExact
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*/
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import java.math.*;
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import java.util.List;
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import java.util.Map;
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import static java.util.Map.entry;
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public class LongValueExactTests {
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public static void main(String... args) {
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int failures = 0;
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failures += longValueExactSuccessful();
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failures += longValueExactExceptional();
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failures += longValueExactExceptional8305343();
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if (failures > 0) {
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throw new RuntimeException("Incurred " + failures +
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" failures while testing longValueExact.");
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}
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}
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private static long simpleLongValueExact(BigDecimal bd) {
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return bd.toBigIntegerExact().longValue();
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}
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private static int longValueExactSuccessful() {
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int failures = 0;
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// Strings used to create BigDecimal instances on which invoking
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// longValueExact() will succeed.
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Map<BigDecimal, Long> successCases =
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Map.ofEntries(entry(new BigDecimal("9223372036854775807"), Long.MAX_VALUE), // 2^63 -1
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entry(new BigDecimal("9223372036854775807.0"), Long.MAX_VALUE),
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entry(new BigDecimal("9223372036854775807.00"), Long.MAX_VALUE),
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entry(new BigDecimal("-9223372036854775808"), Long.MIN_VALUE), // -2^63
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entry(new BigDecimal("-9223372036854775808.0"), Long.MIN_VALUE),
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entry(new BigDecimal("-9223372036854775808.00"),Long.MIN_VALUE),
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entry(new BigDecimal("1e0"), 1L),
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entry(new BigDecimal(BigInteger.ONE, -18), 1_000_000_000_000_000_000L),
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entry(new BigDecimal("0e13"), 0L), // Fast path zero
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entry(new BigDecimal("0e64"), 0L),
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entry(new BigDecimal("0e1024"), 0L),
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entry(new BigDecimal("10.000000000000000000000000000000000"), 10L));
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for (var testCase : successCases.entrySet()) {
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BigDecimal bd = testCase.getKey();
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long expected = testCase.getValue();
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try {
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long longValueExact = bd.longValueExact();
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if (expected != longValueExact ||
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longValueExact != simpleLongValueExact(bd)) {
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failures++;
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System.err.println("Unexpected longValueExact result " + longValueExact +
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" on " + bd);
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}
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} catch (Exception e) {
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failures++;
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System.err.println("Error on " + bd + "\tException message:" + e.getMessage());
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}
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}
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return failures;
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}
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private static int longValueExactExceptional() {
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int failures = 0;
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List<BigDecimal> exceptionalCases =
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List.of(new BigDecimal("9223372036854775808"), // Long.MAX_VALUE + 1
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new BigDecimal("9223372036854775808.0"),
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new BigDecimal("9223372036854775808.00"),
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new BigDecimal("-9223372036854775809"), // Long.MIN_VALUE - 1
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new BigDecimal("-9223372036854775808.1"),
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new BigDecimal("-9223372036854775808.01"),
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new BigDecimal("9999999999999999999"),
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new BigDecimal("10000000000000000000"),
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new BigDecimal("0.99"),
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new BigDecimal("0.999999999999999999999"));
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for (BigDecimal bd : exceptionalCases) {
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try {
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long longValueExact = bd.longValueExact();
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failures++;
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System.err.println("Unexpected non-exceptional longValueExact on " + bd);
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} catch (ArithmeticException e) {
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// Success;
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}
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}
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return failures;
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}
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private static int longValueExactExceptional8305343() {
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int failures = 0;
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List<BigDecimal> exceptionalCases =
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List.of(new BigDecimal("1e" + (Integer.MAX_VALUE - 1)),
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new BigDecimal("1e" + (Integer.MAX_VALUE))
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);
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for (BigDecimal bd : exceptionalCases) {
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try {
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bd.longValueExact();
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failures++;
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System.err.println("Unexpected non-exceptional longValueExact on " + bd);
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} catch (ArithmeticException e) {
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if (!e.getMessage().toLowerCase().contains("overflow")) {
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failures++;
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System.err.println("Unexpected non-exceptional longValueExact on " + bd);
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}
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}
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}
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return failures;
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}
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}
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