Added tests for GeometryField.deconstruct().

tests/gis_tests/test_fields.py

@@ -1,5 +1,6 @@
 import copy
 
+from django.contrib.gis.db.models.fields import GeometryField
 from django.contrib.gis.db.models.sql import AreaField, DistanceField
 from django.test import SimpleTestCase
 
@@ -13,3 +14,23 @@ class FieldsTests(SimpleTestCase):
     def test_distance_field_deepcopy(self):
         field = DistanceField(None)
         self.assertEqual(copy.deepcopy(field), field)
+
+
+class GeometryFieldTests(SimpleTestCase):
+    def test_deconstruct_empty(self):
+        field = GeometryField()
+        *_, kwargs = field.deconstruct()
+        self.assertEqual(kwargs, {'srid': 4326})
+
+    def test_deconstruct_values(self):
+        field = GeometryField(
+            srid=4067,
+            dim=3,
+            geography=True,
+        )
+        *_, kwargs = field.deconstruct()
+        self.assertEqual(kwargs, {
+            'srid': 4067,
+            'dim': 3,
+            'geography': True,
+        })