test warn no xyticklabels

Author: mathause

mplotutils/_cartopy_utils.py

@@ -322,10 +322,10 @@ def yticklabels(
 
     if not y_label_points:
         msg = (
-            "WARN: no points found for ylabel\n"
+            "no points found for ylabel. "
             f"y_lim is: {y_lim[0]:0.2f} to {y_lim[1]:0.2f}"
         )
-        warnings.warn(msg)
+        warnings.warn(msg, stacklevel=2)
 
     # get a transform instance that mpl understands
     transform = ccrs.PlateCarree()._as_mpl_transform(ax)
@@ -421,10 +421,10 @@ def xticklabels(
 
     if not x_label_points:
         msg = (
-            "WARN: no points found for xlabel\n"
+            "no points found for xlabel. "
             f"x_lim is: {x_lim[0]:0.2f} to {x_lim[1]:0.2f}"
         )
-        warnings.warn(msg)
+        warnings.warn(msg, stacklevel=2)
 
     # get a transform instance that mpl understands
     transform = ccrs.PlateCarree()._as_mpl_transform(ax)

mplotutils/tests/test_mapticklabels.py

@@ -71,6 +71,19 @@ def test_xticklabels_robinson(pass_ax):
         assert ax.texts[-1].get_text() == "120°E"
 
 
+def test_xyticklabels_not_on_map():
+
+    with subplots_context(subplot_kw=dict(projection=ccrs.PlateCarree())) as (f, ax):
+        # restrict extent
+        ax.set_extent([0, 180, -90, 0], ccrs.PlateCarree())
+
+        with pytest.warns(match="no points found for xlabel"):
+            mpu.xticklabels([180, 270, 360], ax=ax, size=8)
+
+        with pytest.warns(match="no points found for ylabel"):
+            mpu.yticklabels([0, 45, 90], ax=ax, size=8)
+
+
 # TODO: https://github.com/mpytools/mplotutils/issues/48
 # def test_xticklabels_robinson_180():