1/*
2 * Copyright (C) 2016 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
17package com.android.server.wifi.hotspot2.anqp;
18
19import static org.junit.Assert.assertEquals;
20import static org.junit.Assert.assertNull;
21
22import android.test.suitebuilder.annotation.SmallTest;
23
24import org.junit.Test;
25
26import java.net.ProtocolException;
27import java.nio.BufferUnderflowException;
28import java.nio.ByteBuffer;
29import java.util.ArrayList;
30import java.util.List;
31
32/**
33 * Unit tests for {@link com.android.server.wifi.hotspot2.anqp.CellularNetwork}.
34 */
35@SmallTest
36public class CellularNetworkTest {
37    private static final byte[] TEST_PLMN_BYTES_1 = new byte[] {0x12, 0x34, 0x56};
38    private static final String TEST_PLMN_STRING_1 = "214653";
39    private static final byte[] TEST_PLMN_BYTES_2 = new byte[] {0x13, (byte) 0xF9, 0x32};
40    private static final String TEST_PLMN_STRING_2 = "31923";
41
42    /**
43     * Verify that BufferUnderflowException will be thrown when parsing an empty buffer.
44     *
45     * @throws Exception
46     */
47    @Test(expected = BufferUnderflowException.class)
48    public void parseBufferWithEmptyBuffer() throws Exception {
49        CellularNetwork.parse(ByteBuffer.allocate(0));
50    }
51
52    /**
53     * Verify that a null will be returned when parsing a buffer contained an unsupported IEI type.
54     *
55     * @throws Exception
56     */
57    @Test
58    public void parseBufferWithInvalidIEIType() throws Exception {
59        byte[][] plmnsData = new byte[][] {TEST_PLMN_BYTES_1, TEST_PLMN_BYTES_2};
60        byte[] testData = CellularNetworkTestUtil.formatPLMNListIEI(1, plmnsData);
61        assertNull(CellularNetwork.parse(ByteBuffer.wrap(testData)));
62    }
63
64    /**
65     * Verify that BufferUnderflowException will be thrown when parsing a truncated buffer
66     * (missing a byte at the end).
67     *
68     * @throws Exception
69     */
70    @Test(expected = BufferUnderflowException.class)
71    public void parseBufferWithIncompleteData() throws Exception {
72        byte[][] plmnsData = new byte[][] {TEST_PLMN_BYTES_1, TEST_PLMN_BYTES_2};
73        byte[] testData = CellularNetworkTestUtil.formatPLMNListIEI(plmnsData);
74        CellularNetwork.parse(ByteBuffer.wrap(testData, 0, testData.length - 1));
75    }
76
77    /**
78     * Verify that ProtocolException will be thrown when IEI size and the PLMN count doesn't
79     * match.
80     *
81     * @throws Exception
82     */
83    @Test(expected = ProtocolException.class)
84    public void parseBufferWithMismatchIEISizeAndPLMNCount() throws Exception {
85        byte[][] plmnsData = new byte[][] {TEST_PLMN_BYTES_1, TEST_PLMN_BYTES_2};
86        // Get test data with IEI size set to incorrect value.
87        byte[] testData = CellularNetworkTestUtil.formatPLMNListIEI(
88                CellularNetwork.IEI_TYPE_PLMN_LIST, plmnsData, true);
89        CellularNetwork.parse(ByteBuffer.wrap(testData));
90    }
91
92    /**
93     * Verify that the expected ProtocolPortTuple is returned when parsing a buffer contained
94     * the test data.
95     *
96     * @throws Exception
97     */
98    @Test
99    public void parseBufferWithTestData() throws Exception {
100        byte[][] plmnsData = new byte[][] {TEST_PLMN_BYTES_1, TEST_PLMN_BYTES_2};
101        byte[] testData = CellularNetworkTestUtil.formatPLMNListIEI(plmnsData);
102
103        // Setup the expected CellularNetwork.
104        List<String> plmnList = new ArrayList<>();
105        plmnList.add(TEST_PLMN_STRING_1);
106        plmnList.add(TEST_PLMN_STRING_2);
107        CellularNetwork expected = new CellularNetwork(plmnList);
108
109        assertEquals(expected, CellularNetwork.parse(ByteBuffer.wrap(testData)));
110    }
111}
112