test/jdk/java/util/Locale/LocaleConstructors.java

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/*
 * @test
 * @bug 4316602
 * @author joconner
 * @summary Verify all Locale constructors and of() methods
 * @run junit LocaleConstructors
 */

import java.util.Locale;

import org.junit.jupiter.api.Test;

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

/**
 * This class tests to ensure that the language, language/country, and
 * language/country/variant Locale constructors + of() method are all allowed.
 */
public class LocaleConstructors {

    static final String LANG = "en";
    static final String COUNTRY = "US";
    static final String VAR = "socal";

    // Test Locale constructor and .of() allow (language) argument(s)
    @Test
    public void langTest() {
        Locale aLocale = Locale.of(LANG);
        Locale otherLocale = new Locale(LANG);
        assertEquals(aLocale.toString(), LANG);
        assertEquals(otherLocale.toString(), LANG);
    }

    // Test Locale constructor and .of() allow (language, constructor) argument(s)
    @Test
    public void langCountryTest() {
        Locale aLocale = Locale.of(LANG, COUNTRY);
        Locale otherLocale = new Locale(LANG, COUNTRY);
        assertEquals(aLocale.toString(), String.format("%s_%s",
                LANG, COUNTRY));
        assertEquals(otherLocale.toString(), String.format("%s_%s",
                LANG, COUNTRY));
    }

    // Test Locale constructor and .of() allow
    // (language, constructor, variant) argument(s)
    @Test
    public void langCountryVariantTest() {
        Locale aLocale = Locale.of(LANG, COUNTRY, VAR);
        Locale otherLocale = new Locale(LANG, COUNTRY, VAR);
        assertEquals(aLocale.toString(), String.format("%s_%s_%s",
                LANG, COUNTRY, VAR));
        assertEquals(otherLocale.toString(), String.format("%s_%s_%s",
                LANG, COUNTRY, VAR));
    }
}