/**
* Constructs an {@link InterruptibleByteChannel} from which the deserializer to be tested can
* read its data.
*
* @param readInterruptPositions the positions after which the byte stream shall be interrupted
* @param testBufferSize the size of the test buffer to create
* @return an {@link InterruptibleByteChannel} holding the serialized data in memory
* @throws IOException thrown if an error occurs while serializing the original data
*/
private ReadableByteChannel createByteChannel(
final int[] readInterruptPositions, final int testBufferSize) throws IOException {
final TransferEnvelope te = new TransferEnvelope(SEQUENCE_NUMBER, JOB_ID, CHANNEL_ID);
if (testBufferSize >= 0) {
if (testBufferSize > 100) {
throw new IllegalStateException("Test buffer size can be 100 bytes at most");
}
final Queue<MemorySegment> bufferPool = new ArrayDeque<MemorySegment>();
final MemorySegment ms = new MemorySegment(new byte[TEST_BUFFER_CAPACITY]);
final MemoryBuffer buffer =
BufferFactory.createFromMemory(ms.size(), ms, new BufferPoolConnector(bufferPool));
final ByteBuffer srcBuffer = ByteBuffer.allocate(testBufferSize);
for (int i = 0; i < testBufferSize; ++i) {
srcBuffer.put((byte) i);
}
srcBuffer.flip();
buffer.write(srcBuffer);
buffer.flip();
te.setBuffer(buffer);
}
final DefaultSerializer ds = new DefaultSerializer();
ds.setTransferEnvelope(te);
final InterruptibleByteChannel ibc = new InterruptibleByteChannel(null, readInterruptPositions);
while (ds.write(ibc)) ;
ibc.switchToReadPhase();
return ibc;
}
