/*
* Copyright 2014-2017 Real Logic Ltd.
*
* 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 io.aeron;
import org.junit.Before;
import org.junit.Test;
import org.mockito.ArgumentCaptor;
import io.aeron.logbuffer.FragmentHandler;
import io.aeron.logbuffer.FrameDescriptor;
import io.aeron.logbuffer.Header;
import io.aeron.logbuffer.LogBufferDescriptor;
import org.agrona.concurrent.UnsafeBuffer;
import java.nio.ByteOrder;
import static org.hamcrest.CoreMatchers.is;
import static org.junit.Assert.*;
import static org.mockito.Mockito.*;
public class FragmentAssemblerTest
{
private static final int SESSION_ID = 777;
private static final int INITIAL_TERM_ID = 3;
private final FragmentHandler delegateFragmentHandler = mock(FragmentHandler.class);
private final UnsafeBuffer termBuffer = mock(UnsafeBuffer.class);
private final Header header = spy(new Header(INITIAL_TERM_ID, LogBufferDescriptor.TERM_MIN_LENGTH));
private final FragmentAssembler adapter = new FragmentAssembler(delegateFragmentHandler);
@Before
public void setUp()
{
header.buffer(termBuffer);
when(termBuffer.getInt(anyInt(), any(ByteOrder.class))).thenReturn(SESSION_ID);
}
@Test
public void shouldPassThroughUnfragmentedMessage()
{
when(header.flags()).thenReturn(FrameDescriptor.UNFRAGMENTED);
final UnsafeBuffer srcBuffer = new UnsafeBuffer(new byte[128]);
final int offset = 8;
final int length = 32;
adapter.onFragment(srcBuffer, offset, length, header);
verify(delegateFragmentHandler, times(1)).onFragment(srcBuffer, offset, length, header);
}
@Test
public void shouldAssembleTwoPartMessage()
{
when(header.flags())
.thenReturn(FrameDescriptor.BEGIN_FRAG_FLAG)
.thenReturn(FrameDescriptor.END_FRAG_FLAG);
final UnsafeBuffer srcBuffer = new UnsafeBuffer(new byte[1024]);
final int offset = 0;
final int length = srcBuffer.capacity() / 2;
srcBuffer.setMemory(0, length, (byte)65);
srcBuffer.setMemory(length, length, (byte)66);
adapter.onFragment(srcBuffer, offset, length, header);
adapter.onFragment(srcBuffer, length, length, header);
final ArgumentCaptor<UnsafeBuffer> bufferArg = ArgumentCaptor.forClass(UnsafeBuffer.class);
final ArgumentCaptor<Header> headerArg = ArgumentCaptor.forClass(Header.class);
verify(delegateFragmentHandler, times(1)).onFragment(
bufferArg.capture(), eq(offset), eq(length * 2), headerArg.capture());
final UnsafeBuffer capturedBuffer = bufferArg.getValue();
for (int i = 0; i < srcBuffer.capacity(); i++)
{
assertThat("same at i=" + i, capturedBuffer.getByte(i), is(srcBuffer.getByte(i)));
}
final Header capturedHeader = headerArg.getValue();
assertThat(capturedHeader.sessionId(), is(SESSION_ID));
assertThat(capturedHeader.flags(), is(FrameDescriptor.END_FRAG_FLAG));
}
@Test
public void shouldAssembleFourPartMessage()
{
when(header.flags())
.thenReturn(FrameDescriptor.BEGIN_FRAG_FLAG)
.thenReturn((byte)0)
.thenReturn((byte)0)
.thenReturn(FrameDescriptor.END_FRAG_FLAG);
final UnsafeBuffer srcBuffer = new UnsafeBuffer(new byte[1024]);
final int offset = 0;
final int length = srcBuffer.capacity() / 4;
for (int i = 0; i < 4; i++)
{
srcBuffer.setMemory(i * length, length, (byte)(65 + i));
}
adapter.onFragment(srcBuffer, offset, length, header);
adapter.onFragment(srcBuffer, offset + length, length, header);
adapter.onFragment(srcBuffer, offset + (length * 2), length, header);
adapter.onFragment(srcBuffer, offset + (length * 3), length, header);
final ArgumentCaptor<UnsafeBuffer> bufferArg = ArgumentCaptor.forClass(UnsafeBuffer.class);
final ArgumentCaptor<Header> headerArg = ArgumentCaptor.forClass(Header.class);
verify(delegateFragmentHandler, times(1)).onFragment(
bufferArg.capture(), eq(offset), eq(length * 4), headerArg.capture());
final UnsafeBuffer capturedBuffer = bufferArg.getValue();
for (int i = 0; i < srcBuffer.capacity(); i++)
{
assertThat("same at i=" + i, capturedBuffer.getByte(i), is(srcBuffer.getByte(i)));
}
final Header capturedHeader = headerArg.getValue();
assertThat(capturedHeader.sessionId(), is(SESSION_ID));
assertThat(capturedHeader.flags(), is(FrameDescriptor.END_FRAG_FLAG));
}
@Test
public void shouldFreeSessionBuffer()
{
when(header.flags())
.thenReturn(FrameDescriptor.BEGIN_FRAG_FLAG)
.thenReturn(FrameDescriptor.END_FRAG_FLAG);
final UnsafeBuffer srcBuffer = new UnsafeBuffer(new byte[1024]);
final int offset = 0;
final int length = srcBuffer.capacity() / 2;
srcBuffer.setMemory(0, length, (byte)65);
srcBuffer.setMemory(length, length, (byte)66);
assertFalse(adapter.freeSessionBuffer(SESSION_ID));
adapter.onFragment(srcBuffer, offset, length, header);
adapter.onFragment(srcBuffer, length, length, header);
assertTrue(adapter.freeSessionBuffer(SESSION_ID));
assertFalse(adapter.freeSessionBuffer(SESSION_ID));
}
@Test
public void shouldDoNotingIfEndArrivesWithoutBegin()
{
when(header.flags()).thenReturn(FrameDescriptor.END_FRAG_FLAG);
final UnsafeBuffer srcBuffer = new UnsafeBuffer(new byte[1024]);
final int offset = 0;
final int length = srcBuffer.capacity() / 2;
adapter.onFragment(srcBuffer, offset, length, header);
verify(delegateFragmentHandler, never()).onFragment(any(), anyInt(), anyInt(), any());
}
@Test
public void shouldDoNotingIfMidArrivesWithoutBegin()
{
when(header.flags())
.thenReturn((byte)0)
.thenReturn(FrameDescriptor.END_FRAG_FLAG);
final UnsafeBuffer srcBuffer = new UnsafeBuffer(new byte[1024]);
final int offset = 0;
final int length = srcBuffer.capacity() / 2;
adapter.onFragment(srcBuffer, offset, length, header);
adapter.onFragment(srcBuffer, offset, length, header);
verify(delegateFragmentHandler, never()).onFragment(any(), anyInt(), anyInt(), any());
}
}