iotests/migrate-bitmaps-test: delint

Mostly uninteresting stuff. Move the test injections under a function
named main() so that the variables used during that process aren't in
the global scope.

Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Hanna Reitz <hreitz@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20210923180715.4168522-6-jsnow@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

tests/qemu-iotests/tests/migrate-bitmaps-test

@@ -19,10 +19,11 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #
 
-import os
 import itertools
 import operator
+import os
 import re
+
 import iotests
 from iotests import qemu_img, qemu_img_create, Timeout
 
@@ -224,25 +225,6 @@ def inject_test_case(klass, suffix, method, *args, **kwargs):
     setattr(klass, 'test_' + method + suffix, lambda self: mc(self))
 
 
-for cmb in list(itertools.product((True, False), repeat=5)):
-    name = ('_' if cmb[0] else '_not_') + 'persistent_'
-    name += ('_' if cmb[1] else '_not_') + 'migbitmap_'
-    name += '_online' if cmb[2] else '_offline'
-    name += '_shared' if cmb[3] else '_nonshared'
-    if cmb[4]:
-        name += '__pre_shutdown'
-
-    inject_test_case(TestDirtyBitmapMigration, name, 'do_test_migration',
-                     *list(cmb))
-
-for cmb in list(itertools.product((True, False), repeat=2)):
-    name = ('_' if cmb[0] else '_not_') + 'persistent_'
-    name += ('_' if cmb[1] else '_not_') + 'migbitmap'
-
-    inject_test_case(TestDirtyBitmapMigration, name,
-                     'do_test_migration_resume_source', *list(cmb))
-
-
 class TestDirtyBitmapBackingMigration(iotests.QMPTestCase):
     def setUp(self):
         qemu_img_create('-f', iotests.imgfmt, base_a, size)
@@ -304,6 +286,30 @@ class TestDirtyBitmapBackingMigration(iotests.QMPTestCase):
         self.assert_qmp(result, 'return', {})
 
 
+def main() -> None:
+    for cmb in list(itertools.product((True, False), repeat=5)):
+        name = ('_' if cmb[0] else '_not_') + 'persistent_'
+        name += ('_' if cmb[1] else '_not_') + 'migbitmap_'
+        name += '_online' if cmb[2] else '_offline'
+        name += '_shared' if cmb[3] else '_nonshared'
+        if cmb[4]:
+            name += '__pre_shutdown'
+
+        inject_test_case(TestDirtyBitmapMigration, name, 'do_test_migration',
+                         *list(cmb))
+
+    for cmb in list(itertools.product((True, False), repeat=2)):
+        name = ('_' if cmb[0] else '_not_') + 'persistent_'
+        name += ('_' if cmb[1] else '_not_') + 'migbitmap'
+
+        inject_test_case(TestDirtyBitmapMigration, name,
+                         'do_test_migration_resume_source', *list(cmb))
+
+    iotests.main(
+        supported_fmts=['qcow2'],
+        supported_protocols=['file']
+    )
+
+
 if __name__ == '__main__':
-    iotests.main(supported_fmts=['qcow2'],
-                 supported_protocols=['file'])
+    main()