File: test_custom_fields.py

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wtforms-alchemy 0.19.0-3
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from wtforms import Form
from wtforms_components import SelectField

from tests import MultiDict
from wtforms_alchemy import null_or_unicode


class TestSelectField:
    def test_understands_none_values(self):
        class MyForm(Form):
            choice_field = SelectField(
                choices=[("", "-- Choose --"), ("choice 1", "Something")],
                coerce=null_or_unicode,
            )

        form = MyForm(MultiDict({"choice_field": ""}))
        form.validate()
        assert form.errors == {}