test/jdk/java/text/Format/NumberFormat/DFSExponential.java

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/*
 * @test
 * @bug 4068067
 * @summary test NumberFormat with exponential separator symbols. It also tests the new
 *          public methods in DecimalFormatSymbols, setExponentSeparator() and
 *          getExponentSeparator()
 * @run junit DFSExponential
 */

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

import org.junit.jupiter.api.Test;

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

public class DFSExponential {

    @Test
    public void TestDFSExponential() {
        DecimalFormatSymbols sym = new DecimalFormatSymbols(Locale.US);
        String[] pat = { "0.####E0", "00.000E00", "##0.####E000", "0.###E0;[0.###E0]"};
        double[] val = { 0.01234, 123456789, 1.23e300, -3.141592653e-271};
        String[][] valFormat = {
                {"1.234x10^-2", "1.2346x10^8", "1.23x10^300", "-3.1416x10^-271"},
                {"12.340x10^-03", "12.346x10^07", "12.300x10^299", "-31.416x10^-272"},
                {"12.34x10^-003", "123.4568x10^006", "1.23x10^300", "-314.1593x10^-273"},
                {"1.234x10^-2", "1.235x10^8", "1.23x10^300", "[3.142x10^-271]"},
        };
        System.out.println("Default exponent separator: "+sym.getExponentSeparator());
        try {
            sym.setExponentSeparator("x10^");
        } catch (NullPointerException e){
            fail("null String was passed to set an exponent separator symbol");
        }
        System.out.println("Current exponent separator: "+sym.getExponentSeparator());

        for (int p=0; p<pat.length; ++p){
            DecimalFormat fmt = new DecimalFormat(pat[p], sym);
            System.out.println("     Pattern: " + fmt.toPattern());
            String locPattern = fmt.toLocalizedPattern();
            System.out.println("     Localized pattern: "+locPattern);
            for (int v=0; v<val.length; ++v) {
                String s = fmt.format(val[v]);
                System.out.println("         " + val[v]+" --> "+s);
                if (valFormat[p][v].equals(s)){
                    System.out.println(": Passed");
                } else{
                   fail(" Failed: Should be formatted as "+valFormat[p][v]+ "but got "+s);
                }
           }
         }
    }
}