Adds test for room.plot method

pyproject.toml

@@ -1,3 +1,8 @@
 [build-system]
 # Minimum requirements for the build system to execute.
 requires = ["setuptools", "wheel", "numpy>=1.13.0", "Cython", "pybind11>=2.2"]  # PEP 508 specifications.
+
+[tool.pytest.ini_options]
+filterwarnings = [
+  'ignore:Matplotlib is currently using agg, which is a non-GUI backend, so cannot show the figure.:UserWarning'
+]

pyroomacoustics/tests/test_room_plot.py

@@ -0,0 +1,18 @@
+import pyroomacoustics as pra
+import matplotlib
+
+matplotlib.use("Agg")
+
+
+def test_room_2d():
+    room = pra.ShoeBox([3, 4], max_order=2)
+    room.add_source([1.4, 2.2])
+    room.add_microphone([2.3, 3.5])
+    room.plot()
+
+
+def test_room_3d():
+    room = pra.ShoeBox([3, 4, 5], max_order=2)
+    room.add_source([1.4, 2.2, 4.3])
+    room.add_microphone([2.3, 3.5, 2.7])
+    room.plot()