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#!/usr/bin/env python
import unittest
import serial, time
#of which port should the tests be performed:
PORT=0
#for all these tests a simple hardware is requires.
#Loopback adapter:
#shortcut these pin pairs on a 9 pole DSUB: (2-3) (4-6) (7-8)
#
# TX -\
# RX -/
#
# RTS -\
# CTS -/
#
# DTR -\
# DSR -/
#
# GND
# RI
#
class TestNonblocking(unittest.TestCase):
"""Test with timeouts"""
timeout=0
def setUp(self):
self.s = serial.Serial(PORT,timeout=self.timeout)
def tearDown(self):
self.s.close()
def test1_ReadEmpty(self):
"""After port open, the input buffer must be empty"""
self.failUnless(self.s.read(1)=='', "expected empty buffer")
def test2_Loopback(self):
"""With the Loopback HW, heach sent character should return"""
for c in map(chr,range(256)):
self.s.write(c)
time.sleep(0.02) #there migh be a small delay until the character is ready
self.failUnless(self.s.read(1)==c, "expected an '%s' which was written before" % c)
self.failUnless(self.s.read(1)=='', "expected empty buffer after all sent chars are read")
def test2_LoopbackTimeout(self):
"""test the timeout/immediate return, and that partial results are returned"""
self.s.write("HELLO")
time.sleep(0.02) #there migh be a small delay until the character is ready
#read more characters as are available to run in the timeout
self.failUnless(self.s.read(10)=='HELLO', "expected an 'HELLO' wich was written before")
self.failUnless(self.s.read(1)=='', "expected empty buffer after all sent chars are read")
class TestTimeout(TestNonblocking):
"""Same tests as the NonBlocking ones but this time with timeout"""
timeout=1
class TestForever(unittest.TestCase):
"""Tests for a posrt with no timeout"""
class TestDataWires(unittest.TestCase):
"""Test modem control lines"""
def setUp(self):
self.s = serial.Serial(PORT)
def tearDown(self):
self.s.close()
def test1_RTS(self):
self.s.setRTS(0)
self.failUnless(self.s.getCTS()==0, "CTS -> 0")
self.s.setRTS(1)
self.failUnless(self.s.getCTS()==0, "CTS -> 1")
def test2_DTR(self):
self.s.setDTR(0)
self.failUnless(self.s.getDSR()==0, "DSR -> 0")
self.s.setDTR(1)
self.failUnless(self.s.getDSR()==0, "DSR -> 1")
## def test3_RI(self):
## self.failUnless(self.s.getRI()==0, "RI -> 0")
if __name__ == '__main__':
# When this module is executed from the command-line, run all its tests
unittest.main()
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