Assert that RT_SCOPE_* and IFA_F_* are not zero.

If these constants are zero (or, rather, if they're not all
different), the test will fail with more cryptic error messages
whose cause is not obvious. Clearly check for that here.

Bug: 15602893
Change-Id: I7ca4a9c5e3d592fd93fbfa1b50666a1861a0031d

1 files changed, 12 insertions, 0 deletions

diff --git a/core/tests/coretests/src/android/net/LinkAddressTest.java b/core/tests/coretests/src/android/net/LinkAddressTest.java
index 814ecdd..7bc3974 100644
--- a/core/tests/coretests/src/android/net/LinkAddressTest.java
+++ b/core/tests/coretests/src/android/net/LinkAddressTest.java
@@ -30,6 +30,7 @@ import java.util.List;
 import android.net.LinkAddress;
 import android.os.Parcel;
 import android.test.AndroidTestCase;
+import static android.test.MoreAsserts.assertNotEqual;
 import android.test.suitebuilder.annotation.SmallTest;
 
 import static android.system.OsConstants.IFA_F_DEPRECATED;
@@ -50,6 +51,17 @@ public class LinkAddressTest extends AndroidTestCase {
     private static final InetAddress V4_ADDRESS = NetworkUtils.numericToInetAddress(V4);
     private static final InetAddress V6_ADDRESS = NetworkUtils.numericToInetAddress(V6);
 
+    public void testConstants() {
+        // RT_SCOPE_UNIVERSE = 0, but all the other constants should be nonzero.
+        assertNotEqual(0, RT_SCOPE_HOST);
+        assertNotEqual(0, RT_SCOPE_LINK);
+        assertNotEqual(0, RT_SCOPE_SITE);
+
+        assertNotEqual(0, IFA_F_DEPRECATED);
+        assertNotEqual(0, IFA_F_PERMANENT);
+        assertNotEqual(0, IFA_F_TENTATIVE);
+    }
+
     public void testConstructors() throws SocketException {
         LinkAddress address;