Replaced DatabaseFeatures.supports_left_right_lookups with skipUnlessGISLookup.

django/contrib/gis/db/backends/base/features.py

@@ -35,9 +35,6 @@ class BaseSpatialFeatures:
     # Is the database able to count vertices on polygons (with `num_points`)?
     supports_num_points_poly = True
 
-    # The following properties indicate if the database backend support
-    # certain lookups (dwithin, left and right, relate, ...)
-    supports_left_right_lookups = False
     # Does the backend support expressions for specifying distance in the
     # dwithin lookup?
     supports_dwithin_distance_expr = True

django/contrib/gis/db/backends/postgis/features.py

@@ -8,6 +8,5 @@ class DatabaseFeatures(BaseSpatialFeatures, Psycopg2DatabaseFeatures):
     supports_geography = True
     supports_3d_storage = True
     supports_3d_functions = True
-    supports_left_right_lookups = True
     supports_raster = True
     supports_empty_geometries = True

tests/gis_tests/geoapp/tests.py

@@ -308,7 +308,7 @@ class GeoLookupTest(TestCase):
         self.assertEqual(qs.filter(poly__isvalid=False).count(), 1)
         self.assertEqual(qs.filter(poly__isvalid=True).count(), qs.count() - 1)
 
-    @skipUnlessDBFeature("supports_left_right_lookups")
+    @skipUnlessGISLookup('left', 'right')
     def test_left_right_lookups(self):
         "Testing the 'left' and 'right' lookup types."
         # Left: A << B => true if xmax(A) < xmin(B)