[FIX] account_bank_statement_import_transfer_move: Resilient test

Don't depend at all of any external statement import, in data nor in code.

For that, we mock the corresponding methods for getting the expected data.

account_bank_statement_import_transfer_move/tests/test_statement.py

@@ -1,9 +1,8 @@
 # Copyright 2020 Camptocamp SA
+# Copyright 2020 Tecnativa - Pedro M. Baeza
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
-import base64
-import unittest
+from unittest.mock import patch
 
-from odoo.modules.module import get_module_resource
 from odoo.tests.common import SavepointCase
 
 
@@ -36,43 +35,67 @@ class TestGenerateBankStatement(SavepointCase):
             }
         )
 
-    def _load_statement(self):
-        module = self.env["ir.module.module"].search(
+    def _parse_file(self, data_file):
+        """Fake method for returning valuable data. Extracted from CAMT demo"""
+        return (
+            None,
+            "NL77ABNA0574908765",
             [
-                ("name", "=", "account_bank_statement_import_camt_oca"),
-                ("state", "=", "installed"),
-            ]
+                {
+                    "balance_end_real": 15121.12,
+                    "balance_start": 15568.27,
+                    "date": "2014-01-05",
+                    "name": "1234Test/1",
+                    "transactions": [
+                        {
+                            "account_number": "NL46ABNA0499998748",
+                            "amount": -754.25,
+                            "date": "2014-01-05",
+                            "name": "Insurance policy 857239PERIOD 01.01.2014 - "
+                            "31.12.2014",
+                            "note": "MKB Insurance 859239PERIOD 01.01.2014 - "
+                            "31.12.2014",
+                            "partner_name": "INSURANCE COMPANY TESTX",
+                            "ref": "435005714488-ABNO33052620",
+                        },
+                    ],
+                }
+            ],
         )
-        if not (module):
-            raise unittest.SkipTest(
-                "account_bank_statement_import_camt_oca module is not installed"
-            )
 
-        testfile = get_module_resource(
-            "account_bank_statement_import_camt_oca", "test_files", "test-camt053"
-        )
-        with open(testfile, "rb") as datafile:
-            camt_file = base64.b64encode(datafile.read())
+    def _get_bank_statements_available_import_formats(self):
+        """Fake method for returning a fake importer for not having errors."""
+        return ["test"]
 
-            self.env["account.bank.statement.import"].create(
-                {"attachment_ids": [(0, 0, {"name": "test file", "datas": camt_file})]}
-            ).import_file()
-
-            bank_st_record = self.env["account.bank.statement"].search(
-                [("name", "=", "1234Test/1")], limit=1
-            )
-            statement_lines = bank_st_record.line_ids
-
-            return statement_lines
+    def _load_statement(self):
+        module = "odoo.addons.account_bank_statement_import"
+        with patch(
+            module
+            + ".account_journal.AccountJournal"
+            + "._get_bank_statements_available_import_formats",
+            self._get_bank_statements_available_import_formats,
+        ):
+            with patch(
+                module
+                + ".account_bank_statement_import"
+                + ".AccountBankStatementImport._parse_file",
+                self._parse_file,
+            ):
+                self.env["account.bank.statement.import"].create(
+                    {"attachment_ids": [(0, 0, {"name": "test file", "datas": b""})]}
+                ).import_file()
+                bank_st_record = self.env["account.bank.statement"].search(
+                    [("name", "=", "1234Test/1")], limit=1
+                )
+                statement_lines = bank_st_record.line_ids
+                return statement_lines
 
     def test_statement_import(self):
-
         self.journal.transfer_line = True
         lines = self._load_statement()
-        self.assertEqual(len(lines), 5)
+        self.assertEqual(len(lines), 2)
         self.assertAlmostEqual(sum(lines.mapped("amount")), 0)
-
         self.journal.transfer_line = False
         lines = self._load_statement()
-        self.assertEqual(len(lines), 4)
-        self.assertAlmostEqual(sum(lines.mapped("amount")), -12.99)
+        self.assertEqual(len(lines), 1)
+        self.assertAlmostEqual(sum(lines.mapped("amount")), -754.25)