def test_field_retrieval(self):
"""
Test that input fields can be retrieved
"""
SAMPLE_NR, SAMPLERATE = 1234.5678, 1000
ts = uts.Timedelta(SAMPLE_NR, SAMPLERATE)
self.assertEqual(SAMPLE_NR, ts.sample_nr)
self.assertEqual(SAMPLERATE, ts.samplerate)
def test_samplerate_conversion(self):
"""
Check that time * samplerate = num_samples
"""
NUM_ITERS = 100
for _ in range(NUM_ITERS):
SAMPLE_NR = random.randint(0, 1e15)
SAMPLERATE = random.randint(0, 1e14)
ts = uts.Timedelta(SAMPLE_NR, SAMPLERATE)
# ignore all decimal noise, integer parts must be same
self.assertAlmostEqual(SAMPLE_NR,
ts.total_seconds * SAMPLERATE,
places=0)
def test_neg_sn(self):
"""
Modulo arithmetic can be tricky if sample nr is negative.
This test ensures proper behaviour (symmetrical around zero)
"""
NUM_ITERS = 1000
for _ in range(NUM_ITERS):
SAMPLE_NR = random.randint(0, 1e15)
SAMPLE_NR_NEG = -SAMPLE_NR
SAMPLERATE = random.randint(0, 1e10)
ts = uts.Timedelta(SAMPLE_NR, SAMPLERATE)
ts_neg = uts.Timedelta(SAMPLE_NR_NEG, SAMPLERATE)
#
d, h, m, s, mms = ts.as_tuple()
d_neg, h_neg, m_neg, s_neg, mms_neg = ts_neg.as_tuple()
#
self.assertEqual(d, -d_neg)
self.assertEqual(h, -h_neg)
self.assertEqual(m, -m_neg)
self.assertEqual(s, -s_neg)
self.assertEqual(mms, -mms_neg)
self.assertEqual("-" + str(ts), str(ts_neg))
def test_time_decomposition(self):
"""
Check for some random numbers that the decomposition works.
"""
NUM_ITERS = 100
for _ in range(NUM_ITERS):
SAMPLE_NR = random.randint(-1e15, 1e15)
SAMPLERATE = random.randint(0, 1e10)
ts = uts.Timedelta(SAMPLE_NR, SAMPLERATE)
d, h, m, s, mms = ts.as_tuple()
total = ts.total_seconds
recomp = mms * 1e-6 + s + m * 60 + h * 3600 + d * 24 * 3600
#
self.assertAlmostEqual(total, recomp, places=3)
def test_set_error(self):
"""
Property attributes can't be set
"""
SAMPLE_NR, SAMPLERATE = 1234.5678, 1000
ts = uts.Timedelta(SAMPLE_NR, SAMPLERATE)
# setting these attributes will trigger the exception
with self.assertRaises(AttributeError):
ts.sample_nr = None
with self.assertRaises(AttributeError):
ts.samplerate = None
with self.assertRaises(AttributeError):
ts.total_seconds = None
ts.days = None
with self.assertRaises(AttributeError):
ts.hours = None
with self.assertRaises(AttributeError):
ts.mins = None
with self.assertRaises(AttributeError):
ts.secs = None
with self.assertRaises(AttributeError):
ts.microsecs = None