def test_saving_a_file(self):
x = np.linspace(-5, 5, 100)
y = x ** 2
spec = Spectrum(x, y)
filename = os.path.join(data_path, "test.dat")
spec.save(filename)
spec2 = Spectrum()
spec2.load(filename)
spec2_x, spec2_y = spec2.data
self.array_almost_equal(spec2_x, x)
self.array_almost_equal(spec2_y, y)
os.remove(filename)
