Minor fix for tests

Author: Chilipp

tests/test_plotters.py

@@ -1738,14 +1738,16 @@ def _label_test(self, key, label_func, has_time=None):
 def test_rotated_pole_poly():
     """Test function for https://github.com/psyplot/psy-maps/issues/28"""
     test_file = os.path.join(bt.test_dir, "rotated-pole-test.nc")
-    with psy.plot.mapplot(test_file, plot="poly") as sp:
+    # select rlon and rlat manually to make sure we do not use the coordinates
+    decoder_kws = {"x": "rlon", "y": "rlat"}
+    with psy.plot.mapplot(test_file, plot="poly", decoder=decoder_kws) as sp:
         plotter = sp.plotters[0]
         minx, maxx = plotter.ax.get_xlim()
         miny, maxy = plotter.ax.get_ylim()
-        assert abs(minx - -30.88) < 2
-        assert abs(maxx - 19.95) < 2
-        assert abs(miny - -26.21) < 2
-        assert abs(maxy - 31.88) < 2
+        assert abs(minx - -32.2) < 2
+        assert abs(maxx - 22) < 2
+        assert abs(miny - -27.14) < 2
+        assert abs(maxy - 25.6) < 2
 
 
 def test_plot_poly_3D_bounds():