Adding a file missed in a previous commit.

core/modules/system/lib/Drupal/system/Tests/Upgrade/BlockUpgradePathTest.php

+<?php
+
+/**
+ * @file
+ * Definition of Drupal\system\Tests\Upgrade\BlockUpgradePathTest.
+ */
+
+namespace Drupal\system\Tests\Upgrade;
+
+/**
+ * Tests upgrading a bare database.
+ *
+ * Loads a bare installation of Drupal 7 and runs the upgrade process on it.
+ */
+class BlockUpgradePathTest extends UpgradePathTestBase {
+
+  public static function getInfo() {
+    return array(
+      'name' => 'Block upgrade test',
+      'description' => 'Upgrade tests with block data.',
+      'group' => 'Upgrade path',
+    );
+  }
+
+  public function setUp() {
+    $this->databaseDumpFiles = array(
+      drupal_get_path('module', 'system') . '/tests/upgrade/drupal-7.bare.minimal.database.php.gz',
+    );
+    parent::setUp();
+  }
+
+  /**
+   * Tests block title length after successful upgrade.
+   */
+  public function testBlockUpgradeTitleLength() {
+    $this->assertTrue($this->performUpgrade(), 'The upgrade was completed successfully.');
+
+    // Add a new custom block with a title of 255 characters.
+    $block_title_1 = $this->randomName(255);
+    $custom_block_1 = array();
+    $custom_block_1['title'] = $block_title_1;
+    $custom_block_1['info'] = $this->randomName(8);
+    $custom_block_1['body[value]'] = $this->randomName(32);
+    $custom_block_1['regions[bartik]'] = 'sidebar_first';
+    $this->drupalPost('admin/structure/block/add', $custom_block_1, t('Save block'));
+    // Confirm that the custom block has been created, and title matches input.
+    $this->drupalGet('');
+    $this->assertText($block_title_1, 'Block with title longer than 64 characters successfully created.');
+
+    // Add a new custom block with a title over 255 characters.
+    $block_title_2 = $this->randomName(256);
+    $custom_block_2 = array();
+    $custom_block_2['title'] = $block_title_2;
+    $custom_block_2['info'] = $this->randomName(8);
+    $custom_block_2['body[value]'] = $this->randomName(32);
+    $this->drupalPost('admin/structure/block/add', $custom_block_2, t('Save block'));
+    // Confirm that the custom block cannot be created with title longer than
+    // the maximum number of characters.
+    $this->assertText('Block title cannot be longer than 255 characters', 'Block with title longer than 255 characters created unsuccessfully.');
+  }
+
+}