ToLocalizedPatternTest.java

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/*
 * @test
 * @bug 8282929
 * @summary Verifies that toLocalizedPattern() method correctly returns
 *          monetary symbols in a currency formatter
 * @run testng ToLocalizedPatternTest
 */

import static org.testng.Assert.assertEquals;
import org.testng.annotations.Test;

import java.text.DecimalFormat;
import java.text.DecimalFormatSymbols;
import java.util.Locale;

@Test
public class ToLocalizedPatternTest {
    private static final char MONETARY_GROUPING = 'g';
    private static final char MONETARY_DECIMAL = 'd';

    public void testToLocalizedPattern() {
        var dfs = new DecimalFormatSymbols(Locale.US);

        // Customize the decimal format symbols
        dfs.setMonetaryGroupingSeparator(MONETARY_GROUPING);
        dfs.setMonetaryDecimalSeparator(MONETARY_DECIMAL);

        // create a currency formatter
        var cf = (DecimalFormat)DecimalFormat.getCurrencyInstance(Locale.US);
        cf.setDecimalFormatSymbols(dfs);

        // check
        assertEquals(cf.toLocalizedPattern(),
            cf.toPattern()
               .replace(',', MONETARY_GROUPING)
               .replace('.', MONETARY_DECIMAL));
    }
}