Dev ivan

functional_tests/functional_tests.py

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+from selenium import webdriver
+from selenium.webdriver.common.by import By
+from selenium.webdriver.common.keys import Keys
+from selenium.common.exceptions import WebDriverException
+from selenium.webdriver.support.ui import WebDriverWait
+from selenium.webdriver.support import expected_conditions
+
+import time
+
+from django.contrib.staticfiles.testing import StaticLiveServerTestCase
+
+
+MAX_WAIT = 10
+
+
+class NewVisitorTest(StaticLiveServerTestCase):
+
+    def setUp(self):
+        self.browser = webdriver.Firefox()
+
+    def tearDown(self):
+        self.browser.quit()
+
+    def wait_for_row_in_list_table(self, row_text):
+        start_time = time.time()
+        while True:
+            try:
+                table = self.browser.find_element_by_id('id_list_table')
+                rows = table.find_elements_by_tag_name('tr')
+                self.assertIn(row_text, [row.text for row in rows])
+                return
+            except (AssertionError, WebDriverException) as e:
+                if time.time() - start_time > MAX_WAIT:
+                    raise e
+                time.sleep(0.5)
+
+    def test_can_start_a_list_and_retrieve_it_later(self):
+        # Edith has heard about a cool new online to-do app. She goes
+        # to check out its homepage
+        self.browser.get(self.live_server_url)
+
+        # She notices the page title and header mention to-do lists
+        self.assertIn('To-Do', self.browser.title)
+        header_text = self.browser.find_element_by_tag_name('h1').text
+        self.assertIn('To-Do', header_text)
+
+        # She is invited to enter a to-do item straight away
+        inputbox = self.browser.find_element_by_id('id_new_item')
+        self.assertEqual(
+            inputbox.get_attribute('placeholder'),
+            'Enter a to-do item'
+        )
+
+        # She types "Buy peacock feathers" into a text box (Edith's hobby
+        # is tying fly-fishing lures)
+        inputbox.send_keys('Buy peacock feathers')
+
+        # When she hits enter, the page updates, and now the page lists
+        # "1: Buy peacock feathers" as an item in a to-do list table
+        inputbox.send_keys(Keys.ENTER)
+        WebDriverWait(self.browser, 10).until(
+            expected_conditions.text_to_be_present_in_element(
+                (By.ID, 'id_list_table'), 'Buy peacock feathers'))
+
+        self.wait_for_row_in_list_table('1: Buy peacock feathers')
+
+        # There is still a text box inviting her to add another item. She
+        # enters "Use peacock feathers to make a fly" (Edith is very
+        # methodical)
+        inputbox = self.browser.find_element_by_id('id_new_item')
+        inputbox.send_keys('Use peacock feathers to make a fly')
+        inputbox.send_keys(Keys.ENTER)
+
+        # The page updates again, and now shows both items on her list
+        self.wait_for_row_in_list_table(
+            '2: Use peacock feathers to make a fly'
+            )
+        self.wait_for_row_in_list_table('1: Buy peacock feathers')
+
+        # Edith wonders whether the site will remember her list. Then she sees
+        # that the site has generated a unique URL for her -- there is some
+        # explanatory text to that effect.
+
+    def test_multiple_users_can_start_lists_at_different_urls(self):
+        # Edith start a new todo list
+        self.browser.get(self.live_server_url)
+        inputbox = self.browser.find_element_by_id('id_new_item')
+        inputbox.send_keys('Buy peacock feathers')
+        inputbox.send_keys(Keys.ENTER)
+        self.wait_for_row_in_list_table('1: Buy peacock feathers')
+
+        # She notices that her list has a unique URL
+        edith_list_url = self.browser.current_url
+        self.assertRegex(edith_list_url, '/lists/.+')
+
+        # Now a new user, Francis, comes along to the site.
+
+        # We use a new browser session to make sure that no information
+        # of Edith's is coming through from cookies etc
+        self.browser.quit()
+        self.browser = webdriver.Firefox()
+
+        # Francis visits the home page.  There is no sign of Edith's
+        # list
+        self.browser.get(self.live_server_url)
+        page_text = self.browser.find_element_by_tag_name('body').text
+        self.assertNotIn('Buy peacock feathers', page_text)
+        self.assertNotIn('make a fly', page_text)
+
+        # Francis starts a new list by entering a new item. He
+        # is less interesting than Edith...
+        inputbox = self.browser.find_element_by_id('id_new_item')
+        inputbox.send_keys('Buy milk')
+        inputbox.send_keys(Keys.ENTER)
+        self.wait_for_row_in_list_table('1: Buy milk')
+
+        # Francis gets his own unique URL
+        francis_list_url = self.browser.current_url
+        self.assertRegex(francis_list_url, '/lists/.+')
+        self.assertNotEqual(francis_list_url, edith_list_url)
+
+        # Again, there is no trace of Edith's list
+        page_text = self.browser.find_element_by_tag_name('body').text
+        self.assertNotIn('Buy peacock feathers', page_text)
+        self.assertIn('Buy milk', page_text)
+
+    def test_layout_and_styling(self):
+        # Edith goes to the home page
+        self.browser.get(self.live_server_url)
+        self.browser.set_window_size(1024, 768)
+
+        # She notices the input box is nicely centered
+        inputbox = self.browser.find_element_by_id('id_new_item')
+        self.assertAlmostEqual(
+            inputbox.location['x'] + inputbox.size['width'] / 2,
+            512,
+            delta=5
+        )
+
+        # She starts a new list and sees the input is nicely
+        # centered there too
+        inputbox.send_keys('testing')
+        inputbox.send_keys(Keys.ENTER)
+        self.wait_for_row_in_list_table('1: testing')
+        inputbox = self.browser.find_element_by_id('id_new_item')
+        self.assertAlmostEqual(
+            inputbox.location['x'] + inputbox.size['width'] / 2,
+            512,
+            delta=5
+        )

lists/admin.py

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+from django.contrib import admin
+from lists.models import Item, List
+
+admin.site.register(Item)
+admin.site.register(List)

lists/apps.py

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+from django.apps import AppConfig
+
+
+class ListsConfig(AppConfig):
+    default_auto_field = "django.db.models.BigAutoField"
+    name = "lists"

lists/migrations/0001_initial.py

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+# Generated by Django 4.1.3 on 2022-11-23 14:29
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = []
+
+    operations = [
+        migrations.CreateModel(
+            name="Item",
+            fields=[
+                (
+                    "id",
+                    models.BigAutoField(
+                        auto_created=True,
+                        primary_key=True,
+                        serialize=False,
+                        verbose_name="ID",
+                    ),
+                ),
+            ],
+        ),
+    ]

lists/migrations/0002_item_text.py

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+# Generated by Django 4.1.3 on 2022-11-23 14:38
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("lists", "0001_initial"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="item",
+            name="text",
+            field=models.TextField(default="test"),
+            preserve_default=False,
+        ),
+    ]

lists/migrations/0003_alter_item_text.py

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+# Generated by Django 4.1.3 on 2022-11-23 14:38
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("lists", "0002_item_text"),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="item",
+            name="text",
+            field=models.TextField(blank=True),
+        ),
+    ]

lists/migrations/0004_list_alter_item_text_item_list.py

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+# Generated by Django 4.1.3 on 2022-11-24 14:41
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("lists", "0003_alter_item_text"),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name="List",
+            fields=[
+                (
+                    "id",
+                    models.BigAutoField(
+                        auto_created=True,
+                        primary_key=True,
+                        serialize=False,
+                        verbose_name="ID",
+                    ),
+                ),
+            ],
+        ),
+        migrations.AlterField(
+            model_name="item",
+            name="text",
+            field=models.TextField(default=""),
+        ),
+        migrations.AddField(
+            model_name="item",
+            name="list",
+            field=models.ForeignKey(
+                default=None,
+                on_delete=django.db.models.deletion.CASCADE,
+                to="lists.list",
+            ),
+        ),
+    ]

lists/models.py

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+from django.db import models
+
+
+class List(models.Model):
+    pass
+
+
+class Item(models.Model):
+    text = models.TextField(default='')
+    list = models.ForeignKey(List, default=None, on_delete=models.CASCADE)

lists/templates/base.html

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+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
+    <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.5.0/css/bootstrap.min.css" integrity="sha384-9aIt2nRpC12Uk9gS9baDl411NQApFmC26EwAOH8WgZl5MYYxFfc+NcPb1dKGj7Sk" crossorigin="anonymous">
+    <title>To-Do lists</title>
+  </head>
+  <body>
+    <div class="container">
+        <div class="row">
+            <div class="col-md-6 col-md-offset-3 jumbotron">
+                <div class="text-center">
+                    <h1>{% block header_text %}{% endblock %}</h1>
+                    <form method="POST" action="{% block form_action %}{% endblock %}">
+                        <input name="item_text" id="id_new_item"
+                               class="form-control input-lg"
+                               placeholder="Enter a to-do item"
+                        />
+                        {% csrf_token %}
+                    </form>
+                </div>
+            </div>
+        </div>
+
+        <div class="row">
+            <div class="col-md-6 col-md-offset-3">
+                {% block table %}
+                {% endblock %}
+            </div>
+        </div>
+
+    </div>
+    <!-- Optional JavaScript -->
+    <!-- jQuery first, then Popper.js, then Bootstrap JS -->
+    <script src="https://code.jquery.com/jquery-3.5.1.slim.min.js" integrity="sha384-DfXdz2htPH0lsSSs5nCTpuj/zy4C+OGpamoFVy38MVBnE+IbbVYUew+OrCXaRkfj" crossorigin="anonymous"></script>
+    <script src="https://cdn.jsdelivr.net/npm/popper.js@1.16.0/dist/umd/popper.min.js" integrity="sha384-Q6E9RHvbIyZFJoft+2mJbHaEWldlvI9IOYy5n3zV9zzTtmI3UksdQRVvoxMfooAo" crossorigin="anonymous"></script>
+    <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.5.0/js/bootstrap.min.js" integrity="sha384-OgVRvuATP1z7JjHLkuOU7Xw704+h835Lr+6QL9UvYjZE3Ipu6Tp75j7Bh/kR0JKI" crossorigin="anonymous"></script>
+  </body>
+</html>

lists/templates/home.html

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+{% extends 'base.html' %}
+
+{% block header_text %}Start a new To-Do list{% endblock %}
+
+{% block form_action %}/lists/new{% endblock %}

lists/templates/list.html

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+{% extends 'base.html' %}
+
+{% block header_text %}Your To-Do list{% endblock %}
+
+{% block form_action %}/lists/{{ list.id }}/add_item{% endblock %}
+
+{% block table %}
+    <table id="id_list_table" class="table">
+        {% for item in list.item_set.all %}
+            <tr><td>{{ forloop.counter }}: {{ item.text }}</td></tr>
+        {% endfor %}
+    </table>
+{% endblock %}