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/*
* Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* 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).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/**
* @test
* @bug 8310242
* @run junit ForNameNames
* @summary Verify class names for Class.forName
*/
import java.util.stream.Stream;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.Arguments;
import org.junit.jupiter.params.provider.MethodSource;
import static org.junit.jupiter.api.Assertions.*;
public class ForNameNames {
static class Inner {}
static Stream<Arguments> testCases() {
return Stream.of(
Arguments.of("java.lang.String", String.class),
Arguments.of("[Ljava.lang.String;", String[].class),
Arguments.of("ForNameNames$Inner", Inner.class),
Arguments.of("[LForNameNames$Inner;", Inner[].class),
Arguments.of("[[I", int[][].class)
);
}
/*
* Test 1-arg and 3-arg Class::forName. Class::getName on the returned
* Class object returns the name passed to Class::forName.
*/
@ParameterizedTest
@MethodSource("testCases")
void testForName(String cn, Class<?> expected) throws ClassNotFoundException {
ClassLoader loader = ForNameNames.class.getClassLoader();
Class<?> c1 = Class.forName(cn, false, loader);
assertEquals(expected, c1);
assertEquals(cn, c1.getName());
Class<?> c2 = Class.forName(cn);
assertEquals(expected, c2);
assertEquals(cn, c2.getName());
}
static Stream<Arguments> invalidNames() {
return Stream.of(
Arguments.of("I"), // primitive type
Arguments.of("int[]"), // fully-qualified name of int array
Arguments.of("ForNameNames.Inner"), // fully-qualified name of nested type
Arguments.of("[java.lang.String"), // missing L and ;
Arguments.of("[Ljava.lang.String"), // missing ;
Arguments.of("[Ljava/lang/String;") // type descriptor
);
}
@ParameterizedTest
@MethodSource("invalidNames")
void testInvalidNames(String cn) {
ClassLoader loader = ForNameNames.class.getClassLoader();
assertThrows(ClassNotFoundException.class, () -> Class.forName(cn, false, loader));
}
@Test
void testModule() {
// Class.forName(Module, String) does not allow class name for array types
Class<?> c = Class.forName(Object.class.getModule(), "[Ljava.lang.String;");
assertNull(c);
}
}
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