/*
Summary: Method written to separate untested functionality from the original
send method. If the stream is valid, it gets sent to the car. If not,
the stream is set to null before it's sent. The possibility of getting
null is handled by the car.(?)
Pre-condition:
sendValid receives a stream.
Post-condition:
Either the original stream is sent, or the car receives a stream of
value null.
tc0: The stream is corrupt
tc1: The stream is empty
tc2: The stream is valid
*/
public static void sendValid(ByteArrayOutputStream stream) {
if (SensorData.isValidStream(stream)) {
dummyCar.receiveData(stream);
byte[] array = stream.toByteArray();
System.out.println("Sent data: " + Arrays.toString(array));
} else {
stream.reset();
dummyCar.receiveData(stream);
System.out.println("Empty stream sent");
}
}
/*
Summary:
Returns an object with the car's speed and angle values.
tc0: A valid packet is received
tc1: An incomplete packet or a packet of invalid length is received
tc2: A corrupt packet is received
*/
static SpeedTorqueObj receiveData() throws Exception {
ByteArrayOutputStream stream = dummyCar.getSpeedTorque();
if (SpeedTorque.isValidStream(stream)) {
return SpeedTorque.readSpeedTorque(stream);
} else {
SpeedTorqueObj invalid = new SpeedTorqueObj(-1, -1);
return invalid;
}
}