[FIX] test_performance: adapt new test to new api

odoo/addons/test_performance/tests/test_performance.py

@@ -75,20 +75,26 @@ class TestPerformance(TransactionCase):
                 'tag_ids': [(0, 0, {'name': val}) for val in range(10)],
             })
 
-
-    @queryCount(admin=5, demo=5)
+    @users('admin', 'demo')
+    @warmup
     def test_several_prefetch(self):
         initial_records = self.env['test_performance.base'].search([])
         self.assertEqual(len(initial_records), 5)
-        for i in range(8):
-            self.env.cr.execute('insert into test_performance_base(value) select value from test_performance_base')
+        for _i in range(8):
+            self.env.cr.execute(
+                'insert into test_performance_base(value) select value from test_performance_base'
+            )
         records = self.env['test_performance.base'].search([])
         self.assertEqual(len(records), 1280)
-        self.resetQueryCount()
         # should only cause 2 queries thanks to prefetching
-        records.mapped('value')
-        records.invalidate_cache(['value'])
-        # should only cause 2 queries thanks to prefetching
-        with self.env.do_in_onchange():
+        with self.assertQueryCount(admin=2, demo=2):
             records.mapped('value')
-        self.env.cr.execute('delete from test_performance_base where id not in %s', (tuple(initial_records.ids),))
+        records.invalidate_cache(['value'])
+
+        with self.assertQueryCount(admin=2, demo=2):
+            with self.env.do_in_onchange():
+                records.mapped('value')
+        self.env.cr.execute(
+            'delete from test_performance_base where id not in %s',
+            (tuple(initial_records.ids),)
+        )