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diff --git a/odoo/addons/test_testing_utilities/tests/test_form_impl.py b/odoo/addons/test_testing_utilities/tests/test_form_impl.py
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+++ b/odoo/addons/test_testing_utilities/tests/test_form_impl.py
@@ -0,0 +1,461 @@
+# -*- coding: utf-8 -*-
+"""
+Test for the pseudo-form implementation (odoo.tests.common.Form), which should
+basically be a server-side implementation of form views (though probably not
+complete) intended for properly validating business "view" flows (onchanges,
+readonly, required, ...) and make it easier to generate sensible & coherent
+business objects.
+"""
+from operator import itemgetter
+
+from odoo.tests.common import TransactionCase, Form
+
+
+class TestBasic(TransactionCase):
+    def test_defaults(self):
+        """
+        Checks that we can load a default form view and perform trivial
+        default_get & onchanges & computations
+        """
+        f = Form(self.env['test_testing_utilities.a'])
+        self.assertEqual(f.id, False, "check that our record is not in db (yet)")
+
+        self.assertEqual(f.f2, 42)
+        self.assertEqual(f.f3, 21)
+        self.assertEqual(f.f4, 42)
+
+        f.f1 = 4
+        self.assertEqual(f.f2, 42)
+        self.assertEqual(f.f3, 21)
+        self.assertEqual(f.f4, 10)
+
+        f.f2 = 8
+        self.assertEqual(f.f3, 4)
+        self.assertEqual(f.f4, 2)
+
+        r = f.save()
+        self.assertEqual(
+            (r.f1, r.f2, r.f3, r.f4),
+            (4, 8, 4, 2),
+        )
+
+    def test_required(self):
+        f = Form(self.env['test_testing_utilities.a'])
+        # f1 no default & no value => should fail
+        with self.assertRaisesRegexp(AssertionError, 'f1 is a required field'):
+            f.save()
+        # set f1 and unset f2 => should work
+        f.f1 = 1
+        f.f2 = False
+        r = f.save()
+        self.assertEqual(
+            (r.f1, r.f2, r.f3, r.f4),
+            (1, 0, 0, 0)
+        )
+
+    def test_readonly(self):
+        """
+        Checks that fields with readonly modifiers (marked as readonly or
+        computed w/o set) raise an error when set.
+        """
+        f = Form(self.env['test_testing_utilities.readonly'])
+
+        with self.assertRaises(AssertionError):
+            f.f1 = 5
+        with self.assertRaises(AssertionError):
+            f.f2 = 42
+
+class TestM2O(TransactionCase):
+    def test_default_and_onchange(self):
+        """ Checks defaults & onchanges impacting m2o fields
+        """
+        Sub = self.env['test_testing_utilities.m2o']
+        a = Sub.create({'name': "A"})
+        b = Sub.create({'name': "B"})
+
+        f = Form(self.env['test_testing_utilities.d'])
+
+        self.assertEqual(
+            f.f, a,
+            "The default value for the m2o should be the first Sub record"
+        )
+        f.f2 = "B"
+        self.assertEqual(
+            f.f, b,
+            "The new m2o value should match the second field by name"
+        )
+
+        f.save()
+
+    def test_set(self):
+        """
+        Checks that we get/set recordsets for m2o & that set correctly
+        triggers onchange
+        """
+        r1 = self.env['test_testing_utilities.m2o'].create({'name': "A"})
+        r2 = self.env['test_testing_utilities.m2o'].create({'name': "B"})
+
+        f = Form(self.env['test_testing_utilities.c'])
+
+        # check that basic manipulations work
+        f.f2 = r1
+        self.assertEqual(f.f2, r1)
+        self.assertEqual(f.name, 'A')
+        f.f2 = r2
+        self.assertEqual(f.name, 'B')
+
+        # can't set an int to an m2o field
+        with self.assertRaises(AssertionError):
+            f.f2 = r1.id
+        self.assertEqual(f.f2, r2)
+        self.assertEqual(f.name, 'B')
+
+        # can't set a record of the wrong model
+        temp = self.env['test_testing_utilities.readonly'].create({})
+        with self.assertRaises(AssertionError):
+            f.f2 = temp
+        self.assertEqual(f.f2, r2)
+        self.assertEqual(f.name, 'B')
+
+        r = f.save()
+        self.assertEqual(r.f2, r2)
+
+class TestM2M(TransactionCase):
+    def test_add(self):
+        Sub = self.env['test_testing_utilities.sub2']
+        f = Form(self.env['test_testing_utilities.e'])
+
+        r1 = Sub.create({'name': "Item"})
+        r2 = Sub.create({'name': "Item2"})
+
+        f.m2m.add(r1)
+        f.m2m.add(r2)
+
+        r = f.save()
+
+        self.assertEqual(
+            r.m2m,
+            r1 | r2
+        )
+
+    def test_remove_by_index(self):
+        Sub = self.env['test_testing_utilities.sub2']
+        f = Form(self.env['test_testing_utilities.e'])
+
+        r1 = Sub.create({'name': "Item"})
+        r2 = Sub.create({'name': "Item2"})
+
+        f.m2m.add(r1)
+        f.m2m.add(r2)
+        f.m2m.remove(index=0)
+
+        r = f.save()
+
+        self.assertEqual(
+            r.m2m,
+            r2
+        )
+
+    def test_remove_by_id(self):
+        Sub = self.env['test_testing_utilities.sub2']
+        f = Form(self.env['test_testing_utilities.e'])
+
+        r1 = Sub.create({'name': "Item"})
+        r2 = Sub.create({'name': "Item2"})
+
+        f.m2m.add(r1)
+        f.m2m.add(r2)
+        f.m2m.remove(id=r1.id)
+
+        r = f.save()
+
+        self.assertEqual(
+            r.m2m,
+            r2
+        )
+
+    def test_on_m2m_change(self):
+        Sub = self.env['test_testing_utilities.sub2']
+        f = Form(self.env['test_testing_utilities.e'])
+
+        self.assertEqual(f.count, 0)
+        f.m2m.add(Sub.create({'name': 'a'}))
+        self.assertEqual(f.count, 1)
+        f.m2m.add(Sub.create({'name': 'a'}))
+        f.m2m.add(Sub.create({'name': 'a'}))
+        f.m2m.add(Sub.create({'name': 'a'}))
+        self.assertEqual(f.count, 4)
+        f.m2m.remove(index=0)
+        f.m2m.remove(index=0)
+        f.m2m.remove(index=0)
+        self.assertEqual(f.count, 1)
+
+    def test_m2m_changed(self):
+        Sub = self.env['test_testing_utilities.sub2']
+        a = Sub.create({'name': 'a'})
+        b = Sub.create({'name': 'b'})
+        c = Sub.create({'name': 'c'})
+        d = Sub.create({'name': 'd'})
+
+        f = Form(self.env['test_testing_utilities.f'])
+        # check default_get
+        self.assertEqual(f.m2m[:], a | b)
+
+        f.m2o = c
+        self.assertEqual(f.m2m[:], a | b | c)
+
+        f.m2o = d
+        self.assertEqual(f.m2m[:], a | b | c | d)
+
+    def test_m2m_readonly(self):
+        Sub = self.env['test_testing_utilities.sub3']
+        a = Sub.create({'name': 'a'})
+        b = Sub.create({'name': 'b'})
+        r = self.env['test_testing_utilities.g'].create({
+            'm2m': [(6, 0, a.ids)]
+        })
+
+        f = Form(r)
+
+        with self.assertRaises(AssertionError):
+            f.m2m.add(b)
+        with self.assertRaises(AssertionError):
+            f.m2m.remove(id=a.id)
+
+        f.save()
+        self.assertEqual(r.m2m, a)
+
+
+get = itemgetter('name', 'value', 'v')
+class TestO2M(TransactionCase):
+    def test_basic_alterations(self):
+        """ Tests that the o2m proxy allows adding, removing and editing o2m
+        records
+        """
+        f = Form(self.env['test_testing_utilities.parent'], view='test_testing_utilities.o2m_parent')
+
+        f.subs.new().save()
+        f.subs.new().save()
+        f.subs.new().save()
+        f.subs.remove(index=0)
+
+        r = f.save()
+
+        self.assertEqual(
+            [get(s) for s in r.subs],
+            [("2", 2, 2), ("2", 2, 2)]
+        )
+
+        with Form(r, view='test_testing_utilities.o2m_parent') as f:
+            with f.subs.new() as sub:
+                sub.value = 5
+            f.subs.new().save()
+
+            with f.subs.edit(index=2) as sub:
+                self.assertEqual(sub.v, 5)
+
+            f.subs.remove(index=0)
+
+        self.assertEqual(
+            [get(s) for s in r.subs],
+            [("2", 2, 2), ("5", 5, 5), ("2", 2, 2)]
+        )
+
+        with Form(r, view='test_testing_utilities.o2m_parent') as f, \
+            f.subs.edit(index=0) as sub,\
+            self.assertRaises(AssertionError):
+                sub.name = "whop whop"
+
+    def test_o2m_editable_list(self):
+        """ Tests the o2m proxy when the list view is editable rather than
+        delegating to a separate form view
+        """
+        f = Form(self.env['test_testing_utilities.parent'], view='test_testing_utilities.o2m_parent_ed')
+
+        with f.subs.new() as s:
+            s.value = 1
+        with f.subs.new() as s:
+            s.value = 3
+        with f.subs.new() as s:
+            s.value = 7
+
+        r = f.save()
+
+        self.assertEqual(r.v, 12)
+        self.assertEqual(
+            [get(s) for s in r.subs],
+            [('1', 1, 1), ('3', 3, 3), ('7', 7, 7)]
+        )
+
+    def test_o2m_inline(self):
+        """ Tests the o2m proxy when the list and form views are provided
+        inline rather than fetched separately
+        """
+        f = Form(self.env['test_testing_utilities.parent'], view='test_testing_utilities.o2m_parent_inline')
+
+        with f.subs.new() as s:
+            s.value = 42
+
+        r = f.save()
+
+        self.assertEqual(
+            [get(s) for s in r.subs],
+            [("0", 42, 0)],
+            "should not have set v (and thus not name)"
+        )
+
+    def test_o2m_default(self):
+        """ Tests that default_get can return defaults for the o2m
+        """
+        f = Form(self.env['test_testing_utilities.default'])
+
+        with f.subs.edit(index=0) as s:
+            self.assertEqual(s.v, 5)
+            self.assertEqual(s.value, False)
+
+        r = f.save()
+
+        self.assertEqual(
+            [get(s) for s in r.subs],
+            [("5", 2, 5)]
+        )
+
+    def test_o2m_inner_default(self):
+        """ Tests that creating an o2m record will get defaults for it
+        """
+        f = Form(self.env['test_testing_utilities.default'])
+
+        with f.subs.new() as s:
+            self.assertEqual(s.value, 2)
+            self.assertEqual(s.v, 2, "should have onchanged value to v")
+
+    def test_o2m_onchange_parent(self):
+        """ Tests that changing o2m content triggers onchange in the parent
+        """
+        f = Form(self.env['test_testing_utilities.parent'])
+
+        self.assertEqual(f.value, 1, "value should have its default")
+        self.assertEqual(f.v, 1, "v should be equal to value")
+
+        f.subs.new().save()
+
+        self.assertEqual(f.v, 3, "should be sum of value & children v")
+
+    def test_o2m_onchange_inner(self):
+        """ Tests that editing a field of an o2m record triggers onchange
+        in the o2m record and its parent
+        """
+        f = Form(self.env['test_testing_utilities.parent'])
+
+        # only apply the onchange on edition end (?)
+        with f.subs.new() as sub:
+            sub.value = 6
+            self.assertEqual(sub.v, 6)
+            self.assertEqual(f.v, 1)
+        self.assertEqual(f.v, 7)
+
+    def test_o2m_parent_content(self):
+        """ Tests that when editing a field of an o2m the data sent contains
+        the parent data
+        """
+        f = Form(self.env['test_testing_utilities.parent'])
+
+        # only apply the onchange on edition end (?)
+        with f.subs.new() as sub:
+            sub.has_parent = True
+            self.assertEqual(sub.has_parent, True)
+            self.assertEqual(sub.value, 1)
+            self.assertEqual(sub.v, 1)
+
+    def test_m2o_readonly(self):
+        r = self.env['test_testing_utilities.parent'].create({
+            'subs': [(0, 0, {})]
+        })
+        f = Form(r, view='test_testing_utilities.o2m_parent_readonly')
+
+        with self.assertRaises(AssertionError):
+            f.subs.new()
+        with self.assertRaises(AssertionError):
+            f.subs.edit(index=0)
+        with self.assertRaises(AssertionError):
+            f.subs.remove(index=0)
+
+class TestEdition(TransactionCase):
+    """ These use the context manager form as we don't need the record
+    post-save (we already have it) and it's easier to see what bits act on
+    the form (inside `with`) versus outside. That let me catch a few
+    mistakes.
+    """
+    def test_trivial(self):
+        r = self.env['test_testing_utilities.a'].create({
+            'f1': 5,
+        })
+
+        with Form(r) as f:
+            self.assertEqual(f.id, r.id)
+            self.assertEqual(f.f1, 5)
+            self.assertEqual(f.f4, 8)
+
+            f.f2 = 5
+            self.assertEqual(f.f3, 2)
+            self.assertEqual(f.f4, 1)
+
+        self.assertEqual(r.f2, 5)
+        self.assertEqual(r.f3, 2)
+
+    def test_m2o(self):
+        Sub = self.env['test_testing_utilities.m2o']
+        a = Sub.create({'name': 'a'})
+        b = Sub.create({'name': 'b'})
+        c = Sub.create({'name': 'c'})
+
+        r = self.env['test_testing_utilities.d'].create({
+            'f': c.id,
+            'f2': "OK",
+        })
+
+        with Form(r) as f:
+            # no default/onchange should have run so loading an incoherent
+            # record should still be incoherent
+            self.assertEqual(f.f, c)
+            self.assertEqual(f.f2, 'OK')
+
+            f.f2 = "b"
+            self.assertEqual(f.f, b)
+            f.f2 = "Whoops"
+            self.assertEqual(f.f, Sub)
+            f.f2 = "a"
+            self.assertEqual(f.f, a)
+
+        self.assertEqual(r.f2, "a")
+        self.assertEqual(r.f, a)
+
+    def test_m2m_empty(self):
+        sub = self.env['test_testing_utilities.sub2'].create({'name': 'a'})
+
+        r = self.env['test_testing_utilities.f'].create({
+            'm2m': []
+        })
+
+        with Form(r) as f:
+            f.m2o = sub
+
+        self.assertEqual(r.m2o, sub)
+        self.assertEqual(r.m2m, sub)
+
+    def test_m2m_nonempty(self):
+        Sub = self.env['test_testing_utilities.sub2']
+        a = Sub.create({'name': 'a'})
+        b = Sub.create({'name': 'b'})
+        c = Sub.create({'name': 'c'})
+
+        r = self.env['test_testing_utilities.f'].create({
+            'm2m': [(6, 0, (a | b | c).ids)]
+        })
+
+        with Form(r) as f:
+            self.assertEqual(f.m2m[:], (a | b | c))
+            f.m2m.remove(index=0)
+            self.assertEqual(f.m2m[:], (b | c))
+
+        self.assertEqual(r.m2m, (b | c))