/*
* Copyright 2016-present Facebook, Inc.
*
* 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.facebook.buck.macho;
import static org.hamcrest.Matchers.equalTo;
import static org.hamcrest.Matchers.equalToObject;
import static org.junit.Assert.assertThat;
import com.google.common.primitives.UnsignedInteger;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import org.junit.Test;
public class LinkEditDataCommandTest {
@Test
public void testCreatingFromBytesBigEndian() throws Exception {
ByteBuffer buffer =
ByteBuffer.wrap(LinkEditCommandTestData.getCodeSignBigEndian()).order(ByteOrder.BIG_ENDIAN);
LinkEditDataCommand command = LinkEditDataCommandUtils.createFromBuffer(buffer);
LinkEditCommandTestData.checkValues(command);
}
@Test
public void testCreatingFromBytesLittleEndian() throws Exception {
ByteBuffer buffer =
ByteBuffer.wrap(LinkEditCommandTestData.getCodeSignLittleEndian())
.order(ByteOrder.LITTLE_ENDIAN);
LinkEditDataCommand command = LinkEditDataCommandUtils.createFromBuffer(buffer);
LinkEditCommandTestData.checkValues(command);
}
@Test
public void testUpdatingLinkEditDataCommandInByteBuffer() throws Exception {
LinkEditDataCommand command =
LinkEditDataCommandUtils.createFromBuffer(
ByteBuffer.wrap(LinkEditCommandTestData.getCodeSignBigEndian())
.order(ByteOrder.BIG_ENDIAN));
UnsignedInteger newValue = UnsignedInteger.fromIntBits(0xFE);
LinkEditDataCommand updated = command.withDataoff(newValue);
ByteBuffer buffer =
ByteBuffer.allocate(command.getLoadCommandCommonFields().getCmdsize().intValue())
.order(ByteOrder.BIG_ENDIAN);
LinkEditDataCommandUtils.updateLinkEditDataCommand(buffer, command, updated);
buffer.position(0);
LinkEditDataCommand commandCreatedFromBuffer =
LinkEditDataCommandUtils.createFromBuffer(buffer);
ByteBuffer newBuffer =
ByteBuffer.allocate(
commandCreatedFromBuffer.getLoadCommandCommonFields().getCmdsize().intValue())
.order(ByteOrder.BIG_ENDIAN);
LinkEditDataCommandUtils.writeCommandToBuffer(commandCreatedFromBuffer, newBuffer);
assertThat(commandCreatedFromBuffer.getDataoff(), equalToObject(newValue));
assertThat(buffer.array(), equalTo(newBuffer.array()));
}
}