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