Update test_loan_permanent.py

account_loan_permanent/tests/test_loan_permanent.py

@@ -150,3 +150,50 @@ def test_create_next_line(self):
         self.assertEqual(
             new_line.pending_principal_amount, last_line.final_pending_principal_amount
         )
+
+    def test_onchange_is_permanent_with_interest_type(self):
+        """Test onchange behavior when loan type is 'interest'."""
+        self.test_loan.loan_type = "interest"
+        self.test_loan.is_permanent = True
+        self.test_loan._onchange_is_permanent()
+        self.assertTrue(self.test_loan.is_permanent)
+        self.assertEqual(self.test_loan.residual_amount, 0)
+        self.assertGreaterEqual(self.test_loan.periods, self.test_loan.min_periods)
+
+    def test_generate_loan_entries_for_permanent_loan(self):
+        """Test generation of loan entries for permanent loans."""
+        self.test_loan.start_date = fields.Date.today() - relativedelta(months=2)
+        self.test_loan.post()
+        future_date = fields.Date.today() + relativedelta(months=3)
+        self.loan_model._generate_loan_entries(future_date)
+        self.assertGreater(len(self.test_loan.line_ids), self.test_loan.min_periods)
+        last_line = self.test_loan.line_ids.sorted(key=lambda r: r.sequence)[-1]
+        self.assertGreater(last_line.date, future_date)
+
+    def test_create_next_line_for_permanent_loan(self):
+        """Test creation of next line for permanent loans."""
+        self.test_loan.post()
+        last_line = self.test_loan.line_ids.sorted(key=lambda r: r.sequence)[-1]
+        new_line = self.env['account.loan.line']._create_next_line(last_line)
+        self.assertEqual(new_line.sequence, last_line.sequence + 1)
+        self.assertEqual(new_line.date, last_line.date + relativedelta(months=1))
+        self.assertEqual(new_line.pending_principal_amount, self.test_loan.loan_amount)
+        self.assertEqual(new_line.long_term_pending_principal_amount, self.test_loan.loan_amount)
+
+    def test_compute_interests_for_permanent_loan(self):
+        """Test interest computation for permanent loans."""
+        self.test_loan.post()
+        line = self.test_loan.line_ids[0]
+        line._compute_interests()
+        expected_interest = self.test_loan.loan_amount * self.test_loan.rate_period / 100
+        self.assertAlmostEqual(line.interests_amount, expected_interest, places=2)
+
+    def test_compute_amount_for_permanent_loan(self):
+        """Test amount computation for permanent loans."""
+        self.test_loan.post()
+        line = self.test_loan.line_ids[0]
+        line._compute_amount()
+        self.assertEqual(line.payment_amount, line.interests_amount)
+        self.assertEqual(line.principal_amount, 0)
+        self.assertEqual(line.pending_principal_amount, self.test_loan.loan_amount)
+        self.assertEqual(line.final_pending_principal_amount, self.test_loan.loan_amount)