def test_Frequency():
"""Test frequency representation object"""
tuc = ts.time_unit_conversion
for unit in ['ns', 'ms', 's', None]:
f = ts.Frequency(1, time_unit=unit)
npt.assert_equal(f.to_period(), tuc[unit])
f = ts.Frequency(1000, time_unit=unit)
npt.assert_equal(f.to_period(), tuc[unit] / 1000)
f = ts.Frequency(0.001, time_unit=unit)
npt.assert_equal(f.to_period(), tuc[unit] * 1000)
def test_UniformTime():
tuc = ts.time_unit_conversion
for unit, duration in zip(['ns', 'ms', 's', None],
[2 * 10 ** 9, 2 * 10 ** 6, 100, 20]):
t1 = ts.UniformTime(duration=duration, sampling_rate=1,
time_unit=unit)
t2 = ts.UniformTime(duration=duration, sampling_rate=20,
time_unit=unit)
#The following two tests verify that first-last are equal to the
#duration, but it is unclear whether that is really the behavior we
#want, because the t_i held by a TimeSeries is the left
#(smaller) side of the time-duration defined by the bin
#The difference between the first and last item is the duration:
#npt.assert_equal(t1[-1]-t1[0],
# ts.TimeArray(duration,time_unit=unit))
#Duration doesn't depend on the sampling rate:
#npt.assert_equal(t1[-1]-t2[0],
# ts.TimeArray(duration,time_unit=unit))
a = ts.UniformTime(duration=10, sampling_rate=1)
b = ts.UniformTime(a, time_unit=unit)
npt.assert_equal(a.sampling_interval, b.sampling_interval)
npt.assert_equal(a.sampling_rate, b.sampling_rate)
b = ts.UniformTime(a, duration=2 * duration, time_unit=unit)
npt.assert_equal(a.sampling_interval, b.sampling_interval)
npt.assert_equal(a.sampling_rate, b.sampling_rate)
b = ts.UniformTime(a, length=100, time_unit=unit)
npt.assert_equal(a.sampling_interval, b.sampling_interval)
npt.assert_equal(a.sampling_rate, b.sampling_rate)
b = ts.UniformTime(a, length=100, time_unit=unit)
npt.assert_equal(a.sampling_interval, b.sampling_interval)
npt.assert_equal(a.sampling_rate, b.sampling_rate)
b = ts.UniformTime(a, length=100, duration=duration, time_unit=unit)
c = ts.UniformTime(length=100, duration=duration, time_unit=unit)
npt.assert_equal(c, b)
b = ts.UniformTime(sampling_interval=1, duration=10, time_unit=unit)
c = ts.UniformTime(sampling_rate=tuc['s'] / tuc[unit],
length=10, time_unit=unit)
npt.assert_equal(c, b)
#This should raise a value error, because the duration is shorter than
#the sampling_interval:
npt.assert_raises(ValueError,
ts.UniformTime,
dict(sampling_interval=10, duration=1))
#Time objects can be initialized with other time objects setting the
#duration, sampling_interval and sampling_rate:
a = ts.UniformTime(length=1, sampling_rate=1)
npt.assert_raises(ValueError, ts.UniformTime, dict(data=a,
sampling_rate=10, sampling_interval=.1))
b = ts.UniformTime(duration=2 * a.sampling_interval,
sampling_rate=2 * a.sampling_rate)
npt.assert_equal(ts.Frequency(b.sampling_rate),
ts.Frequency(2 * a.sampling_rate))
npt.assert_equal(b.sampling_interval,
ts.TimeArray(0.5 * a.sampling_rate))
b = ts.UniformTime(duration=10,
sampling_interval=a.sampling_interval)
npt.assert_equal(b.sampling_rate, a.sampling_rate)
b = ts.UniformTime(duration=10,
sampling_rate=a.sampling_rate)
npt.assert_equal(b.sampling_interval, a.sampling_interval)
# make sure the t0 ando other attribute is copied
a = ts.UniformTime(length=1, sampling_rate=1)
b = a.copy()
npt.assert_equal(b.duration, a.duration)
npt.assert_equal(b.sampling_rate, a.sampling_rate)
npt.assert_equal(b.sampling_interval, a.sampling_interval)
npt.assert_equal(b.t0, a.t0)