test/jdk/java/util/Locale/RequiredAvailableLocalesTest.java - master - niceSOFT/openjdk21

test/jdk/java/util/Locale/RequiredAvailableLocalesTest.java
85 строк3 KB
Goetz Lindenmaier
8368335: Refactor the rest of Locale TestNG based tests to JUnit
08 апр 2026, 10:57
08 апр 2026, 10:579f63b49
/*
 * Copyright (c) 2021, 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 8276186
 * @summary Checks whether getAvailableLocales() returns at least Locale.ROOT and
 *      Locale.US instances.
 * @run junit/othervm -Djava.locale.providers=COMPAT RequiredAvailableLocalesTest
 * @run junit/othervm -Djava.locale.providers=CLDR RequiredAvailableLocalesTest
 */

import java.lang.invoke.MethodHandles;
import java.lang.invoke.MethodType;
import java.text.BreakIterator;
import java.text.Collator;
import java.text.DateFormat;
import java.text.DateFormatSymbols;
import java.text.DecimalFormatSymbols;
import java.text.NumberFormat;
import java.time.format.DecimalStyle;
import java.util.Arrays;
import java.util.Calendar;
import java.util.Locale;
import java.util.Set;

import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.MethodSource;

import static org.junit.jupiter.api.Assertions.assertTrue;

public class RequiredAvailableLocalesTest {

    private static final Set<Locale> REQUIRED_LOCALES = Set.of(Locale.ROOT, Locale.US);
    private static final MethodType ARRAY_RETURN_TYPE = MethodType.methodType(Locale.class.arrayType());
    private static final MethodType SET_RETURN_TYPE = MethodType.methodType(Set.class);

    static Object[][] availableLocalesClasses() {
        return new Object[][] {
            {BreakIterator.class, ARRAY_RETURN_TYPE},
            {Calendar.class, ARRAY_RETURN_TYPE},
            {Collator.class, ARRAY_RETURN_TYPE},
            {DateFormat.class, ARRAY_RETURN_TYPE},
            {DateFormatSymbols.class, ARRAY_RETURN_TYPE},
            {DecimalFormatSymbols.class, ARRAY_RETURN_TYPE},
            {DecimalStyle.class, SET_RETURN_TYPE},
            {Locale.class, ARRAY_RETURN_TYPE},
            {NumberFormat.class, ARRAY_RETURN_TYPE},
        };
    }

    @MethodSource("availableLocalesClasses")
    @ParameterizedTest
    void checkRequiredLocales(Class<?> c, MethodType mt) throws Throwable {
        var ret = MethodHandles.lookup().findStatic(c, "getAvailableLocales", mt).invoke();

        if (ret instanceof Locale[] a) {
            assertTrue(Arrays.asList(a).containsAll(REQUIRED_LOCALES));
        } else if (ret instanceof Set<?> s) {
            assertTrue(s.containsAll(REQUIRED_LOCALES));
        } else {
            throw new RuntimeException("return type mismatch");
        }
    }
}