TestStringEncoding.java

/*
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 *  DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *  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
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import jdk.incubator.foreign.CLinker;
import jdk.incubator.foreign.MemorySegment;

import jdk.incubator.foreign.ResourceScope;
import org.testng.annotations.*;
import static org.testng.Assert.*;

/*
 * @test
 * @requires ((os.arch == "amd64" | os.arch == "x86_64") & sun.arch.data.model == "64") | os.arch == "aarch64"
 * @run testng TestStringEncoding
 */

public class TestStringEncoding {

    @Test(dataProvider = "strings")
    public void testStrings(String testString, int expectedByteLength) {
        try (ResourceScope scope = ResourceScope.newConfinedScope()) {
            MemorySegment text = CLinker.toCString(testString, scope);

            assertEquals(text.byteSize(), expectedByteLength);

            String roundTrip = CLinker.toJavaString(text);
            assertEquals(roundTrip, testString);
        }
    }

    @DataProvider
    public static Object[][] strings() {
        return new Object[][] {
            { "testing",               8 },
            { "",                      1 },
            { "X",                     2 },
            { "12345",                 6 },
            { "yen \u00A5",            7 }, // in UTF-8 2 bytes: 0xC2 0xA5
            { "snowman \u26C4",       12 }, // in UTF-8 three bytes: 0xE2 0x9B 0x84
            { "rainbow \uD83C\uDF08", 13 }  // in UTF-8 four bytes: 0xF0 0x9F 0x8C 0x88
        };
    }
}