Add stock_move_auto_assign

Automatically check availability of stock moves when a move is set to "done".

It uses queue jobs to verify the availability in order to have a minimal impact
on the user operations.

The conditions to trigger the check are:

* A move is marked as done
* The destination locations of the move lines are internal
* The move doesn't have successors in a chain of moves

At this point, jobs are generated:

* One job per product
* Any move waiting for stock in a parent (or same) location of the internal
  destination locations from the done move has its availability checked

Only one job is generated for an identical set of (product, locations).

stock_move_auto_assign/tests/test_auto_assign.py

@@ -0,0 +1,129 @@
+# Copyright 2020 Camptocamp SA
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
+
+from odoo.tests import SavepointCase
+
+from odoo.addons.queue_job.job import identity_exact
+from odoo.addons.queue_job.tests.common import mock_with_delay
+
+
+class TestStockMoveAutoAssign(SavepointCase):
+    @classmethod
+    def setUpClass(cls):
+        super().setUpClass()
+        cls.env = cls.env(context=dict(cls.env.context, tracking_disable=True))
+
+        cls.wh = cls.env.ref("stock.warehouse0")
+        cls.out_type = cls.wh.out_type_id
+        cls.in_type = cls.wh.in_type_id
+        cls.int_type = cls.wh.int_type_id
+
+        cls.customer_loc = cls.env.ref("stock.stock_location_customers")
+        cls.supplier_loc = cls.env.ref("stock.stock_location_suppliers")
+        cls.shelf1_loc = cls.env.ref("stock.stock_location_components")
+        cls.shelf2_loc = cls.env.ref("stock.stock_location_14")
+
+        cls.product = cls.env["product.product"].create(
+            {"name": "Product", "type": "product"}
+        )
+
+    def _create_move(
+        self,
+        product,
+        picking_type,
+        qty=1.0,
+        state="confirmed",
+        procure_method="make_to_stock",
+        move_dest=None,
+    ):
+        source = picking_type.default_location_src_id or self.supplier_loc
+        dest = picking_type.default_location_dest_id or self.customer_loc
+        move_vals = {
+            "name": product.name,
+            "product_id": product.id,
+            "product_uom_qty": qty,
+            "product_uom": product.uom_id.id,
+            "picking_type_id": picking_type.id,
+            "location_id": source.id,
+            "location_dest_id": dest.id,
+            "state": state,
+            "procure_method": procure_method,
+        }
+        if move_dest:
+            move_vals["move_dest_ids"] = [(4, move_dest.id, False)]
+        return self.env["stock.move"].create(move_vals)
+
+    def _update_qty_in_location(self, location, product, quantity):
+        self.env["stock.quant"]._update_available_quantity(product, location, quantity)
+
+    def test_job_assign_confirmed_move(self):
+        """Test job method, assign moves matching product and location"""
+        move1 = self._create_move(self.product, self.out_type)
+        move2 = self._create_move(self.product, self.out_type)
+        # put stock in Stock/Shelf 1, the move has a source location in Stock
+        self._update_qty_in_location(self.shelf1_loc, self.product, 100)
+        self.product.moves_auto_assign(self.shelf1_loc)
+        self.assertEqual(move1.state, "assigned")
+        self.assertEqual(move2.state, "assigned")
+
+    def test_move_done_enqueue_job(self):
+        """A move done enqueue a new job to assign other moves"""
+        move = self._create_move(self.product, self.in_type, qty=100)
+        move._action_assign()
+        move.move_line_ids.qty_done = 50
+        move.move_line_ids.location_dest_id = self.shelf1_loc.id
+        move.move_line_ids.copy(
+            default={"qty_done": 50, "location_dest_id": self.shelf2_loc.id}
+        )
+        with mock_with_delay() as (delayable_cls, delayable):
+            move._action_done()
+            # .with_delay() has been called once
+            self.assertEqual(delayable_cls.call_count, 1)
+            delay_args, delay_kwargs = delayable_cls.call_args
+            # .with_delay() is called on self.product
+            self.assertEqual(delay_args, (self.product,))
+            # .with_delay() with the following options
+            self.assertEqual(delay_kwargs.get("identity_key"), identity_exact)
+            # check what's passed to the job method 'moves_auto_assign'
+            self.assertEqual(delayable.moves_auto_assign.call_count, 1)
+            delay_args, delay_kwargs = delayable.moves_auto_assign.call_args
+            self.assertEqual(delay_args, (self.shelf1_loc | self.shelf2_loc,))
+            self.assertDictEqual(delay_kwargs, {})
+
+    def test_move_done_service_no_job(self):
+        """Service products do not enqueue job"""
+        self.product.type = "service"
+        move = self._create_move(self.product, self.in_type, qty=1)
+        move._action_assign()
+        move.move_line_ids.qty_done = 1
+        move.move_line_ids.location_dest_id = self.shelf1_loc.id
+        with mock_with_delay() as (delayable_cls, delayable):
+            move._action_done()
+            # .with_delay() has not been called
+            self.assertEqual(delayable_cls.call_count, 0)
+
+    def test_move_done_chained_no_job(self):
+        """A move chained to another does not enqueue job"""
+        move_out = self._create_move(
+            self.product, self.out_type, qty=1, state="waiting"
+        )
+        move = self._create_move(self.product, self.in_type, qty=1, move_dest=move_out)
+        move._action_assign()
+        move.move_line_ids.qty_done = 1
+        move.move_line_ids.location_dest_id = self.shelf1_loc.id
+        with mock_with_delay() as (delayable_cls, delayable):
+            move._action_done()
+            # .with_delay() has not been called
+            self.assertEqual(delayable_cls.call_count, 0)
+
+    def test_move_done_customer_no_job(self):
+        """A move with other destination than internal does not enqueue job"""
+        move = self._create_move(self.product, self.out_type, qty=1)
+        self._update_qty_in_location(self.shelf1_loc, self.product, 1)
+        move._action_assign()
+        move.move_line_ids.qty_done = 1
+        move.move_line_ids.location_dest_id = self.customer_loc
+        with mock_with_delay() as (delayable_cls, delayable):
+            move._action_done()
+            # .with_delay() has not been called
+            self.assertEqual(delayable_cls.call_count, 0)