| /* |
| * Copyright 2015-present Open Networking Foundation |
| * |
| * 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 org.onlab.packet; |
| |
| import java.nio.ByteBuffer; |
| |
| import static junit.framework.TestCase.fail; |
| import static org.junit.Assert.assertTrue; |
| |
| /** |
| * Utilities for testing packet methods. |
| */ |
| public final class PacketTestUtils { |
| |
| private PacketTestUtils() { |
| } |
| |
| /** |
| * Tests that the Deserializer function is resilient to bad input parameters |
| * such as null input, negative offset and length, etc. |
| * |
| * @param deserializer deserializer function to test |
| */ |
| public static void testDeserializeBadInput(Deserializer deserializer) { |
| byte[] bytes = ByteBuffer.allocate(4).array(); |
| |
| try { |
| deserializer.deserialize(null, 0, 4); |
| fail("NullPointerException was not thrown"); |
| } catch (NullPointerException e) { |
| assertTrue(true); |
| } catch (DeserializationException e) { |
| fail("NullPointerException was not thrown"); |
| } |
| |
| // input byte array length, offset and length don't make sense |
| expectDeserializationException(deserializer, bytes, -1, 0); |
| expectDeserializationException(deserializer, bytes, 0, -1); |
| expectDeserializationException(deserializer, bytes, 0, 5); |
| expectDeserializationException(deserializer, bytes, 2, 3); |
| expectDeserializationException(deserializer, bytes, 5, 0); |
| } |
| |
| /** |
| * Tests that the Deserializer function is resilient to truncated input, or |
| * cases where the input byte array does not contain enough bytes to |
| * deserialize the packet. |
| * |
| * @param deserializer deserializer function to test |
| * @param header byte array of a full-size packet |
| */ |
| public static void testDeserializeTruncated(Deserializer deserializer, |
| byte[] header) { |
| byte[] truncated; |
| |
| for (int i = 0; i < header.length; i++) { |
| truncated = new byte[i]; |
| |
| ByteBuffer.wrap(header).get(truncated); |
| |
| expectDeserializationException(deserializer, truncated, 0, truncated.length); |
| } |
| } |
| |
| /** |
| * Run the given deserializer function against the given inputs and verify |
| * that a DeserializationException is thrown. The the test will fail if a |
| * DeserializationException is not thrown by the deserializer function. |
| * |
| * @param deserializer deserializer function to test |
| * @param bytes input byte array |
| * @param offset input offset |
| * @param length input length |
| */ |
| public static void expectDeserializationException(Deserializer deserializer, |
| byte[] bytes, int offset, int length) { |
| try { |
| deserializer.deserialize(bytes, offset, length); |
| fail("DeserializationException was not thrown"); |
| } catch (DeserializationException e) { |
| assertTrue(true); |
| } |
| } |
| } |