Add assert methods to test tools

Closes #12879

modules/purchase_secondary_unit/tests/scenario_purchase_blanket_agreement_secondary_unit.rst

@@ -8,7 +8,7 @@ Imports::
     >>> from decimal import Decimal
 
     >>> from proteus import Model, Wizard
-    >>> from trytond.tests.tools import activate_modules
+    >>> from trytond.tests.tools import activate_modules, assertEqual
     >>> from trytond.modules.company.tests.tools import (
     ...     create_company, get_company)
     >>> from trytond.modules.account.tests.tools import (
@@ -89,24 +89,20 @@ Create purchase from blanket agreement::
 
     >>> create_purchase = Wizard(
     ...     'purchase.blanket_agreement.create_purchase', [blanket_agreement])
-    >>> create_purchase.form.lines[0].unit == gr
-    True
+    >>> assertEqual(create_purchase.form.lines[0].unit, gr)
     >>> create_purchase.execute('create_purchase')
 
     >>> purchase, = create_purchase.actions[0]
     >>> line, = purchase.lines
-    >>> line.product == product
-    True
+    >>> assertEqual(line.product, product)
 
-    >>> line.secondary_unit == gr
-    True
+    >>> assertEqual(line.secondary_unit, gr)
     >>> line.secondary_quantity
     800.0
     >>> line.secondary_unit_price
     Decimal('7.0000')
 
-    >>> line.unit == unit
-    True
+    >>> assertEqual(line.unit, unit)
     >>> line.quantity
     8.0
     >>> line.unit_price

modules/purchase_secondary_unit/tests/scenario_purchase_requisition_secondary_unit.rst

@@ -8,7 +8,7 @@ Imports::
     >>> from decimal import Decimal
 
     >>> from proteus import Model, Wizard
-    >>> from trytond.tests.tools import activate_modules
+    >>> from trytond.tests.tools import activate_modules, assertEqual
     >>> from trytond.modules.company.tests.tools import (
     ...     create_company, get_company)
     >>> from trytond.modules.account.tests.tools import (
@@ -100,8 +100,7 @@ Create Purchase order from Request::
     >>> create_purchase.execute('start')
     >>> request.state
     'purchased'
-    >>> request.purchase_line.unit == unit
-    True
+    >>> assertEqual(request.purchase_line.unit, unit)
     >>> request.purchase_line.quantity
     3.0
     >>> request.purchase_line.unit_price

modules/purchase_secondary_unit/tests/scenario_purchase_secondary_unit.rst

@@ -6,7 +6,7 @@ Imports::
 
     >>> from decimal import Decimal
     >>> from proteus import Model, Wizard
-    >>> from trytond.tests.tools import activate_modules
+    >>> from trytond.tests.tools import activate_modules, assertEqual
     >>> from trytond.modules.company.tests.tools import create_company, \
     ...     get_company
     >>> from trytond.modules.account.tests.tools import create_chart, \
@@ -123,8 +123,7 @@ Check secondary unit on invoice::
 
     >>> invoice, = purchase.invoices
     >>> line, = invoice.lines
-    >>> line.secondary_unit == kg
-    True
+    >>> assertEqual(line.secondary_unit, kg)
     >>> line.secondary_quantity
     2.0
     >>> line.secondary_unit_price
@@ -133,8 +132,7 @@ Check secondary unit on invoice::
 Check secondary unit on move::
 
     >>> move, = purchase.moves
-    >>> move.secondary_unit == kg
-    True
+    >>> assertEqual(move.secondary_unit, kg)
     >>> move.secondary_quantity
     2.0
     >>> move.secondary_unit_price