Close figures in tests (#262)

Author: stefmolin

tests/plotting/test_style.py

@@ -15,6 +15,7 @@ def save_plot(filepath):
     fig, ax = plt.subplots()
     ax.plot([0, 1])
     fig.savefig(filepath)
+    plt.close()
 
 
 @pytest.mark.parametrize('as_decorator', [False, True])

tests/shapes/test_factory.py

@@ -1,5 +1,6 @@
 """Test the factory module."""
 
+import matplotlib.pyplot as plt
 import pytest
 
 
@@ -41,3 +42,4 @@ def test_plot_available_shapes(self, shape_factory, monkeypatch, subset):
         assert {ax.get_title() for ax in populated_axs} == set(
             shape_factory.AVAILABLE_SHAPES
         )
+        plt.close()