def test_TestTriggerTimer(self):
ECHO = 24
TRIG = 23
GPIOInterface.cleanup()
# 24 start false
GPIOInterface.testSetInput(ECHO,False)
self.assertEqual(False,GPIOInterface.input(ECHO),"Echo pin should be Low")
# Check not triggered
self.assertEqual(False,GPIOInterface.triggerTimerStarted,"Trigger timer should not be started")
# Pulse triggers
GPIOInterface.output(TRIG, False)
GPIOInterface.output(TRIG, True)
time.sleep(0.00001)
GPIOInterface.output(TRIG, False)
timeAfterTrigger = time.time()
# Check triggered
self.assertEqual(True,GPIOInterface.triggerTimerStarted,"Trigger timer should have been started")
# Not yet in echo pulse
self.assertEqual(False,GPIOInterface.pulseTimerStarted,"Echo pulse timer should not be started yet")
# Wait for start of echo pulse
while GPIOInterface.input(ECHO)==0:
#print "Waiting for echo timer to expire"
timeStartOfEcho = time.time()
delayBeforeEchoStart = timeStartOfEcho - timeAfterTrigger
self.assertTrue(delayBeforeEchoStart > 0.25,"Delay before Echo start should be at least 0.25 seconds")
self.assertTrue(delayBeforeEchoStart < 0.3, "Delay before Echo start should be less than 0.3 seconds")
#Timer has expired and changes echo to true
self.assertEqual(True,GPIOInterface.input(ECHO),"Echo has started, pin 24 should be high")
# Pulse timer has started
self.assertEqual(True,GPIOInterface.pulseTimerStarted,"Pulse timer should have started")
# Wait during Echo pulse
while GPIOInterface.input(ECHO)==1:
timeEndOfEcho = time.time()
# print "Waiting for pulse timer to expire"
self.assertEqual(False,GPIOInterface.pulseTimerStarted,"Pulse timer should have expired")
self.assertEqual(False,GPIOInterface.triggerTimerStarted,"Trigger timer should still be expire")
lengthOfEcho =timeEndOfEcho - timeStartOfEcho
self.assertTrue(lengthOfEcho > 0.24,"Duration of Echo pulse should be at least 0.24 seconds")
def test_InputCanBeSetToTrue(self):
GPIOInterface.cleanup()
GPIOInterface.testSetInput(23,True)
self.assertEqual(True,GPIOInterface.input(23))
def test_InputDefaultIsFalse(self):
GPIOInterface.cleanup()
self.assertEqual(False,GPIOInterface.input(23))