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from wtforms import Form
from wtforms.fields import StringField
from wtforms.validators import DataRequired
from wtforms_test import FormTestCase
from tests import MultiDict
from wtforms_components import If
class TestIfValidator(FormTestCase):
def test_only_validates_if_condition_returns_true(self):
class MyForm(Form):
name = StringField(
validators=[
If(
lambda form, field: False,
DataRequired(),
)
]
)
form = MyForm(MultiDict({"name": ""}))
form.validate()
assert not form.errors
def test_encapsulates_given_validator(self):
class MyForm(Form):
name = StringField(
validators=[
If(
lambda form, field: True,
DataRequired(),
)
]
)
form = MyForm(MultiDict({"name": ""}))
form.validate()
assert "name" in form.errors
def test_supports_custom_error_messages(self):
class MyForm(Form):
name = StringField(
validators=[
If(
lambda form, field: True,
DataRequired(),
message="Validation failed.",
)
]
)
form = MyForm(MultiDict({"name": ""}))
form.validate()
assert form.errors["name"] == ["Validation failed."]
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