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/*
* Copyright (c) 2024, 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 8326908
* @summary Verify DecimalFormat::toPattern correctness.
* @run junit ToPatternTest
*/
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.Arguments;
import org.junit.jupiter.params.provider.MethodSource;
import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertTrue;
import java.text.DecimalFormat;
import java.util.stream.Stream;
public class ToPatternTest {
// DecimalFormat constant
private static final int DOUBLE_FRACTION_DIGITS = 340;
// Ensure that toPattern() provides the correct amount of minimum
// and maximum digits for integer/fraction.
@ParameterizedTest
@MethodSource("minMaxDigits")
public void basicTest(int maxInt, int minInt, int maxFrac, int minFrac) {
DecimalFormat dFmt = new DecimalFormat();
dFmt.setMaximumIntegerDigits(maxInt);
dFmt.setMinimumIntegerDigits(minInt);
dFmt.setMaximumFractionDigits(maxFrac);
dFmt.setMinimumFractionDigits(minFrac);
// Non-localized separator always uses '.'
String[] patterns = dFmt.toPattern().split("\\.");
assertEquals(2, patterns.length,
dFmt.toPattern() + " should be split into an integer/fraction portion");
String integerPattern = patterns[0];
String fractionPattern = patterns[1];
// Count # and 0 explicitly (since there are grouping symbols)
assertEquals(integerPattern.chars().filter(ch -> ch == '0').count() +
integerPattern.chars().filter(ch -> ch == '#').count(),
Math.max(dFmt.getGroupingSize(), dFmt.getMinimumIntegerDigits()) + 1);
assertEquals(integerPattern.chars().filter(ch -> ch == '0').count(), dFmt.getMinimumIntegerDigits());
assertEquals(fractionPattern.length(), dFmt.getMaximumFractionDigits());
assertEquals(fractionPattern.chars().filter(ch -> ch == '0').count(), dFmt.getMinimumFractionDigits());
}
// General and edge cases for the min and max Integer/Fraction digits
private static Stream<Arguments> minMaxDigits() {
return Stream.of(
Arguments.of(10, 5, 10, 5),
Arguments.of(0, 0, 1, 1),
Arguments.of(1, 1, 1, 1),
Arguments.of(5, 5, 5, 5),
Arguments.of(5, 10, 5, 10),
Arguments.of(333, 27, 409, 3)
);
}
// Ensure that a NegativePattern is explicitly produced when required.
@Test
public void negativeSubPatternTest() {
DecimalFormat dFmt = new DecimalFormat();
dFmt.setPositivePrefix("foo");
dFmt.setPositiveSuffix("bar");
dFmt.setNegativePrefix("baz");
dFmt.setNegativeSuffix("qux");
String[] patterns = dFmt.toPattern().split(";");
assertEquals(2, patterns.length,
"There should be a positivePattern and negativePattern");
String positivePattern = patterns[0];
String negativePattern = patterns[1];
assertTrue(positivePattern.startsWith(dFmt.getPositivePrefix()));
assertTrue(positivePattern.endsWith(dFmt.getPositiveSuffix()));
assertTrue(negativePattern.startsWith(dFmt.getNegativePrefix()));
assertTrue(negativePattern.endsWith(dFmt.getNegativeSuffix()));
}
// 8326908: Verify that an empty pattern DecimalFormat does not throw an
// OutOfMemoryError when toPattern() is invoked. Behavioral change of
// MAXIMUM_INTEGER_DIGITS replaced with DOUBLE_FRACTION_DIGITS for empty
// pattern initialization.
@Test
public void emptyStringPatternTest() {
DecimalFormat empty = new DecimalFormat("");
// Verify new maximum fraction digits value
assertEquals(DOUBLE_FRACTION_DIGITS, empty.getMaximumFractionDigits());
// Verify no OOME for empty pattern
assertDoesNotThrow(empty::toPattern);
// Check toString for coverage, as it invokes toPattern
assertDoesNotThrow(empty::toString);
}
// Verify that only the last grouping interval is used for the grouping size.
@Test
public void groupingSizeTest() {
assertEquals(22,
new DecimalFormat( "###,####,"+"#".repeat(22)).getGroupingSize());
}
}
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