test: opening round off with inclusive tax

erpnext/accounts/doctype/sales_invoice/test_sales_invoice.py

@@ -3891,39 +3891,40 @@ def test_validation_on_opening_invoice_with_rounding(self):
 		si.save()
 		self.assertRaises(frappe.ValidationError, si.submit)
 
-	def test_opening_invoice_with_rounding_adjustment(self):
-		si = create_sales_invoice(qty=1, rate=99.98, do_not_submit=True)
-		si.is_opening = "Yes"
-		si.items[0].income_account = "Temporary Opening - _TC"
-		si.save()
-
+	def _create_opening_roundoff_account(self, company_name):
 		liability_root = frappe.db.get_all(
 			"Account",
-			filters={"company": si.company, "root_type": "Liability", "disabled": 0},
+			filters={"company": company_name, "root_type": "Liability", "disabled": 0},
 			order_by="lft",
 			limit=1,
 		)[0]
 
 		# setup round off account
-		company = frappe.get_doc("Company", si.company)
 		if acc := frappe.db.exists(
 			"Account",
 			{
 				"account_name": "Round Off for Opening",
 				"account_type": "Round Off for Opening",
-				"company": si.company,
+				"company": company_name,
 			},
 		):
-			company.round_off_for_opening = acc
+			frappe.db.set_value("Company", company_name, "round_off_for_opening", acc)
 		else:
 			acc = frappe.new_doc("Account")
-			acc.company = si.company
+			acc.company = company_name
 			acc.parent_account = liability_root.name
 			acc.account_name = "Round Off for Opening"
 			acc.account_type = "Round Off for Opening"
 			acc.save()
-			company.round_off_for_opening = acc.name
-		company.save()
+			frappe.db.set_value("Company", company_name, "round_off_for_opening", acc.name)
+
+	def test_opening_invoice_with_rounding_adjustment(self):
+		si = create_sales_invoice(qty=1, rate=99.98, do_not_submit=True)
+		si.is_opening = "Yes"
+		si.items[0].income_account = "Temporary Opening - _TC"
+		si.save()
+
+		self._create_opening_roundoff_account(si.company)
 
 		si.reload()
 		si.submit()
@@ -3934,6 +3935,57 @@ def test_opening_invoice_with_rounding_adjustment(self):
 		)
 		self.assertEqual(len(res), 3)
 
+	def _create_opening_invoice_with_inclusive_tax(self):
+		si = create_sales_invoice(qty=1, rate=90, do_not_submit=True)
+		si.is_opening = "Yes"
+		si.items[0].income_account = "Temporary Opening - _TC"
+		item_template = si.items[0].as_dict()
+		item_template.name = None
+		item_template.rate = 55
+		si.append("items", item_template)
+		si.append(
+			"taxes",
+			{
+				"charge_type": "On Net Total",
+				"account_head": "_Test Account Service Tax - _TC",
+				"cost_center": "_Test Cost Center - _TC",
+				"description": "Testing...",
+				"rate": 5,
+				"included_in_print_rate": True,
+			},
+		)
+		# there will be 0.01 precision loss between Dr and Cr
+		# caused by 'included_in_print_tax' option
+		si.save()
+		return si
+
+	def test_rounding_validation_for_opening_with_inclusive_tax(self):
+		si = self._create_opening_invoice_with_inclusive_tax()
+		# 'Round Off for Opening' not set in Company master
+		# Ledger level validation must be thrown
+		self.assertRaises(frappe.ValidationError, si.submit)
+
+	def test_ledger_entries_on_opening_invoice_with_rounding_loss_by_inclusive_tax(self):
+		si = self._create_opening_invoice_with_inclusive_tax()
+		# 'Round Off for Opening' is set in Company master
+		self._create_opening_roundoff_account(si.company)
+
+		si.submit()
+		actual = frappe.db.get_all(
+			"GL Entry",
+			filters={"voucher_no": si.name, "is_opening": "Yes"},
+			fields=["account", "debit", "credit", "is_opening"],
+			order_by="account,debit",
+		)
+		expected = [
+			{"account": "_Test Account Service Tax - _TC", "debit": 0.0, "credit": 6.9, "is_opening": "Yes"},
+			{"account": "Debtors - _TC", "debit": 145.0, "credit": 0.0, "is_opening": "Yes"},
+			{"account": "Round Off for Opening - _TC", "debit": 0.0, "credit": 0.01, "is_opening": "Yes"},
+			{"account": "Temporary Opening - _TC", "debit": 0.0, "credit": 138.09, "is_opening": "Yes"},
+		]
+		self.assertEqual(len(actual), 4)
+		self.assertEqual(expected, actual)
+
 
 def set_advance_flag(company, flag, default_account):
 	frappe.db.set_value(