def test_shift_serie():
"""Test the routine for shifting."""
# Create a synthetic signal
signal = np.arange(5)
# Create a shift of 0
shift = 0
signal_shift = StandardTimeNormalization._shift_serie(signal, shift)
# Check the signal
assert_array_equal(signal_shift, signal)
# Create a shift of 2
shift = 2
signal_shift = StandardTimeNormalization._shift_serie(signal, shift)
# Check the signal
gt_signal = np.array([0, 0, 0, 1, 2])
assert_array_equal(signal_shift, gt_signal)
# Create a shift of -2
shift = -2
signal_shift = StandardTimeNormalization._shift_serie(signal, shift)
# Check the signal
gt_signal = np.array([2, 3, 4, 4, 4])
assert_array_equal(signal_shift, gt_signal)
