def test_triangle(self):
"""Test triangle wave."""
amp = 0.5
freq = 0.2
samples = 101
times, dt = np.linspace(0, 10, samples, retstep=True)
triangle_arr = continuous.triangle(times, amp=amp, freq=freq)
# with new phase
triangle_arr_phased = continuous.triangle(times,
amp=amp,
freq=freq,
phase=np.pi / 2)
self.assertEqual(triangle_arr.dtype, np.complex_)
self.assertAlmostEqual(triangle_arr[0], 0.0)
# test slope
self.assertAlmostEqual((triangle_arr[1] - triangle_arr[0]) / dt,
4 * amp * freq)
self.assertAlmostEqual(triangle_arr[12], 0.48)
self.assertAlmostEqual(triangle_arr[13], 0.48)
self.assertAlmostEqual(triangle_arr[50], 0.0)
self.assertAlmostEqual(triangle_arr_phased[0], amp)
# Assert bounded between -amp and amp
self.assertTrue(np.all((-amp <= triangle_arr) & (triangle_arr <= amp)))
self.assertEqual(len(triangle_arr), samples)
def test_triangle(self):
"""Test discrete sampled triangle wave."""
amp = 0.5
freq = 0.2
duration = 10
times = np.arange(0, duration) + 0.5
triangle_ref = continuous.triangle(times, amp=amp, freq=freq)
triangle_pulse = library.triangle(duration, amp=amp, freq=freq)
self.assertIsInstance(triangle_pulse, Waveform)
np.testing.assert_array_almost_equal(triangle_pulse.samples, triangle_ref)
# test single cycle
cycle_freq = 1./duration
triangle_cycle_ref = continuous.triangle(times, amp=amp, freq=cycle_freq)
triangle_cycle_pulse = library.triangle(duration, amp=amp)
np.testing.assert_array_equal(triangle_cycle_pulse.samples, triangle_cycle_ref)
def test_period_deprecation_warning(self):
"""Tests for DeprecationWarning"""
amp = 0.5
period = 5.
samples = 101
times, _ = np.linspace(0, 10, samples, retstep=True)
self.assertWarns(
DeprecationWarning,
lambda: continuous.triangle(times, amp=amp, period=period))
self.assertWarns(
DeprecationWarning,
lambda: continuous.sawtooth(times, amp=amp, period=period))
self.assertWarns(
DeprecationWarning,
lambda: continuous.square(times, amp=amp, period=period))
