[FIX] mrp: test_oee works during the weekend

It happens due to workcenter working hours,
the workcenter is not active during the weekend thus
the productivity loss are not counted in the oee.

This commit removes 2 days to the test date if it is
during the weekend.

addons/mrp/tests/test_oee.py

@@ -1,7 +1,7 @@
 # -*- coding: utf-8 -*-
 # Part of Odoo. See LICENSE file for full copyright and licensing details.
 
-import datetime
+from datetime import datetime, timedelta
 
 from odoo.addons.mrp.tests.common import TestMrpCommon
 
@@ -18,7 +18,10 @@ class TestOee(TestMrpCommon):
 
     def test_wrokcenter_oee(self):
         """  Test case workcenter oee. """
-        day = datetime.date.today()
+        day = datetime.date(datetime.today())
+        # Make the test work the weekend. It will fails due to workcenter working hours.
+        if day.weekday() in (5, 6):
+            day -= timedelta(days=2)
 
         # Productive time duration (13 min)
         self.create_productivity_line(self.env.ref('mrp.block_reason7'), str(day) + " " + "10:43:22", str(day) + " " + "10:56:22")