1 /*
2  * Copyright (C) 2017 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package android.net.util;
18 
19 import static org.junit.Assert.assertEquals;
20 import static org.junit.Assert.assertFalse;
21 import static org.junit.Assert.assertNotNull;
22 import static org.junit.Assert.assertNull;
23 import static org.junit.Assert.assertTrue;
24 
25 import androidx.test.filters.SmallTest;
26 import androidx.test.runner.AndroidJUnit4;
27 
28 import com.android.net.module.util.NetworkStackConstants;
29 
30 import org.junit.Test;
31 import org.junit.runner.RunWith;
32 
33 @RunWith(AndroidJUnit4.class)
34 @SmallTest
35 public class InterfaceParamsTest {
36     @Test
testNullInterfaceReturnsNull()37     public void testNullInterfaceReturnsNull() {
38         assertNull(InterfaceParams.getByName(null));
39     }
40 
41     @Test
testNonExistentInterfaceReturnsNull()42     public void testNonExistentInterfaceReturnsNull() {
43         assertNull(InterfaceParams.getByName("doesnotexist0"));
44     }
45 
46     @Test
testLoopback()47     public void testLoopback() {
48         final InterfaceParams ifParams = InterfaceParams.getByName("lo");
49         assertNotNull(ifParams);
50         assertEquals("lo", ifParams.name);
51         assertTrue(ifParams.index > 0);
52         assertNotNull(ifParams.macAddr);
53         assertFalse(ifParams.hasMacAddress);
54         assertTrue(ifParams.defaultMtu >= NetworkStackConstants.ETHER_MTU);
55     }
56 }
57