[COV] l10n_it_sdi_channel: Test State tracking

l10n_it_sdi_channel/tests/__init__.py

@@ -1,3 +1,4 @@
 #  License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).
 
 from . import test_account_invoice
+from . import test_fatturapa_attachment_out

l10n_it_sdi_channel/tests/test_fatturapa_attachment_out.py

@@ -0,0 +1,37 @@
+#  Copyright 2023 Simone Rubino - TAKOBI
+#  License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).
+
+from odoo.addons.l10n_it_sdi_channel.models.fatturapa_attachment_out import (
+    STATE_SUBTYPE_MAPPING,
+)
+from odoo.addons.mail.tests.common import MailCommon
+
+
+class TestFatturaPAAttachmentOut(MailCommon):
+    @classmethod
+    def setUpClass(cls):
+        super().setUpClass()
+        cls.attachment_model = cls.env["fatturapa.attachment.out"]
+
+    def test_track_subtype(self):
+        """When the State of the Attachment is updated, a Message is sent."""
+        # Arrange
+        attachment = self.attachment_model.create(
+            {
+                "name": "Test Attachment",
+            }
+        )
+        self.flush_tracking()
+        creation_message = attachment.message_ids
+        self.assertEqual(len(creation_message), 1)
+
+        # Act
+        new_state = "sent"
+        attachment.state = new_state
+        self.flush_tracking()
+
+        # Assert
+        state_update_message = attachment.message_ids - creation_message
+        self.assertEqual(len(state_update_message), 1)
+        subtype_xmlid = STATE_SUBTYPE_MAPPING.get(new_state)
+        self.assertEqual(state_update_message.subtype_id, self.env.ref(subtype_xmlid))