[IMP]hs_code_link: add tests to cover new changes

hs_code_link/tests/test_hs_code_link.py

@@ -0,0 +1,62 @@
+# Copyright 2023 ForgeFlow S.L. (https://www.forgeflow.com)
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl.html).
+from odoo.tests.common import SavepointCase
+
+
+class TestHSCodeLink(SavepointCase):
+    @classmethod
+    def setUpClass(cls):
+        super().setUpClass()
+        # Models
+        cls.company_model = cls.env["res.company"]
+        cls.hs_code_model = cls.env["hs.code"]
+        cls.product_template_model = cls.env["product.template"]
+        cls.property_model = cls.env["ir.property"]
+
+        # Instances
+        cls.company_1 = cls._create_company("Company 1")
+        cls.company_2 = cls._create_company("Company 2")
+
+        cls.hs_code_1 = cls._create_hs_code()
+        cls.hs_code_2 = cls._create_hs_code("12345678910")
+
+        cls.product_template = cls._create_product_template("Product Template 1")
+
+    @classmethod
+    def _create_company(cls, name):
+        return cls.company_model.create({"name": name})
+
+    @classmethod
+    def _create_hs_code(cls, local_code="123456789", description=False):
+        return cls.hs_code_model.create(
+            {"local_code": local_code, "description": description}
+        )
+
+    @classmethod
+    def _create_product_template(cls, name):
+        return cls.product_template_model.create({"name": name})
+
+    def test_01_check_correctly_sync_values_in_different_companies(self):
+        """
+        Check that the values are correctly synced in different companies.
+        """
+        # First Company
+        template_company_1 = self.product_template.with_context(
+            force_company=self.company_1.id
+        )
+        template_company_1.hs_code_id = self.hs_code_1
+        self.assertEqual(
+            template_company_1.hs_code,
+            self.hs_code_1.hs_code,
+            "The H.S. Codes should be the same.",
+        )
+        # Second Company
+        template_company_2 = self.product_template.with_context(
+            force_company=self.company_2.id
+        )
+        template_company_2.hs_code_id = self.hs_code_2
+        self.assertEqual(
+            template_company_2.hs_code,
+            self.hs_code_2.hs_code,
+            "The H.S. Codes should be the same.",
+        )