My Goal, check the dimension of an uploaded Image in a custom validator for the image field in the LeadImageBehavior.
The validator and the registration:
from plone.app.contenttypes.behaviors.leadimage import ILeadImageBehavior
from z3c.form import validator
class ImageSizeValidator(validator.FileUploadValidator):
"""z3c.form validator class for international phone numbers"""
def validate(self, value):
"""Validate international phone number on input"""
super(ImageSizeValidator, self).validate(value)
# here, check the dimension
....
# Set conditions for which fields the validator class applies
validator.WidgetValidatorDiscriminators(
ImageSizeValidator, field=ILeadImageBehavior["image"]
)
The test:
class TestImageSizeValidatorFunctionalTest(unittest.TestCase):
layer = MY_ADDON_FUNCTIONAL_TESTING
def setUp(self):
# ..do some setup stuff
# ... create a news with an image
def test_validator(self):
from plone.dexterity.utils import iterSchemata
from z3c.form.interfaces import IValidator
from zope.schema import getFieldsInOrder
imagefield = None
for schema in iterSchemata(self.portal.news):
print(f"{schema}")
for name, field in getFieldsInOrder(schema):
if name == "image":
imagefield = field
import pdb; pdb.set_trace()
# this check doesn't work
self.assertTrue(IValidator.providedBy(imagefield))
My Question, what is the right way for testing the adapted Validator? Has anyone a hint for me or an example?
Update, i found a solution to test the validator:
class TestImageSizeValidatorIntegrationTest(unittest.TestCase):
layer = MY_ADDON_INTEGRATION_TESTING
def setUp(self):
self.portal = self.layer["portal"]
self.request = self.layer["request"]
self.portal_url = self.portal.absolute_url()
def test_validator(self):
from importlib.resources import files
from plone.app.contenttypes.behaviors.leadimage import ILeadImageBehavior
from plone.namedfile import NamedBlobImage
from my.addon.validators import ImageSizeValidator
from zope.schema.interfaces import WrongType
source = files("my.addon.tests.testcontent").joinpath("im-1600x900.png")
with source.open(mode="rb") as f:
file = NamedBlobImage()
file.contentType = "image/png"
file.data = f.read()
_validator = ImageSizeValidator(
None, None, None, ILeadImageBehavior["image"], None
)
with self.assertRaises(WrongType):
_validator.validate("this is a string")
self.assertIsNone(_validator.validate(file))
