def test_alreadyinuse(self):
"""Test 'already in use' warning"""
GPIO.setwarnings(False)
with open('/sys/class/gpio/export','wb') as f:
f.write(str(LED_PIN_BCM).encode())
with open('/sys/class/gpio/gpio%s/direction'%LED_PIN_BCM,'wb') as f:
f.write(b'out')
with open('/sys/class/gpio/gpio%s/value'%LED_PIN_BCM,'wb') as f:
f.write(b'1')
with warnings.catch_warnings(record=True) as w:
GPIO.setup(LED_PIN, GPIO.OUT) # generate 'already in use' warning
self.assertEqual(len(w),0) # should be no warnings
with open('/sys/class/gpio/unexport','wb') as f:
f.write(str(LED_PIN_BCM).encode())
GPIO.cleanup()
GPIO.setwarnings(True)
with open('/sys/class/gpio/export','wb') as f:
f.write(str(LED_PIN_BCM).encode())
with open('/sys/class/gpio/gpio%s/direction'%LED_PIN_BCM,'wb') as f:
f.write(b'out')
with open('/sys/class/gpio/gpio%s/value'%LED_PIN_BCM,'wb') as f:
f.write(b'1')
with warnings.catch_warnings(record=True) as w:
GPIO.setup(LED_PIN, GPIO.OUT) # generate 'already in use' warning
self.assertEqual(w[0].category, RuntimeWarning)
with open('/sys/class/gpio/unexport','wb') as f:
f.write(str(LED_PIN_BCM).encode())
GPIO.cleanup()
def test_cleanupwarning(self):
"""Test initial GPIO.cleanup() produces warning"""
GPIO.setwarnings(False)
GPIO.setup(SWITCH_PIN, GPIO.IN)
with warnings.catch_warnings(record=True) as w:
GPIO.cleanup()
self.assertEqual(len(w),0) # no warnings
GPIO.cleanup()
self.assertEqual(len(w),0) # no warnings
GPIO.setwarnings(True)
GPIO.setup(SWITCH_PIN, GPIO.IN)
with warnings.catch_warnings(record=True) as w:
GPIO.cleanup()
self.assertEqual(len(w),0) # no warnings
GPIO.cleanup()
self.assertEqual(w[0].category, RuntimeWarning) # a warning
