[IMP] account_ebics - Add unit tests

Add 97 tests:

- account_ebics: order numbers, camt and CFONB split per account,
  journal lookup, duplicate statements, download and upload wizards,
  key initialisation (INI/HIA/HPB), passphrase change, admin orders.
- account_ebics_batch: scheduled import, import log, reprocess.
- account_ebics_payment_order / account_ebics_batch_payment: upload of
  the payment file and link to the payment document.
- account_ebics_statement_import_test (new, test-only, not to install
  in production): installs the OCA camt and CFONB parsers in CI and
  runs the end-to-end statement import.

The bank is simulated by patching ebics.xfer._setup_client, or the
fintech client classes for the key initialisation; keys, certificates
and the INI letter are real, created in a temporary directory.

account_ebics_payment_order/tests/__init__.py

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

account_ebics_payment_order/tests/test_payment_order_upload.py

@@ -0,0 +1,95 @@
+# Copyright 2026 Noviat.
+# License LGPL-3 or later (https://www.gnu.org/licenses/lgpl).
+
+import base64
+
+from odoo.exceptions import UserError
+from odoo.tests import tagged
+
+from odoo.addons.account_ebics.tests.common import EbicsTestCommon, FakeEbicsClient
+
+
+@tagged("post_install", "-at_install")
+class TestPaymentOrderUpload(EbicsTestCommon):
+    @classmethod
+    def setUpClass(cls):
+        super().setUpClass()
+        cls.env.user.groups_id |= cls.env.ref(
+            "account_payment_order.group_account_payment"
+        )
+        cls.journal = cls._create_bank_journal("TPO", "FR7630004000031234567890143")
+        cls.ff_cct = cls.env.ref("account_ebics.ebics_ff_CCT")
+        cls.mode = cls.env["account.payment.mode"].create(
+            {
+                "name": "EBICS credit transfer",
+                "company_id": cls.company.id,
+                "bank_account_link": "fixed",
+                "fixed_journal_id": cls.journal.id,
+                "payment_method_id": cls.env.ref(
+                    "account.account_payment_method_manual_out"
+                ).id,
+                "ebics_format_id": cls.ff_cct.id,
+            }
+        )
+
+    def _order(self, state="generated", with_file=True):
+        order = self.env["account.payment.order"].create(
+            {
+                "payment_type": "outbound",
+                "payment_mode_id": self.mode.id,
+                "journal_id": self.journal.id,
+            }
+        )
+        order.state = state
+        if with_file:
+            self._attach(order, "pain001.xml")
+        return order
+
+    def _attach(self, order, name):
+        return self.env["ir.attachment"].create(
+            {
+                "name": name,
+                "res_model": order._name,
+                "res_id": order.id,
+                "datas": base64.b64encode(b"<Document>pain.001</Document>"),
+            }
+        )
+
+    def test_hide_ebics_upload(self):
+        self.assertTrue(self._order(state="draft").hide_ebics_upload)
+        self.assertFalse(self._order().hide_ebics_upload)
+        self.ebics_config.journal_ids = False
+        self.assertTrue(self._order().hide_ebics_upload)
+
+    def test_upload_requires_format_on_mode(self):
+        self.mode.ebics_format_id = False
+        with self.assertRaisesRegex(UserError, "EBICS File Format"):
+            self._order().ebics_upload()
+
+    def test_upload_requires_one_file(self):
+        with self.assertRaisesRegex(UserError, "doesn't contain attachments"):
+            self._order(with_file=False).ebics_upload()
+        order = self._order()
+        self._attach(order, "pain001_old.xml")
+        with self.assertRaisesRegex(UserError, "multiple attachments"):
+            order.ebics_upload()
+
+    def test_upload(self):
+        order = self._order()
+        # the form button passes the active model, as the web client does
+        action = order.with_context(
+            active_model=order._name, active_id=order.id
+        ).ebics_upload()
+        wizard = self.env["ebics.xfer"].browse(action["res_id"])
+        self.assertEqual(wizard.ebics_config_id, self.ebics_config)
+        self.assertEqual(wizard.ebics_userid_id, self.ebics_userid)
+        self.assertEqual(wizard.format_id, self.ff_cct)
+        self.assertEqual(wizard.upload_fname, "pain001.xml")
+        with self._fake_client(FakeEbicsClient(order_id="N077")) as client:
+            wizard.with_context(**action["context"]).ebics_upload()
+        self.assertEqual(client.uploads[0][1], b"<Document>pain.001</Document>")
+        self.assertEqual(order.state, "uploaded")
+        self.assertEqual(order.ebics_order_number, "N077")
+        self.assertEqual(order.ebics_file_id.pain_state, "uploaded")
+        self.assertIn(f"Payment Order: {order.name}", order.ebics_file_id.note)
+        self.assertTrue(any("N077" in msg.body for msg in order.message_ids))