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modules/sale_discount/tests/scenario_sale_discount.rst

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+======================
+Sale Discount Scenario
+======================
+
+Imports::
+
+    >>> from decimal import Decimal
+
+    >>> from proteus import Model
+    >>> from trytond.modules.company.tests.tools import create_company
+    >>> from trytond.tests.tools import activate_modules
+
+Activate modules::
+
+    >>> config = activate_modules('sale_discount', create_company)
+
+Create parties::
+
+    >>> Party = Model.get('party.party')
+    >>> customer = Party(name="Customer")
+    >>> customer.save()
+
+Create product::
+
+    >>> ProductUom = Model.get('product.uom')
+    >>> unit, = ProductUom.find([('name', '=', 'Unit')])
+    >>> ProductTemplate = Model.get('product.template')
+
+    >>> template = ProductTemplate()
+    >>> template.name = 'product'
+    >>> template.default_uom = unit
+    >>> template.type = 'goods'
+    >>> template.salable = True
+    >>> template.list_price = Decimal('10')
+    >>> template.save()
+    >>> product, = template.products
+
+Create a sale::
+
+    >>> Sale = Model.get('sale.sale')
+    >>> sale = Sale()
+    >>> sale.party = customer
+    >>> line = sale.lines.new()
+    >>> line.product = product
+    >>> line.quantity = 1
+    >>> line.base_price
+    Decimal('10.0000')
+    >>> line.unit_price
+    Decimal('10.0000')
+
+Set a discount of 10%::
+
+    >>> line.discount_rate = Decimal('0.1')
+    >>> line.unit_price
+    Decimal('9.0000')
+    >>> line.discount_amount
+    Decimal('1.0000')
+    >>> line.discount
+    '10%'
+
+    >>> sale.save()
+    >>> line, = sale.lines
+    >>> line.unit_price
+    Decimal('9.0000')
+    >>> line.discount_amount
+    Decimal('1.0000')
+    >>> line.discount
+    '10%'
+
+Set a discount amount::
+
+    >>> line.discount_amount = Decimal('3.3333')
+    >>> line.unit_price
+    Decimal('6.6667')
+    >>> line.discount_rate
+    Decimal('0.3333')
+    >>> line.discount
+    '$3.3333'