Test plot.

Author: Danilo Ferreira de Lima

tests/test_applications_grating.py

@@ -41,6 +41,8 @@ def test_grating_1d_fit():
 
     cal.fit()
 
+    cal.plot()
+
     assert np.isclose(cal.e0, true_offset, atol=1e-2, rtol=1e-2)
     assert np.isclose(cal.slope, true_slope, atol=1e-2, rtol=1e-2)