Add trade finance ledger foundation

modules/trade_finance/tests/test_module.py

@@ -5,6 +5,7 @@ from datetime import date
 from decimal import Decimal
 
 from trytond.exceptions import UserError
+from trytond.modules.company.tests import create_company, set_company
 from trytond.modules.currency.tests import create_currency
 from trytond.pool import Pool
 from trytond.tests.test_tryton import ModuleTestCase, with_transaction
@@ -35,6 +36,46 @@ class TradeFinanceTestCase(ModuleTestCase):
         facility.save()
         return facility, currency
 
+    def create_trade_finance_case(self):
+        pool = Pool()
+        Cost = pool.get('trade_finance.facility_limit_cost')
+        Haircut = pool.get('trade_finance.facility_limit_haircut')
+        Limit = pool.get('trade_finance.facility_limit')
+        TradeFinance = pool.get('trade.finance')
+
+        facility, currency = self.create_facility()
+        company = create_company(currency=currency)
+        limit, = Limit.create([{
+                    'facility': facility.id,
+                    'name': 'Prefi limit',
+                    'currency': currency.id,
+                    'amount': Decimal('1000000.00'),
+                    'date_from': date(2026, 1, 1),
+                    'date_to': date(2026, 12, 31),
+                    }])
+        Haircut.create([{
+                    'limit': limit.id,
+                    'attribute': 'commodity',
+                    'haircut_pct': Decimal('20.00'),
+                    'date_from': date(2026, 1, 1),
+                    'date_to': date(2026, 12, 31),
+                    }])
+        Cost.create([{
+                    'limit': limit.id,
+                    'cost_type': 'interest',
+                    'spread': Decimal('10.0000'),
+                    'date_from': date(2026, 1, 1),
+                    'date_to': date(2026, 12, 31),
+                    }])
+        with set_company(company):
+            trade_finance, = TradeFinance.create([{
+                        'bank': facility.tfe.id,
+                        'company': company.id,
+                        'currency': currency.id,
+                        'start_date': date(2026, 1, 1),
+                        }])
+        return trade_finance, limit, currency
+
     @with_transaction()
     def test_sublimit_inherits_currency_and_dates(self):
         'Test sublimit inherits currency and dates from parent'
@@ -141,5 +182,147 @@ class TradeFinanceTestCase(ModuleTestCase):
 
         self.assertEqual(child.currency, other_currency)
 
+    @with_transaction()
+    def test_trade_finance_number_sequence(self):
+        'Test trade finance number sequence'
+        trade_finance, _, _ = self.create_trade_finance_case()
+
+        self.assertTrue(trade_finance.number.startswith('TFR-'))
+
+    @with_transaction()
+    def test_post_presentation_uses_facility_limit_ledger(self):
+        'Test posting creates an audited facility limit movement'
+        pool = Pool()
+        Presentation = pool.get('trade.finance.presentation')
+        Line = pool.get('trade.finance.presentation.line')
+
+        trade_finance, limit, currency = self.create_trade_finance_case()
+        presentation, = Presentation.create([{
+                    'trade_finance': trade_finance.id,
+                    'presentation_date': date(2026, 1, 10),
+                    'presentation_type': 'prefi',
+                    'finance_stage': 'prefi',
+                    }])
+        line, = Line.create([{
+                    'presentation': presentation.id,
+                    'facility_limit': limit.id,
+                    'signed_quantity': Decimal('1000.0000'),
+                    'commodity_price': Decimal('100.000000'),
+                    }])
+
+        self.assertEqual(line.currency, currency)
+        self.assertEqual(line.gross_collateral_value, Decimal('100000.0000000000'))
+        self.assertEqual(line.financed_amount, Decimal('100000.0000000000'))
+        Presentation.post([presentation])
+
+        presentation = Presentation(presentation.id)
+        line, = presentation.lines
+        self.assertEqual(presentation.state, 'posted')
+        self.assertEqual(line.haircut_percent_applied, Decimal('20.00'))
+        self.assertEqual(line.interest_rate_applied, Decimal('10.0000'))
+        self.assertEqual(line.day_count_basis_applied, '360')
+        self.assertEqual(line.financed_amount, Decimal('80000.000000000000'))
+        self.assertEqual(
+            line.signed_financed_amount, Decimal('80000.000000000000'))
+
+    @with_transaction()
+    def test_post_presentation_rejects_limit_outside_validity(self):
+        'Test posting validates facility limit validity dates'
+        pool = Pool()
+        Presentation = pool.get('trade.finance.presentation')
+        Line = pool.get('trade.finance.presentation.line')
+
+        trade_finance, limit, _ = self.create_trade_finance_case()
+        presentation, = Presentation.create([{
+                    'trade_finance': trade_finance.id,
+                    'presentation_date': date(2025, 12, 31),
+                    'presentation_type': 'prefi',
+                    'finance_stage': 'prefi',
+                    }])
+        Line.create([{
+                    'presentation': presentation.id,
+                    'facility_limit': limit.id,
+                    'movement_date': date(2025, 12, 31),
+                    'finance_stage': 'prefi',
+                    'currency': trade_finance.currency.id,
+                    'signed_financed_amount': Decimal('100.00'),
+                    }])
+
+        with self.assertRaises(UserError):
+            Presentation.post([presentation])
+
+    @with_transaction()
+    def test_cancel_presentation_creates_reversal(self):
+        'Test cancellation creates a posted reversal movement'
+        pool = Pool()
+        Presentation = pool.get('trade.finance.presentation')
+        Line = pool.get('trade.finance.presentation.line')
+
+        trade_finance, limit, _ = self.create_trade_finance_case()
+        presentation, = Presentation.create([{
+                    'trade_finance': trade_finance.id,
+                    'presentation_date': date(2026, 1, 10),
+                    'presentation_type': 'prefi',
+                    'finance_stage': 'prefi',
+                    }])
+        Line.create([{
+                    'presentation': presentation.id,
+                    'facility_limit': limit.id,
+                    'movement_date': date(2026, 1, 10),
+                    'finance_stage': 'prefi',
+                    'currency': trade_finance.currency.id,
+                    'signed_financed_amount': Decimal('80000.00'),
+                    }])
+        Presentation.post([presentation])
+        Presentation.cancel([presentation])
+
+        presentations = Presentation.search([
+                ('trade_finance', '=', trade_finance.id),
+                ], order=[('sequence', 'ASC')])
+        self.assertEqual(len(presentations), 2)
+        self.assertEqual(presentations[0].state, 'cancelled')
+        self.assertEqual(presentations[1].state, 'posted')
+        reversal_line, = presentations[1].lines
+        self.assertEqual(reversal_line.signed_financed_amount, Decimal('-80000.00'))
+
+        trade_finance = pool.get('trade.finance')(trade_finance.id)
+        self.assertEqual(trade_finance.exposure_amount, Decimal('0.00'))
+
+    @with_transaction()
+    def test_create_financing_wizard(self):
+        'Test single input financing creation wizard'
+        pool = Pool()
+        TradeFinance = pool.get('trade.finance')
+        Wizard = pool.get('trade.finance.create', type='wizard')
+
+        _, limit, _ = self.create_trade_finance_case()
+        company = create_company(currency=limit.currency)
+        session_id, start_state, _ = Wizard.create()
+        Wizard.execute(session_id, {
+                start_state: {
+                    'facility_limit': limit.id,
+                    'company': company.id,
+                    'bank_reference': 'BANK/TEST/001',
+                    'start_date': date(2026, 1, 10),
+                    'presentation_date': date(2026, 1, 10),
+                    'presentation_type': 'prefi',
+                    'finance_stage': 'prefi',
+                    'signed_quantity': Decimal('1000.0000'),
+                    'commodity_price': Decimal('100.000000'),
+                    'signed_financed_amount': Decimal('80000.00'),
+                    'post': True,
+                    },
+                }, 'create_')
+
+        trade_finance, = TradeFinance.search([
+                ('bank_reference', '=', 'BANK/TEST/001'),
+                ])
+        presentation, = trade_finance.presentations
+        line, = presentation.lines
+        self.assertEqual(trade_finance.bank, limit.facility.tfe)
+        self.assertEqual(trade_finance.currency, limit.currency)
+        self.assertEqual(presentation.state, 'posted')
+        self.assertEqual(line.facility_limit, limit)
+
 
 del ModuleTestCase