1 /*
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 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.  Oracle designates this
 8  * particular file as subject to the "Classpath" exception as provided
 9  * by Oracle in the LICENSE file that accompanied this code.
10  *
11  * This code is distributed in the hope that it will be useful, but WITHOUT
12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14  * version 2 for more details (a copy is included in the LICENSE file that
15  * accompanied this code).
16  *
17  * You should have received a copy of the GNU General Public License version
18  * 2 along with this work; if not, write to the Free Software Foundation,
19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20  *
21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22  * or visit www.oracle.com if you need additional information or have any
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24  */
25 
26 import jdk.internal.misc.ValhallaFeatures;
27 
28 import org.junit.*;
29 import static org.junit.Assert.*;
30 
31 /*
32  * @test
33  * @modules java.base/jdk.internal.misc
34  * @summary Test feature flags reflect command line flags
35  * @run junit/othervm -Dexpected=true ValhallaFeaturesTest
36  * @run junit/othervm -XX:+EnableValhalla -Dexpected=true ValhallaFeaturesTest
37  * @run junit/othervm -XX:-EnableValhalla -Dexpected=false ValhallaFeaturesTest
38  */
39 
40 public class ValhallaFeaturesTest {
41 
42     // Save the expected enable from the command line -Dexpected
43     private static boolean expected = Boolean.getBoolean("expected");
44 
45     @Test
46     public void checkEnable() {
47         boolean enabled = ValhallaFeatures.isEnabled();
48         System.out.println("EnableValhalla: " + enabled);
49         assertEquals("EnableValhalla Flag", expected, enabled);
50     }
51 
52     @Test
53     public void checkEnsure() {
54         if (expected) {
55             // Throwing an exception is an error
56             ValhallaFeatures.ensureValhallaEnabled();
57         } else {
58             assertThrows("EnableValhalla Flag", UnsupportedOperationException.class,
59                     () -> ValhallaFeatures.ensureValhallaEnabled());
60         }
61     }
62 }