from django import forms

from django.db import models

from django.test import SimpleTestCase, TestCase

from .models import Post

class TextFieldTests(TestCase):

    def test_max_length_passed_to_formfield(self):

        """

        TextField passes its max_length attribute to form fields created using

        their formfield() method.

        """

        tf1 = models.TextField()

        tf2 = models.TextField(max_length=2345)

        self.assertIsNone(tf1.formfield().max_length)

        self.assertEqual(2345, tf2.formfield().max_length)

    def test_choices_generates_select_widget(self):

        """A TextField with choices uses a Select widget."""

        f = models.TextField(choices=[("A", "A"), ("B", "B")])

        self.assertIsInstance(f.formfield().widget, forms.Select)

    def test_to_python(self):

        """TextField.to_python() should return a string."""

        f = models.TextField()

        self.assertEqual(f.to_python(1), "1")

    def test_lookup_integer_in_textfield(self):

        self.assertEqual(Post.objects.filter(body=24).count(), 0)

    def test_emoji(self):

        p = Post.objects.create(title="Whatever", body="Smile 😀.")

        p.refresh_from_db()

        self.assertEqual(p.body, "Smile 😀.")

class TestMethods(SimpleTestCase):

    def test_deconstruct(self):

        field = models.TextField()

        *_, kwargs = field.deconstruct()

        self.assertEqual(kwargs, {})

        field = models.TextField(db_collation="utf8_esperanto_ci")

        *_, kwargs = field.deconstruct()

        self.assertEqual(kwargs, {"db_collation": "utf8_esperanto_ci"})