from django.db import models

class UserId(models.Model):
    userId = models.IntegerField(unique=True)

class Contact(models.Model):
    userId = models.ForeignKey('UserId', on_delete=models.CASCADE)
    name = models.CharField(max_length=50)
    email = models.EmailField(unique=True)
    phone = models.IntegerField(unique=True)

    def __str__(self):
        return self.name

from django.test import TestCase
from ng.models import Contact


class TestContactModel(TestCase):
    def setUp(self):
        self.contact = Contact(userId=25, name='jhon doe', email='testt@fk.com', phone=215448)
        self.contact.save()

    def test_contact_creation(self):
        self.assertEqual(Contact.objects.count(), 1)

    def test_contact_representation(self):
        self.assertEqual(self.contact.name, str(self.contact))