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FrameReceiver_test.cpp
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/*
* FrameReceiver_test.cpp
*
* Created on: Sep 22, 2015
* Author: peter
*/
#include <boost/test/unit_test.hpp>
#include "FrameReceiver.h"
#include "RingBufferReader.h"
#include "EscapingSource.h"
#include "FrameBuffer.h"
#include "FrameBufferUserFrameHandler.h"
#include "SequenceNumber.h"
namespace hdlc {
BOOST_AUTO_TEST_CASE( test_FrameReceiver_receives_frame ) {
RingBuffer<64> medium;
RingBufferReader tmp = RingBufferReader(medium);
FrameBuffer frameBuffer;
EscapingSource source = EscapingSource(tmp);
FrameBufferUserFrameHandler handler(frameBuffer);
FrameReceiver receiver(source);
receiver.setFrameHandler(&handler);
medium.put(EscapingSource::FLAG); // flag
uint16_t crc = 0xFFFF;
medium.put(0x00); // expected sequence number
crc_ccitt_update(crc, 0x00);
medium.put(0x42); // data
crc_ccitt_update(crc, 0x42);
medium.put(crc >> 8); // crc msb
medium.put(crc & 0xFF); // crc lsb
medium.put(EscapingSource::FLAG); // flag
while(!medium.isEmpty()) {
source.schedule();
receiver.schedule();
}
BOOST_CHECK(frameBuffer.size() == 1);
}
BOOST_AUTO_TEST_CASE( test_FrameReceiver_ignores_empty_frames ) {
RingBuffer<64> medium;
RingBufferReader tmp = RingBufferReader(medium);
FrameBuffer frameBuffer;
EscapingSource source = EscapingSource(tmp);
FrameBufferUserFrameHandler handler(frameBuffer);
FrameReceiver receiver(source);
receiver.setFrameHandler(&handler);
medium.put(EscapingSource::FLAG); // flag
medium.put(EscapingSource::FLAG); // flag
while(!medium.isEmpty()) {
source.schedule();
receiver.schedule();
}
BOOST_CHECK(frameBuffer.size() == 0);
}
BOOST_AUTO_TEST_CASE( test_FrameReceiver_ignores_frames_with_bad_crc ) {
RingBuffer<64> medium;
RingBufferReader tmp = RingBufferReader(medium);
FrameBuffer frameBuffer;
EscapingSource source = EscapingSource(tmp);
FrameBufferUserFrameHandler handler(frameBuffer);
FrameReceiver receiver(source);
receiver.setFrameHandler(&handler);
medium.put(EscapingSource::FLAG); // flag
uint16_t crc = 0xFFFF;
medium.put(0x00); // expected sequence number
crc_ccitt_update(crc, 0x00);
medium.put(0x42); // data
crc_ccitt_update(crc, 0x42);
crc ^= 0x01; // corrupted crc
medium.put(crc >> 8); // crc msb
medium.put(crc & 0xFF); // crc lsb
medium.put(EscapingSource::FLAG); // flag
while(!medium.isEmpty()) {
source.schedule();
receiver.schedule();
}
BOOST_CHECK(frameBuffer.size() == 0);
}
BOOST_AUTO_TEST_CASE( test_FrameReceiver_receives_multiple_frames ) {
RingBuffer<64> medium;
RingBufferReader tmp = RingBufferReader(medium);
FrameBuffer frameBuffer;
EscapingSource source = EscapingSource(tmp);
FrameBufferUserFrameHandler handler(frameBuffer);
FrameReceiver receiver(source);
receiver.setFrameHandler(&handler);
uint8_t count = 7;
for(int i = 0; i < count; i++) {
medium.put(EscapingSource::FLAG); // flag
uint16_t crc = 0xFFFF;
medium.put(0x00 + i); // expected sequence number
crc_ccitt_update(crc, 0x00 + i);
medium.put(i); // data
crc_ccitt_update(crc, i);
medium.put(crc >> 8); // crc msb
medium.put(crc & 0xFF); // crc lsb
medium.put(EscapingSource::FLAG); // flag
}
while(!medium.isEmpty()) {
source.schedule();
receiver.schedule();
}
BOOST_CHECK(frameBuffer.size() == count);
}
class AckFrameHandler : public FrameHandler {
public:
SequenceNumber lastAckReceived;
virtual void handle(const uint8_t header, const uint8_t* payload, const uint8_t payloadSize) {
lastAckReceived = header;
}
};
BOOST_AUTO_TEST_CASE( test_FrameReceiver_recognizes_ack_frames ) {
RingBuffer<64> medium;
RingBufferReader tmp = RingBufferReader(medium);
EscapingSource source = EscapingSource(tmp);
AckFrameHandler handler;
FrameReceiver receiver(source);
receiver.setFrameHandler(&handler);
medium.put(EscapingSource::FLAG); // flag
uint16_t crc = 0xFFFF;
medium.put(FrameReceiver::ACK + 0x24); // ack with sequence number
crc_ccitt_update(crc, FrameReceiver::ACK + 0x24);
medium.put(crc >> 8); // crc msb
medium.put(crc & 0xFF); // crc lsb
medium.put(EscapingSource::FLAG); // flag
while(!medium.isEmpty()) {
source.schedule();
receiver.schedule();
}
BOOST_CHECK(0x24 == handler.lastAckReceived);
}
} /* namespace hdlc */