test/jdk/java/lang/String/CompactString/SubString.java

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

import static org.testng.Assert.assertEquals;

/*
 * @test
 * @bug 8077559
 * @summary Tests Compact String. This one is for String.subString.
 * @run testng/othervm -XX:+CompactStrings SubString
 * @run testng/othervm -XX:-CompactStrings SubString
 */

public class SubString extends CompactString {

    @DataProvider
    public Object[][] provider() {
        return new Object[][] {

                new Object[] { STRING_EMPTY, 0, 0, "" },
                new Object[] { STRING_L1, 0, 1, "A" },
                new Object[] { STRING_L1, 1, 1, "" },
                new Object[] { STRING_L2, 0, 2, "AB" },
                new Object[] { STRING_L2, 1, 2, "B" },
                new Object[] { STRING_LLONG, 0, 8, "ABCDEFGH" },
                new Object[] { STRING_LLONG, 7, 8, "H" },
                new Object[] { STRING_LLONG, 8, 8, "" },
                new Object[] { STRING_LLONG, 3, 7, "DEFG" },
                new Object[] { STRING_U1, 0, 1, "\uFF21" },
                new Object[] { STRING_U1, 1, 1, "" },
                new Object[] { STRING_U1, 0, 0, "" },
                new Object[] { STRING_U2, 0, 2, "\uFF21\uFF22" },
                new Object[] { STRING_U2, 1, 2, "\uFF22" },
                new Object[] { STRING_U2, 2, 2, "" },
                new Object[] { STRING_U2, 0, 2, "\uFF21\uFF22" },
                new Object[] { STRING_U2, 1, 2, "\uFF22" },
                new Object[] { STRING_M12, 1, 2, "A" },
                new Object[] { STRING_M11, 0, 1, "A" },
                new Object[] { STRING_M11, 1, 2, "\uFF21" },
                new Object[] { STRING_UDUPLICATE, 1, 5,
                        "\uFF22\uFF21\uFF22\uFF21" },
                new Object[] { STRING_MDUPLICATE1, 9, 10, "A" },
                new Object[] { STRING_MDUPLICATE1, 7, 8, "A" }, };
    }

    @Test(dataProvider = "provider")
    public void testSubstring(String str, int beginIndex, int endIndex,
            String expected) {
        map.get(str)
                .forEach(
                        (source, data) -> {
                            assertEquals(
                                    data.substring(beginIndex, endIndex),
                                    expected,
                                    String.format(
                                            "testing String(%s).substring(%d, %d), source : %s, ",
                                            escapeNonASCIIs(data), beginIndex,
                                            endIndex, source));
                        });
    }
}