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Datei: TestOf.java Sprache: JAVA

/*
* Copyright (c) 2022, 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 8282819
* @summary Unit tests for Locale.of() method. Those tests check the equality
*      of obtained objects with ones that are gotten from other means with both
*      well-formed and ill-formed arguments. Also checks the possible NPEs
*      for error cases.
* @run testng TestOf
*/
import static org.testng.Assert.assertEquals;
import static org.testng.Assert.assertThrows;

import java.util.Locale;

import org.testng.annotations.Test;
import org.testng.annotations.DataProvider;

@SuppressWarnings("deprecation")
@Test
public class TestOf {

    @DataProvider
    public Object[][] data_1Arg() {
        return new Object[][]{
                // well-formed
                {Locale.ENGLISH, "en"},
                {Locale.JAPANESE, "ja"},

                // ill-formed
                {Locale.ROOT, ""},
                {new Locale("a"), "a"},
                {new Locale("xxxxxxxxxx"), "xxxxxxxxxx"},
        };
    }

    @DataProvider
    public Object[][] data_2Args() {
        return new Object[][]{
                // well-formed
                {Locale.US, "en", "US"},
                {Locale.JAPAN, "ja", "JP"},

                // ill-formed
                {new Locale("", "US"), "", "US"},
                {new Locale("a", "b"), "a", "b"},
                {new Locale("xxxxxxxxxx", "yyyyyyyyyy"), "xxxxxxxxxx", "yyyyyyyyyy"},
        };
    }

    @DataProvider
    public Object[][] data_3Args() {
        return new Object[][]{
                // well-formed
                {Locale.forLanguageTag("en-US-POSIX"), "en", "US", "POSIX"},
                {Locale.forLanguageTag("ja-JP-POSIX"), "ja", "JP", "POSIX"},

                // ill-formed
                {new Locale("", "", "POSIX"), "", "", "POSIX"},
                {new Locale("a", "b", "c"), "a", "b", "c"},
                {new Locale("xxxxxxxxxx", "yyyyyyyyyy", "zzzzzzzzzz"),
                        "xxxxxxxxxx", "yyyyyyyyyy", "zzzzzzzzzz"},
                {new Locale("ja", "JP", "JP"), "ja", "JP", "JP"},
                {new Locale("th", "TH", "TH"), "th", "TH", "TH"},
                {new Locale("no", "NO", "NY"), "no", "NO", "NY"},
        };
    }

    @Test (dataProvider = "data_1Arg")
    public void test_1Arg(Locale expected, String lang) {
        assertEquals(Locale.of(lang), expected);
    }

    @Test (dataProvider = "data_2Args")
    public void test_2Args(Locale expected, String lang, String ctry) {
        assertEquals(Locale.of(lang, ctry), expected);
    }

    @Test (dataProvider = "data_3Args")
    public void test_3Args(Locale expected, String lang, String ctry, String vrnt) {
        assertEquals(Locale.of(lang, ctry, vrnt), expected);
    }

    @Test
    public void test_NPE() {
        assertThrows(NullPointerException.class, () -> Locale.of(null));
        assertThrows(NullPointerException.class, () -> Locale.of("", null));
        assertThrows(NullPointerException.class, () -> Locale.of("", "", null));
    }
}

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