Issue #3248928: Redirect or provide link to apply form for user who started update if accessing start form

tests/src/Functional/UpdaterFormTest.php

@@ -256,16 +256,16 @@ class UpdaterFormTest extends AutomaticUpdatesFunctionalTestBase {
     $this->assertUpdateReady();
     $assert_session->buttonExists('Continue');
 
-    // Return to the start page.
+    // If we try to return to the start page, we should be redirected back to
+    // the confirmation page.
     $this->drupalGet('/admin/modules/automatic-update');
-    $assert_session->pageTextContainsOnce('Cannot begin an update because another Composer operation is currently in progress.');
-    $assert_session->buttonNotExists('Update');
+    $this->assertUpdateReady();
 
     // Delete the existing update.
-    $page->pressButton('Delete existing update');
-    $assert_session->pageTextContains('Staged update deleted');
+    $page->pressButton('Cancel update');
+    $assert_session->addressEquals('/admin/reports/updates/automatic-update');
+    $assert_session->pageTextContains('The update was successfully cancelled.');
     $assert_session->pageTextNotContains('Cannot begin an update because another Composer operation is currently in progress.');
-
     // Ensure we can start another update after deleting the existing one.
     $page->pressButton('Update');
     $this->checkForMetaRefresh();
@@ -274,12 +274,6 @@ class UpdaterFormTest extends AutomaticUpdatesFunctionalTestBase {
     $this->assertUpdateReady();
     $this->assertUpdateStagedTimes(2);
     $assert_session->buttonExists('Continue');
-    // Cancel the update, then ensure that we are bounced back to the start
-    // page, and that it will allow us to begin the update anew.
-    $page->pressButton('Cancel update');
-    $assert_session->addressEquals('/admin/reports/updates/automatic-update');
-    $assert_session->pageTextContains('The update was successfully cancelled.');
-    $assert_session->buttonExists('Update');
   }
 
   /**