[ADD] product_main_seller: Restore OCA addon from original version

- Restored product_main_seller addon to fix dependency chain
- Addon required by product_origin_char and website_sale_aplicoop

[IMP] website_sale_aplicoop: Add demo data configuration to manifest

- Updated __manifest__.py to include demo data files
- Demo data includes partners, suppliers, products, group orders, and sale orders
- Demo data successfully loads during module installation

product_main_seller/tests/__init__.py

@@ -0,0 +1 @@
+from . import test_seller

product_main_seller/tests/test_seller.py

@@ -0,0 +1,72 @@
+# Copyright (C) 2022 - Today: GRAP (http://www.grap.coop)
+# @author: Quentin DUPONT (quentin.dupont@grap.coop)
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
+
+from odoo import Command
+from odoo.tests.common import TransactionCase
+
+
+class TestSeller(TransactionCase):
+    @classmethod
+    def setUpClass(cls):
+        super().setUpClass()
+        cls.product_workplace = cls.env.ref("product.product_product_24")
+        cls.product_acoustic = cls.env.ref("product.product_product_25")
+        cls.product_with_var_chair = cls.env.ref("product.product_product_11")
+        cls.product_without_seller_desk = cls.env.ref("product.product_product_3")
+
+        cls.partner_woodcorner = cls.env.ref("base.res_partner_1")
+        cls.partner_azure = cls.env.ref("base.res_partner_12")
+
+    def test_01_computed_main_vendor(self):
+        self.assertEqual(
+            self.product_acoustic.main_seller_id,
+            self.product_acoustic.seller_ids[0].partner_id,
+        )
+        self.assertEqual(
+            self.product_with_var_chair.main_seller_id,
+            self.product_acoustic.product_variant_ids[0]
+            .variant_seller_ids[0]
+            .partner_id,
+        )
+
+    def test_02_replace_supplierinfo(self):
+        self.product_acoustic.seller_ids = [
+            Command.clear(),
+            Command.create({"partner_id": self.partner_azure.id}),
+        ]
+        self.assertEqual(self.product_acoustic.main_seller_id.id, self.partner_azure.id)
+
+    def test_03_add_supplierinfo_no_existing_supplierinfo(self):
+        self.product_without_seller_desk.seller_ids = [
+            Command.create({"partner_id": self.partner_azure.id}),
+        ]
+        self.assertEqual(
+            self.product_without_seller_desk.main_seller_id.id, self.partner_azure.id
+        )
+
+    def test_03_add_supplierinfo_low_sequence(self):
+        self.product_workplace.seller_ids.write({"sequence": 1})
+        self.product_workplace.seller_ids = [
+            Command.create({"sequence": 100, "partner_id": self.partner_azure.id}),
+        ]
+        self.assertNotEqual(
+            self.product_workplace.main_seller_id.id, self.partner_azure.id
+        )
+
+    def test_03_add_supplierinfo_high_sequence(self):
+        self.product_workplace.seller_ids.write({"sequence": 1000})
+        self.product_workplace.seller_ids = [
+            Command.create({"sequence": 100, "partner_id": self.partner_azure.id}),
+        ]
+        self.assertEqual(
+            self.product_workplace.main_seller_id.id, self.partner_azure.id
+        )
+
+    def test_04_update_supplierinfo(self):
+        self.product_acoustic.seller_ids.write({"partner_id": self.partner_azure.id})
+        self.assertEqual(self.product_acoustic.main_seller_id.id, self.partner_azure.id)
+
+    def test_05_unlink_supplierinfo(self):
+        self.product_acoustic.seller_ids.unlink()
+        self.assertEqual(self.product_acoustic.main_seller_id.id, False)