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diff --git a/addons/product_margin/tests/__init__.py b/addons/product_margin/tests/__init__.py
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+++ b/addons/product_margin/tests/__init__.py
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+# -*- coding: utf-8 -*-
+# Part of Odoo. See LICENSE file for full copyright and licensing details.
+
+from . import test_product_margin
diff --git a/addons/product_margin/tests/test_product_margin.py b/addons/product_margin/tests/test_product_margin.py
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+++ b/addons/product_margin/tests/test_product_margin.py
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+# -*- coding: utf-8 -*-
+# Part of Odoo. See LICENSE file for full copyright and licensing details.
+from odoo.addons.account.tests.common import AccountTestInvoicingCommon
+from odoo.tests import tagged
+
+
+@tagged('post_install', '-at_install')
+class TestProductMargin(AccountTestInvoicingCommon):
+
+    def test_product_margin(self):
+        ''' In order to test the product_margin module '''
+
+        supplier = self.env['res.partner'].create({'name': 'Supplier'})
+        customer = self.env['res.partner'].create({'name': 'Customer'})
+        ipad = self.env['product.product'].create({
+            'name': 'Ipad',
+            'standard_price': 500.0,
+            'list_price': 750.0,
+        })
+
+        invoices = self.env['account.move'].create([
+            {
+                'move_type': 'in_invoice',
+                'partner_id': supplier.id,
+                'invoice_line_ids': [(0, 0, {'product_id': ipad.id, 'quantity': 10.0, 'price_unit': 300.0})],
+            },
+            {
+                'move_type': 'in_invoice',
+                'partner_id': supplier.id,
+                'invoice_line_ids': [(0, 0, {'product_id': ipad.id, 'quantity': 4.0, 'price_unit': 450.0})],
+            },
+            {
+                'move_type': 'out_invoice',
+                'partner_id': customer.id,
+                'invoice_line_ids': [(0, 0, {'product_id': ipad.id, 'quantity': 20.0, 'price_unit': 750.0})],
+            },
+            {
+                'move_type': 'out_invoice',
+                'partner_id': customer.id,
+                'invoice_line_ids': [(0, 0, {'product_id': ipad.id, 'quantity': 10.0, 'price_unit': 550.0})],
+            },
+        ])
+        invoices.invoice_date = invoices[0].date
+        invoices.action_post()
+
+        result = ipad._compute_product_margin_fields_values()
+
+        # Sale turnover ( Quantity * Price Subtotal / Quantity)
+        sale_turnover = ((20.0 * 750.00) + (10.0 * 550.00))
+
+        # Expected sale (Total quantity * Sale price)
+        sale_expected = (750.00 * 30.0)
+
+        # Purchase total cost (Quantity * Unit price)
+        purchase_total_cost = ((10.0 * 300.00) + (4.0 * 450.00))
+
+        # Purchase normal cost ( Total quantity * Cost price)
+        purchase_normal_cost = (14.0 * 500.00)
+
+        total_margin = sale_turnover - purchase_total_cost
+        expected_margin = sale_expected - purchase_normal_cost
+
+        # Check total margin
+        self.assertEqual(result[ipad.id]['total_margin'], total_margin, "Wrong Total Margin.")
+
+        # Check expected margin
+        self.assertEqual(result[ipad.id]['expected_margin'], expected_margin, "Wrong Expected Margin.")