=========================
Purchase Request Scenario
=========================

Imports::

    >>> import datetime as dt
    >>> from decimal import Decimal

    >>> from proteus import Model, Wizard
    >>> from trytond.modules.account.tests.tools import create_chart, get_accounts
    >>> from trytond.modules.company.tests.tools import create_company
    >>> from trytond.tests.tools import activate_modules, assertEqual, set_user

    >>> today = dt.date.today()

Activate modules::

    >>> config = activate_modules(
    ...     ['purchase_request', 'stock_supply'],
    ...     create_company, create_chart)

Get accounts::

    >>> accounts = get_accounts()
    >>> expense = accounts['expense']

Create parties::

    >>> Party = Model.get('party.party')
    >>> customer = Party(name='Customer')
    >>> customer.save()
    >>> supplier = Party(name='Supplier')
    >>> supplier.save()

Create account category::

    >>> ProductCategory = Model.get('product.category')
    >>> account_category = ProductCategory(name="Account Category")
    >>> account_category.accounting = True
    >>> account_category.account_expense = expense
    >>> account_category.save()

Create product::

    >>> ProductUom = Model.get('product.uom')
    >>> ProductTemplate = Model.get('product.template')
    >>> unit, = ProductUom.find([('name', '=', 'Unit')])

    >>> template = ProductTemplate()
    >>> template.name = 'Product'
    >>> template.default_uom = unit
    >>> template.type = 'goods'
    >>> template.list_price = Decimal('20')
    >>> template.purchasable = True
    >>> template.account_category = account_category
    >>> product, = template.products
    >>> product.cost_price = Decimal('8')
    >>> template.save()
    >>> product, = template.products

Get stock locations::

    >>> Location = Model.get('stock.location')
    >>> warehouse_loc, = Location.find([('code', '=', 'WH')])
    >>> supplier_loc, = Location.find([('code', '=', 'SUP')])
    >>> customer_loc, = Location.find([('code', '=', 'CUS')])
    >>> output_loc, = Location.find([('code', '=', 'OUT')])
    >>> storage_loc, = Location.find([('code', '=', 'STO')])

Create a need for missing product::

    >>> ShipmentOut = Model.get('stock.shipment.out')
    >>> shipment_out = ShipmentOut()
    >>> shipment_out.planned_date = today
    >>> shipment_out.effective_date = today
    >>> shipment_out.customer = customer
    >>> shipment_out.warehouse = warehouse_loc
    >>> move = shipment_out.outgoing_moves.new()
    >>> move.product = product
    >>> move.unit = unit
    >>> move.quantity = 1
    >>> move.from_location = output_loc
    >>> move.to_location = customer_loc
    >>> move.company = shipment_out.company
    >>> move.unit_price = Decimal('1')
    >>> move.currency = shipment_out.company.currency
    >>> shipment_out.click('wait')

There is no purchase request::

    >>> PurchaseRequest = Model.get('purchase.request')
    >>> PurchaseRequest.find([])
    []

Create the purchase request::

    >>> create_pr = Wizard('stock.supply')
    >>> create_pr.execute('create_')

There is now a draft purchase request::

    >>> pr, = PurchaseRequest.find([('state', '=', 'draft')])
    >>> assertEqual(pr.product, product)
    >>> pr.quantity
    1.0

Create the purchase then cancel it::

    >>> create_purchase = pr.click('create_purchase')
    >>> create_purchase.form.party = supplier
    >>> create_purchase.execute('start')
    >>> pr.state
    'purchased'
    >>> (purchase,), = create_purchase.actions
    >>> purchase.click('cancel')
    >>> pr.reload()
    >>> pr.state
    'exception'

Handle the exception::

    >>> handle_exception = pr.click('handle_purchase_cancellation_exception')
    >>> handle_exception.execute('reset')
    >>> pr.state
    'draft'

Recreate a purchase and cancel it again::

    >>> create_purchase = pr.click('create_purchase')
    >>> pr.state
    'purchased'
    >>> (purchase,), = create_purchase.actions
    >>> purchase.click('cancel')
    >>> pr.reload()
    >>> pr.state
    'exception'

Handle again the exception::

    >>> handle_exception = pr.click('handle_purchase_cancellation_exception')
    >>> handle_exception.execute('cancel_request')
    >>> pr.state
    'cancelled'

Re-create the purchase request::

    >>> create_pr = Wizard('stock.supply')
    >>> create_pr.execute('create_')

Create a second purchase request manually::

    >>> ctx = config.context
    >>> set_user(0)  # root
    >>> pr_id, = PurchaseRequest.create([{
    ...             'product': product.id,
    ...             'quantity': 1,
    ...             'unit': unit,
    ...             'warehouse': warehouse_loc.id,
    ...             'origin': 'stock.order_point,-1',
    ...             }], ctx)
    >>> set_user()
    >>> pr = PurchaseRequest(pr_id)

There is now 2 draft purchase requests::

    >>> prs = PurchaseRequest.find([('state', '=', 'draft')])
    >>> len(prs)
    2

Create the purchase with a unique line::

    >>> create_purchase = PurchaseRequest.click(prs, 'create_purchase')
    >>> create_purchase.form.party = supplier
    >>> create_purchase.execute('start')
    >>> pr.state
    'purchased'
    >>> (purchase,), = create_purchase.actions
    >>> len(purchase.lines)
    1
    >>> line, = purchase.lines
    >>> assertEqual(line.product, product)
    >>> line.quantity
    2.0
    >>> assertEqual(line.unit, unit)

Create a purchase request without product::

    >>> ctx = config.context
    >>> set_user(0)  # root
    >>> pr_id, = PurchaseRequest.create([{
    ...             'description': "Custom product",
    ...             'quantity': 1,
    ...             'origin': 'stock.order_point,-1',
    ...             }], ctx)
    >>> set_user()
    >>> pr = PurchaseRequest(pr_id)
    >>> pr.save()

Create the purchase without product::

    >>> create_purchase = pr.click('create_purchase')
    >>> create_purchase.form.party = supplier
    >>> create_purchase.execute('start')
    >>> pr.state
    'purchased'

    >>> pr.purchase_line.product
    >>> pr.purchase_line.description
    'Custom product'
    >>> pr.purchase_line.quantity
    1.0
    >>> pr.purchase_line.unit
    >>> pr.purchase_line.unit_price

It's not possible to delete a purchase linked to a purchase_request::

    >>> pr.purchase_line.purchase.delete()
    Traceback (most recent call last):
        ...
    AccessError: ...