From 24e540fbd71bd2b0843e751bde61ad0052a811b3 Mon Sep 17 00:00:00 2001
From: Carlton Gibson <carlton.gibson@noumenal.es>
Date: Thu, 24 Oct 2019 16:37:55 +0200
Subject: Fixed #29087 -- Added delete buttons for unsaved admin inlines on
 validation error.

---
 tests/admin_inlines/models.py | 10 +++++
 tests/admin_inlines/tests.py  | 94 ++++++++++++++++++++++++++++++++++++++++++-
 2 files changed, 103 insertions(+), 1 deletion(-)

(limited to 'tests/admin_inlines')

diff --git a/tests/admin_inlines/models.py b/tests/admin_inlines/models.py
index a42e2588e9..1a705c55c7 100644
--- a/tests/admin_inlines/models.py
+++ b/tests/admin_inlines/models.py
@@ -110,11 +110,21 @@ class Inner4Stacked(models.Model):
     dummy = models.IntegerField(help_text="Awesome stacked help text is awesome.")
     holder = models.ForeignKey(Holder4, models.CASCADE)
 
+    class Meta:
+        constraints = [
+            models.UniqueConstraint(fields=['dummy', 'holder'], name='unique_stacked_dummy_per_holder')
+        ]
+
 
 class Inner4Tabular(models.Model):
     dummy = models.IntegerField(help_text="Awesome tabular help text is awesome.")
     holder = models.ForeignKey(Holder4, models.CASCADE)
 
+    class Meta:
+        constraints = [
+            models.UniqueConstraint(fields=['dummy', 'holder'], name='unique_tabular_dummy_per_holder')
+        ]
+
 # Models for #12749
 
 
diff --git a/tests/admin_inlines/tests.py b/tests/admin_inlines/tests.py
index fe0d913b0d..a43c43560f 100644
--- a/tests/admin_inlines/tests.py
+++ b/tests/admin_inlines/tests.py
@@ -145,7 +145,7 @@ class TestInline(TestDataMixin, TestCase):
         # Here colspan is "4": two fields (title1 and title2), one hidden field and the delete checkbox.
         self.assertContains(
             response,
-            '<tr><td colspan="4"><ul class="errorlist nonfield">'
+            '<tr class="row-form-errors"><td colspan="4"><ul class="errorlist nonfield">'
             '<li>The two titles must be the same</li></ul></td></tr>'
         )
 
@@ -907,8 +907,100 @@ class SeleniumTests(AdminSeleniumTestCase):
         self.assertEqual(rows_length(), 5, msg="sanity check")
         for delete_link in self.selenium.find_elements_by_css_selector('%s .inline-deletelink' % inline_id):
             delete_link.click()
+        with self.disable_implicit_wait():
+            self.assertEqual(rows_length(), 0)
+
+    def test_delete_invalid_stacked_inlines(self):
+        from selenium.common.exceptions import NoSuchElementException
+        self.admin_login(username='super', password='secret')
+        self.selenium.get(self.live_server_url + reverse('admin:admin_inlines_holder4_add'))
+
+        inline_id = '#inner4stacked_set-group'
+
+        def rows_length():
+            return len(self.selenium.find_elements_by_css_selector('%s .dynamic-inner4stacked_set' % inline_id))
         self.assertEqual(rows_length(), 3)
 
+        add_button = self.selenium.find_element_by_link_text(
+            'Add another Inner4 stacked')
+        add_button.click()
+        add_button.click()
+        self.assertEqual(len(self.selenium.find_elements_by_css_selector('#id_inner4stacked_set-4-dummy')), 1)
+
+        # Enter some data and click 'Save'.
+        self.selenium.find_element_by_name('dummy').send_keys('1')
+        self.selenium.find_element_by_name('inner4stacked_set-0-dummy').send_keys('100')
+        self.selenium.find_element_by_name('inner4stacked_set-1-dummy').send_keys('101')
+        self.selenium.find_element_by_name('inner4stacked_set-2-dummy').send_keys('222')
+        self.selenium.find_element_by_name('inner4stacked_set-3-dummy').send_keys('103')
+        self.selenium.find_element_by_name('inner4stacked_set-4-dummy').send_keys('222')
+        self.selenium.find_element_by_xpath('//input[@value="Save"]').click()
+        self.wait_page_loaded()
+
+        self.assertEqual(rows_length(), 5, msg="sanity check")
+        errorlist = self.selenium.find_element_by_css_selector(
+            '%s .dynamic-inner4stacked_set .errorlist li' % inline_id
+        )
+        self.assertEqual('Please correct the duplicate values below.', errorlist.text)
+        delete_link = self.selenium.find_element_by_css_selector('#inner4stacked_set-4 .inline-deletelink')
+        delete_link.click()
+        self.assertEqual(rows_length(), 4)
+        with self.disable_implicit_wait(), self.assertRaises(NoSuchElementException):
+            self.selenium.find_element_by_css_selector('%s .dynamic-inner4stacked_set .errorlist li' % inline_id)
+
+        self.selenium.find_element_by_xpath('//input[@value="Save"]').click()
+        self.wait_page_loaded()
+
+        # The objects have been created in the database.
+        self.assertEqual(Inner4Stacked.objects.all().count(), 4)
+
+    def test_delete_invalid_tabular_inlines(self):
+        from selenium.common.exceptions import NoSuchElementException
+        self.admin_login(username='super', password='secret')
+        self.selenium.get(self.live_server_url + reverse('admin:admin_inlines_holder4_add'))
+
+        inline_id = '#inner4tabular_set-group'
+
+        def rows_length():
+            return len(self.selenium.find_elements_by_css_selector('%s .dynamic-inner4tabular_set' % inline_id))
+        self.assertEqual(rows_length(), 3)
+
+        add_button = self.selenium.find_element_by_link_text(
+            'Add another Inner4 tabular')
+        add_button.click()
+        add_button.click()
+        self.assertEqual(len(self.selenium.find_elements_by_css_selector('#id_inner4tabular_set-4-dummy')), 1)
+
+        # Enter some data and click 'Save'.
+        self.selenium.find_element_by_name('dummy').send_keys('1')
+        self.selenium.find_element_by_name('inner4tabular_set-0-dummy').send_keys('100')
+        self.selenium.find_element_by_name('inner4tabular_set-1-dummy').send_keys('101')
+        self.selenium.find_element_by_name('inner4tabular_set-2-dummy').send_keys('222')
+        self.selenium.find_element_by_name('inner4tabular_set-3-dummy').send_keys('103')
+        self.selenium.find_element_by_name('inner4tabular_set-4-dummy').send_keys('222')
+        self.selenium.find_element_by_xpath('//input[@value="Save"]').click()
+        self.wait_page_loaded()
+
+        self.assertEqual(rows_length(), 5, msg="sanity check")
+
+        # Non-field errorlist is in its own <tr> just before
+        # tr#inner4tabular_set-3:
+        errorlist = self.selenium.find_element_by_css_selector(
+            '%s #inner4tabular_set-3 + .row-form-errors .errorlist li' % inline_id
+        )
+        self.assertEqual('Please correct the duplicate values below.', errorlist.text)
+        delete_link = self.selenium.find_element_by_css_selector('#inner4tabular_set-4 .inline-deletelink')
+        delete_link.click()
+        self.assertEqual(rows_length(), 4)
+        with self.disable_implicit_wait(), self.assertRaises(NoSuchElementException):
+            self.selenium.find_element_by_css_selector('%s .dynamic-inner4tabular_set .errorlist li' % inline_id)
+
+        self.selenium.find_element_by_xpath('//input[@value="Save"]').click()
+        self.wait_page_loaded()
+
+        # The objects have been created in the database.
+        self.assertEqual(Inner4Tabular.objects.all().count(), 4)
+
     def test_add_inlines(self):
         """
         The "Add another XXX" link correctly adds items to the inline form.
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