def test_getting_modified_copy(fixture):
"""It is possible to get a modified copy of an existing field if you want to link it with
different constraints on a different input"""
other_constraint = ValidationConstraint('Other error')
other_constraint.name = 'other'
field = Field()
field.add_validation_constraint(other_constraint)
model_object = EmptyStub()
field.bind('field_name', model_object)
# Getting a copy
new_field = field.copy()
assert new_field is not field
assert new_field.name == field.name
assert new_field.storage_object == field.storage_object
assert new_field.default == field.default
assert new_field.label == field.label
copied_other_constraint = new_field.get_validation_constraint_named(other_constraint.name)
assert copied_other_constraint.field is new_field
new_validation_constraints = [i.__class__ for i in new_field.validation_constraints]
old_validation_constraints = [i.__class__ for i in field.validation_constraints]
assert new_validation_constraints == old_validation_constraints
assert new_field.validation_constraints != field.validation_constraints
assert new_field.validation_constraints is not field.validation_constraints
assert new_field.access_rights is not field.access_rights
assert new_field.access_rights.readable is field.access_rights.readable
assert new_field.access_rights.writable is field.access_rights.writable
# Getting a required copy
assert not field.required
required_field = field.as_required(required_message='new required message')
assert required_field.required
required = required_field.get_validation_constraint_named(RequiredConstraint.name)
assert required.error_message.template == 'new required message'
# Getting copy that's not required
field.make_required('')
assert field.required
optional_field = field.as_optional()
assert not optional_field.required
# Getting copy with a ValidationConstraint of certain type removed
assert field.required
more_lax_field = field.without_validation_constraint(RequiredConstraint)
assert not more_lax_field.required
# Getting copy with a new ValidationConstraint added
field.make_optional()
assert not field.required
more_strict_field = field.with_validation_constraint(RequiredConstraint())
assert more_strict_field.required
# Getting copy with a new label
assert field.label != 'new label'
differently_labelled_field = field.with_label('new label')
assert differently_labelled_field.label == 'new label'
def getting_modified_copy(self, fixture):
"""It is possible to get a modified copy of an existing field if you want to link it with
different constraints on a different input"""
other_constraint = ValidationConstraint('Other error')
other_constraint.name = 'other'
field = Field()
field.add_validation_constraint(other_constraint)
# Getting a copy
new_field = field.copy()
vassert( new_field is not field )
vassert( new_field.name == field.name )
vassert( new_field.storage_object == field.storage_object )
vassert( new_field.default == field.default )
vassert( new_field.label == field.label )
copied_other_constraint = new_field.get_validation_constraint_named(other_constraint.name)
vassert( copied_other_constraint.field is new_field )
new_validation_constraints = [i.__class__ for i in new_field.validation_constraints]
old_validation_constraints = [i.__class__ for i in field.validation_constraints]
vassert( new_validation_constraints == old_validation_constraints )
vassert( new_field.validation_constraints != field.validation_constraints )
vassert( new_field.validation_constraints is not field.validation_constraints )
vassert( new_field.access_rights is not field.access_rights )
vassert( new_field.access_rights.readable is field.access_rights.readable )
vassert( new_field.access_rights.writable is field.access_rights.writable )
# Getting a required copy
vassert( not field.required )
required_field = field.as_required(required_message='new required message')
vassert( required_field.required )
required = required_field.get_validation_constraint_named(RequiredConstraint.name)
vassert( required.error_message.template == 'new required message' )
# Getting copy that's not required
field.make_required('')
vassert( field.required )
optional_field = field.as_optional()
vassert( not optional_field.required )
# Getting copy with a ValidationConstraint of certain type removed
vassert( field.required )
more_lax_field = field.as_without_validation_constraint(RequiredConstraint)
vassert( not more_lax_field.required )
# Getting copy with a new ValidationConstraint added
field.make_optional()
vassert( not field.required )
more_strict_field = field.as_with_validation_constraint(RequiredConstraint())
vassert( more_strict_field.required )