1 files changed, 42 insertions, 0 deletions
diff --git a/vespajlib/src/test/java/com/yahoo/net/LinuxInetAddressTestCase.java b/vespajlib/src/test/java/com/yahoo/net/LinuxInetAddressTestCase.java
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+++ b/vespajlib/src/test/java/com/yahoo/net/LinuxInetAddressTestCase.java
@@ -0,0 +1,42 @@
+// Copyright 2016 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+package com.yahoo.net;
+
+import java.net.UnknownHostException;
+import java.net.InetAddress;
+import java.net.Inet4Address;
+
+/**
+ * @author Simon Thoresen
+ */
+public class LinuxInetAddressTestCase extends junit.framework.TestCase {
+
+    @SuppressWarnings("deprecation")
+    public void testPreferIPv4() throws UnknownHostException {
+        try {
+            // This test only works if there is at least one inet address returned.
+            InetAddress[] arr = LinuxInetAddress.getAllLocal();
+            if (arr.length > 0) {
+                // System.out.println("Got " + arr.length + " addresses.");
+
+                // And it can only make sure it is preferred if there is at least one ip v4 address.
+                boolean ipv4 = false;
+                for (int i = 0; i < arr.length; ++i) {
+                    // System.out.println("Address " + i + " is an instance of " + arr[i].getClass() + ".");
+                    if (arr[i] instanceof Inet4Address) {
+                        ipv4 = true;
+                    }
+                }
+
+                // And the only thing we test is that an ip v4 address is preferred.
+                if (ipv4) {
+                    InetAddress addr = LinuxInetAddress.getLocalHost();
+                    assertNotNull("IPv4 is prefered", addr instanceof Inet4Address);
+                }
+            }
+        }
+        catch (java.net.UnknownHostException e) {
+            // We're on vpn or have no network
+        }
+    }
+
+}