feat(fusion_accounting_reports): drill_down_resolver service

Pure-Python helper that, given an account_id and a date range, fetches
posted account.move.line records and returns a flat list of dicts ready
for the drill-down OWL dialog. Used by the engine's drill_down() method.

3 new tests, 35 total passing.

Made-with: Cursor

fusion_accounting_reports/tests/__init__.py

@@ -2,3 +2,4 @@ from . import test_services_unit
 from . import test_currency_conversion
 from . import test_fusion_report
 from . import test_line_resolver
+from . import test_drill_down_resolver

fusion_accounting_reports/tests/test_drill_down_resolver.py

@@ -0,0 +1,60 @@
+"""Tests for drill_down_resolver."""
+
+from datetime import date, timedelta
+
+from odoo.tests.common import TransactionCase, tagged
+from odoo.addons.fusion_accounting_reports.services.drill_down_resolver import (
+    fetch_drill_down,
+)
+
+
+@tagged('post_install', '-at_install')
+class TestDrillDownResolver(TransactionCase):
+
+    def test_returns_empty_for_account_with_no_lines(self):
+        account = self.env['account.account'].search([
+            ('company_ids', 'in', self.env.company.id),
+        ], limit=1)
+        if not account:
+            self.skipTest("No accounts in DB")
+        rows = fetch_drill_down(
+            self.env,
+            account_id=account.id,
+            date_from=date(2099, 1, 1),
+            date_to=date(2099, 12, 31),
+            company_id=self.env.company.id,
+        )
+        self.assertEqual(rows, [])
+
+    def test_returns_lines_for_account_with_data(self):
+        line = self.env['account.move.line'].search([
+            ('parent_state', '=', 'posted'),
+        ], limit=1)
+        if not line:
+            self.skipTest("No posted move lines in DB")
+        rows = fetch_drill_down(
+            self.env,
+            account_id=line.account_id.id,
+            date_from=line.date - timedelta(days=1),
+            date_to=line.date + timedelta(days=1),
+            company_id=line.company_id.id,
+        )
+        self.assertGreater(len(rows), 0)
+        ids = [r['move_line_id'] for r in rows]
+        self.assertIn(line.id, ids)
+
+    def test_respects_limit(self):
+        line = self.env['account.move.line'].search([
+            ('parent_state', '=', 'posted'),
+        ], limit=1)
+        if not line:
+            self.skipTest("No posted move lines in DB")
+        rows = fetch_drill_down(
+            self.env,
+            account_id=line.account_id.id,
+            date_from=date(2000, 1, 1),
+            date_to=date(2099, 12, 31),
+            company_id=line.company_id.id,
+            limit=2,
+        )
+        self.assertLessEqual(len(rows), 2)