def test_constructor(self):
"Constructor with valid and invalid configuration"
with self.assertRaises(TypeError):
l = Clock('8')
with self.assertRaises(ValueError):
l = Clock(-1)
with self.assertRaises(ValueError):
l = Clock(limits.MIN_FREQUENCY - 1)
with self.assertRaises(ValueError):
l = Clock(limits.MAX_FREQUENCY + 1)
valid_f = (limits.MAX_FREQUENCY - limits.MIN_FREQUENCY) / 2
with self.assertRaises(TypeError):
l = Clock(valid_f, '8')
with self.assertRaises(TypeError):
l = Clock(valid_f, -1)
with self.assertRaises(TypeError):
l = Clock(valid_f, 2)
l = Clock(limits.MIN_FREQUENCY, 1)
self.assertTrue(l.size() == 1 and l.read() == 1
and l.frequency() == limits.MIN_FREQUENCY)
l = Clock(limits.MAX_FREQUENCY)
self.assertTrue(l.size() == 1 and l.read() == 0
and l.frequency() == limits.MAX_FREQUENCY)
def test_size(self):
"Valid bus size presented"
l = Clock(50)
self.assertTrue(l.size() == 1)