1 /*
 2  * Copyright (c) 2014, 2024, Oracle and/or its affiliates. All rights reserved.
 3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 4  *
 5  * This code is free software; you can redistribute it and/or modify it
 6  * under the terms of the GNU General Public License version 2 only, as
 7  * published by the Free Software Foundation.
 8  *
 9  * This code is distributed in the hope that it will be useful, but WITHOUT
10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12  * version 2 for more details (a copy is included in the LICENSE file that
13  * accompanied this code).
14  *
15  * You should have received a copy of the GNU General Public License version
16  * 2 along with this work; if not, write to the Free Software Foundation,
17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18  *
19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20  * or visit www.oracle.com if you need additional information or have any
21  * questions.
22  */
23 
24 /*
25  * @test
26  * @bug 8042251
27  * @summary Test that there are no inner classes attributes in case of there are no inner classes.
28  * @library /tools/lib /tools/javac/lib ../lib
29  * @modules jdk.compiler/com.sun.tools.javac.api
30  *          jdk.compiler/com.sun.tools.javac.main
31  * @build toolbox.ToolBox InMemoryFileManager TestBase
32  * @run main NoInnerClassesTest
33  */
34 
35 import java.lang.classfile.Attributes;
36 import java.lang.classfile.ClassModel;
37 
38 import java.io.IOException;
39 
40 public class NoInnerClassesTest extends TestBase {
41 
42     public static void main(String[] args) throws IOException {
43         new NoInnerClassesTest().test();
44     }
45 
46     public void test() throws IOException {
47         ClassModel classModel = readClassFile("NoInnerClassesTest");
48         assertNull(classModel.findAttribute(Attributes.innerClasses()).orElse(null), "Found inner class attribute");
49     }
50 }