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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
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/* @test
 * @bug 8155106
 * @run junit/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 org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.MethodSource;

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

public class ArrayConstructorTest {

    static final MethodHandles.Lookup LOOKUP = MethodHandles.lookup();

    @Test
    public void testFindConstructorArray() {
        var nsme = assertThrows(NoSuchMethodException.class, () -> LOOKUP.findConstructor(Object[].class, methodType(void.class)));
        assertEquals("no constructor for array class: [Ljava.lang.Object;", nsme.getMessage());
    }

    static Object[][] arrayConstructorNegative() {
        return new Object[][]{
                {String.class, IllegalArgumentException.class, "not an array class: java.lang.String"},
                {null, NullPointerException.class, null}
        };
    }

    @ParameterizedTest
    @MethodSource("arrayConstructorNegative")
    public void testArrayConstructorNegative(Class<?> clazz, Class<? extends Exception> exceptionClass, String message) {
        var e = assertThrowsExactly(exceptionClass, () -> MethodHandles.arrayConstructor(clazz));
        if (message != null) {
            assertEquals(message, e.getMessage());
        }
    }

    @Test
    public 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
    public void testArrayConstructorNegativeIndex() throws Throwable {
        MethodHandle h = MethodHandles.arrayConstructor(String[].class);
        assertEquals(methodType(String[].class, int.class), h.type());
        assertThrows(NegativeArraySizeException.class, () -> h.invoke(-1));
    }

}