Added tests for plotting functions.

tests/test_geoarray.py

@@ -35,6 +35,7 @@ import unittest
 from unittest import TestLoader
 import matplotlib
 from typing import Iterable
+from importlib import util
 
 # Imports regarding the created python module.
 from py_tools_ds.geo.vector import geometry
@@ -510,8 +511,10 @@ class Test_GeoarrayFunctions(unittest.TestCase):
         # TODO: https://github.com/ketch/griddle/blob/master/tests/plot_tests.py
         self.testtiff.show()
         # self.testtiff.show(interactive=True) # only works if test is started with ipython.
-        # self.testtiff.show_map()
-        # self.testtiff.show_map_utm() # Function still under construction.
+
+        if util.find_spec('mpl_toolkits.basemap'):
+            self.testtiff.show_map()
+            self.testtiff.show_map_utm()  # Function still under construction.
         self.testtiff.show_histogram()
 
         # ----> TODO: Write tests for the remaining functions!