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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
* accompanied this code ) .
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package test.sun.invoke.util;
import sun.invoke.util.ValueConversions;
import sun.invoke.util.Wrapper;
import java.lang.invoke.MethodHandles;
import java.lang.invoke.MethodType;
import java.lang.invoke.MethodHandle;
import java.io.Serializable;
import java.util.Arrays;
import org.junit.Test;
import static org.junit.Assert .*;
/* @test
* @ summary unit tests to assert Wrapper zero identities and conversion behave correctly
* @ modules java . base / sun . invoke . util
* @ compile - XDignore . symbol . file WrapperTest . java
* @ run junit test . sun . invoke . util . WrapperTest
*/
public class WrapperTest {
@Test
public void testShortZeroConversion() throws Throwable {
MethodHandle h1 = MethodHandles.constant(Short .class , (short )42 );
MethodHandle h2 = h1.asType(MethodType.methodType(void .class )); // drop 42
MethodHandle h3 = h2.asType(MethodType.methodType(short .class )); // add 0
MethodHandle h4 = h3.asType(MethodType.methodType(Object.class )); // box
Object x = h4.invokeExact();
assertEquals(x, (short )0 );
assertTrue(x == Short .valueOf((short )0 ));
assertTrue(x == Wrapper.SHORT .zero());
}
@Test
public void testIntZeroConversion() throws Throwable {
MethodHandle h1 = MethodHandles.constant(Integer.class , 42 );
MethodHandle h2 = h1.asType(MethodType.methodType(void .class )); // drop 42
MethodHandle h3 = h2.asType(MethodType.methodType(int .class )); // add 0
MethodHandle h4 = h3.asType(MethodType.methodType(Object.class )); // box
Object x = h4.invokeExact();
assertEquals(x, 0 );
assertTrue(x == Integer.valueOf(0 ));
assertTrue(x == Wrapper.INT .zero());
}
@Test
public void testLongZeroConversion() throws Throwable {
MethodHandle h1 = MethodHandles.constant(Long .class , 42 L);
MethodHandle h2 = h1.asType(MethodType.methodType(void .class )); // drop 42
MethodHandle h3 = h2.asType(MethodType.methodType(long .class )); // add 0
MethodHandle h4 = h3.asType(MethodType.methodType(Object.class )); // box
Object x = h4.invokeExact();
assertEquals(x, 0 L);
assertTrue(x == Long .valueOf(0 ));
assertTrue(x == Wrapper.LONG .zero());
}
@Test
public void testByteZeroConversion() throws Throwable {
MethodHandle h1 = MethodHandles.constant(Byte .class , (byte )42 );
MethodHandle h2 = h1.asType(MethodType.methodType(void .class )); // drop 42
MethodHandle h3 = h2.asType(MethodType.methodType(byte .class )); // add 0
MethodHandle h4 = h3.asType(MethodType.methodType(Object.class )); // box
Object x = h4.invokeExact();
assertEquals(x, (byte )0 );
assertTrue(x == Byte .valueOf((byte )0 ));
assertTrue(x == Wrapper.BYTE .zero());
}
@Test
public void testCharacterZeroConversion() throws Throwable {
MethodHandle h1 = MethodHandles.constant(Character.class , (char )42 );
MethodHandle h2 = h1.asType(MethodType.methodType(void .class )); // drop 42
MethodHandle h3 = h2.asType(MethodType.methodType(char .class )); // add 0
MethodHandle h4 = h3.asType(MethodType.methodType(Object.class )); // box
Object x = h4.invokeExact();
assertEquals(x, (char )0 );
assertTrue(x == Character.valueOf((char )0 ));
assertTrue(x == Wrapper.CHAR .zero());
}
}
Messung V0.5 in Prozent C=85 H=88 G=86
¤ Dauer der Verarbeitung: 0.11 Sekunden
(vorverarbeitet am 2026-06-10)
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