def test_n_channels(self):
test_sig_1a = Signal(np.random.rand(10))
self.assertEqual(test_sig_1a.n_channels(), 1)
test_sig_1b = Signal(np.random.rand(1,10))
self.assertEqual(test_sig_1b.n_channels(), 1)
test_sig_2 = Signal(np.random.rand(2,10))
self.assertEqual(test_sig_2.n_channels(), 2)
