[1.7.x] Fixed table cleanup in GIS migration tests

Backport of ab90c4707b from master.

django/contrib/gis/tests/gis_migrations/test_operations.py

@@ -6,6 +6,7 @@ from django.contrib.gis.tests.utils import HAS_SPATIAL_DB
 from django.db import connection, migrations, models
 from django.db.migrations.migration import Migration
 from django.db.migrations.state import ProjectState
+from django.db.utils import DatabaseError
 from django.test import TransactionTestCase
 
 if HAS_SPATIAL_DB:
@@ -21,6 +22,19 @@ if HAS_SPATIAL_DB:
 class OperationTests(TransactionTestCase):
     available_apps = ["django.contrib.gis.tests.gis_migrations"]
 
+    def tearDown(self):
+        # Delete table after testing
+        with connection.cursor() as cursor:
+            try:
+                cursor.execute("DROP TABLE %s" % connection.ops.quote_name("gis_neighborhood"))
+            except DatabaseError:
+                pass
+            else:
+                if HAS_GEOMETRY_COLUMNS:
+                    cursor.execute("DELETE FROM geometry_columns WHERE %s = %%s" % (
+                        GeometryColumns.table_name_col(),), ["gis_neighborhood"])
+        super(OperationTests, self).tearDown()
+
     def get_table_description(self, table):
         with connection.cursor() as cursor:
             return connection.introspection.get_table_description(cursor, table)
@@ -38,17 +52,6 @@ class OperationTests(TransactionTestCase):
             return migration.apply(project_state, editor)
 
     def set_up_test_model(self):
-        # Delete the tables if they already exist
-        with connection.cursor() as cursor:
-            try:
-                cursor.execute("DROP TABLE %s" % connection.ops.quote_name("gis_neighborhood"))
-            except:
-                pass
-            else:
-                if HAS_GEOMETRY_COLUMNS:
-                    cursor.execute("DELETE FROM geometry_columns WHERE %s = %%s" % (
-                        GeometryColumns.table_name_col(),), ["gis_neighborhood"])
-
         operations = [migrations.CreateModel(
             "Neighborhood",
             [

tests/migrations/test_operations.py

@@ -5,7 +5,7 @@ from django.db.migrations.migration import Migration
 from django.db.migrations.state import ProjectState
 from django.db.models.fields import NOT_PROVIDED
 from django.db.transaction import atomic
-from django.db.utils import IntegrityError
+from django.db.utils import IntegrityError, DatabaseError
 
 from .test_base import MigrationTestBase
 
@@ -37,11 +37,11 @@ class OperationTests(MigrationTestBase):
         with connection.cursor() as cursor:
             try:
                 cursor.execute("DROP TABLE %s_pony" % app_label)
-            except:
+            except DatabaseError:
                 pass
             try:
                 cursor.execute("DROP TABLE %s_stable" % app_label)
-            except:
+            except DatabaseError:
                 pass
         # Make the "current" state
         operations = [migrations.CreateModel(