Added test case to plot vm sine

Author: FlorianPfaff

pyrecest/tests/distributions/test_toroidal_von_mises_sine_distribution.py

@@ -12,7 +12,8 @@
 from pyrecest.distributions.hypertorus.toroidal_von_mises_sine_distribution import (
     ToroidalVonMisesSineDistribution,
 )
-
+import matplotlib
+matplotlib.use("Agg")
 
 class ToroidalVMSineDistributionTest(unittest.TestCase):
     def setUp(self):
@@ -47,6 +48,9 @@ def test_trigonometric_moment_numerical(self):
             self.tvm.trigonometric_moment_numerical(0), array([1.0, 1.0])
         )
 
+    def test_plot_2d(self):
+        self.tvm.plot()
+
     # jscpd:ignore-start
     # pylint: disable=R0801
     def _unnormalized_pdf(self, xs):