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/*
* Copyright (C) 2017 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.server.wifi.hotspot2.anqp;
import static org.junit.Assert.assertEquals;
import android.net.wifi.WifiSsid;
import androidx.test.filters.SmallTest;
import com.android.server.wifi.WifiBaseTest;
import org.junit.Test;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.net.ProtocolException;
import java.nio.BufferUnderflowException;
import java.nio.ByteBuffer;
import java.nio.charset.StandardCharsets;
import java.util.Arrays;
import java.util.List;
/**
* Unit tests for {@link com.android.server.wifi.hotspot2.anqp.HSOsuProvidersElement}.
*/
@SmallTest
public class HSOsuProvidersElementTest extends WifiBaseTest {
private static final byte[] TEST_OSU_SSID_BYTES = "Test SSID".getBytes(StandardCharsets.UTF_8);
private static final WifiSsid TEST_OSU_SSID =
WifiSsid.createFromByteArray(TEST_OSU_SSID_BYTES);
private static final List<OsuProviderInfo> TEST_PROVIDER_LIST =
Arrays.asList(OsuProviderInfoTestUtil.TEST_OSU_PROVIDER_INFO);
private static final HSOsuProvidersElement TEST_OSU_PROVIDERS_ELEMENT =
new HSOsuProvidersElement(TEST_OSU_SSID, TEST_PROVIDER_LIST);
/**
* Utility function for generating test data.
*
* @param osuSsidBytes The OSU SSID bytes
* @return byte[]
*/
private static byte[] getTestData(byte[] osuSsidBytes) {
try {
ByteArrayOutputStream out = new ByteArrayOutputStream();
out.write((byte) osuSsidBytes.length);
out.write(osuSsidBytes);
out.write((byte) TEST_PROVIDER_LIST.size());
out.write(OsuProviderInfoTestUtil.TEST_OSU_PROVIDER_INFO_RAW_BYTES);
return out.toByteArray();
} catch (IOException e) {
return null;
}
}
/**
* Verify that BufferUnderflowException will be thrown when parsing an empty buffer.
* @throws Exception
*/
@Test(expected = BufferUnderflowException.class)
public void parseEmptyBuffer() throws Exception {
HSOsuProvidersElement.parse(ByteBuffer.allocate(0));
}
/**
* Verify that BufferUnderflowException will be thrown when parsing a truncated buffer
* (missing a byte at the end).
*
* @throws Exception
*/
@Test(expected = BufferUnderflowException.class)
public void parseTruncatedBuffer() throws Exception {
ByteBuffer buffer = ByteBuffer.wrap(getTestData(TEST_OSU_SSID_BYTES));
buffer.limit(buffer.remaining() - 1);
HSOsuProvidersElement.parse(buffer);
}
/**
* Verify that ProtocolException will be thrown when parsing a buffer containing an
* invalid OSU SSID.
*
* @throws Exception
*/
@Test(expected = ProtocolException.class)
public void parseBufferWithInvalidLength() throws Exception {
byte[] invalidSsidBytes = new byte[HSOsuProvidersElement.MAXIMUM_OSU_SSID_LENGTH + 1];
ByteBuffer buffer = ByteBuffer.wrap(getTestData(invalidSsidBytes));
HSOsuProvidersElement.parse(buffer);
}
/**
* Verify that an expected {@link HSOsuProvidersElement} will be returned when parsing a buffer
* containing pre-defined test data.
*
* @throws Exception
*/
@Test
public void parseBufferWithTestData() throws Exception {
ByteBuffer buffer = ByteBuffer.wrap(getTestData(TEST_OSU_SSID_BYTES));
assertEquals(TEST_OSU_PROVIDERS_ELEMENT, HSOsuProvidersElement.parse(buffer));
}
}
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