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* FITNESS FOR A PARTICULAR PURPOSE . See the GNU General Public License
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/* @test
* @ bug 8155106
* @ run testng / othervm - ea - esa test . java . lang . invoke . ArrayConstructorTest
*/
package test.java.lang.invoke;
import java.lang.invoke.MethodHandle;
import java.lang.invoke.MethodHandles;
import static java.lang.invoke.MethodType.methodType;
import static org.testng.AssertJUnit.*;
import org.testng.annotations.*;
public class ArrayConstructorTest {
static final MethodHandles.Lookup LOOKUP = MethodHandles.lookup();
@Test
public static void testFindConstructorArray() {
boolean caught = false ;
try {
MethodHandle h = LOOKUP.findConstructor(Object[].class , methodType(void .class ));
} catch (NoSuchMethodException nsme) {
assertEquals("no constructor for array class: [Ljava.lang.Object;" , nsme.getMessage());
caught = true ;
} catch (Exception e) {
throw new AssertionError("unexpected exception: " + e);
}
assertTrue(caught);
}
@DataProvider
static Object[][] arrayConstructorNegative() {
return new Object[][]{
{String.class , IllegalArgumentException.class , "not an array class: java.lang.String" },
{null , NullPointerException.class , null }
};
}
@Test(dataProvider = "arrayConstructorNegative" )
public static void testArrayConstructorNegative(Class <?> clazz, Class <?> exceptionClass, String message) {
boolean caught = false ;
try {
MethodHandle h = MethodHandles.arrayConstructor(clazz);
} catch (Exception e) {
assertEquals(exceptionClass, e.getClass());
if (message != null ) {
assertEquals(message, e.getMessage());
}
caught = true ;
}
assertTrue(caught);
}
@Test
public static void testArrayConstructor() throws Throwable {
MethodHandle h = MethodHandles.arrayConstructor(String[].class );
assertEquals(methodType(String[].class , int .class ), h.type());
String[] a = (String[]) h.invoke(17 );
assertEquals(17 , a.length);
}
@Test(expectedExceptions = {NegativeArraySizeException.class })
public static void testArrayConstructorNegativeIndex() throws Throwable {
MethodHandle h = MethodHandles.arrayConstructor(String[].class );
assertEquals(methodType(String[].class , int .class ), h.type());
h.invoke(-1 ); // throws exception
}
}
Messung V0.5 in Prozent C=97 H=94 G=95
¤ Dauer der Verarbeitung: 0.11 Sekunden
(vorverarbeitet am 2026-09-28)
¤
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