jdk-24/langtools/test/tools/javac/TestIndyStringConcat.java

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
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 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
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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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 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 */

/*
 * @test
 * @summary Test that StringConcat is working for JDK >= 9
 * @compile -source 6 -target 6 TestIndyStringConcat.java
 * @run main TestIndyStringConcat false
 * @clean TestIndyStringConcat*
 * @compile -source 7 -target 7 TestIndyStringConcat.java
 * @run main TestIndyStringConcat false
 * @clean TestIndyStringConcat*
 * @compile -source 8 -target 8 TestIndyStringConcat.java
 * @run main TestIndyStringConcat false
 * @clean TestIndyStringConcat*
 * @compile -XDstringConcat=inline -source 9 -target 9 TestIndyStringConcat.java
 * @run main TestIndyStringConcat false
 * @clean TestIndyStringConcat*
 * @compile -XDstringConcat=indy -source 9 -target 9 TestIndyStringConcat.java
 * @run main TestIndyStringConcat true
 * @clean TestIndyStringConcat*
 * @compile -XDstringConcat=indyWithConstants -source 9 -target 9 TestIndyStringConcat.java
 * @run main TestIndyStringConcat true
 */
public class TestIndyStringConcat {

    private static class MyObject {
        public String toString() {
            throw new RuntimeException("Boyyaa");
        }
    }

    class Inner { }

    public static void main(String[] args) {
        boolean useIndyConcat = Boolean.valueOf(args[0]);
        try {
            String s = "Foo" + new MyObject();
        } catch (RuntimeException ex) {
            boolean indifiedStringConcat = false;
            ex.printStackTrace();
            for (StackTraceElement e : ex.getStackTrace()) {
                if (e.getClassName().contains("$$StringConcat") &&
                        e.getMethodName().equals("concat")) {
                    indifiedStringConcat = true;
                    break;
                }
            }
            if (indifiedStringConcat != useIndyConcat) {
                throw new AssertionError();
            }
        }
    }
}